Multiframe 14.02 17 November 2011 Release Note Contents · 2013-11-13 · Multiframe 14.02 Release Note Page 3 Users can configure all general nonlinear settings as before such as

Multiframe 14.02 Release Note

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Multiframe 14.02 17 November 2011 Release Note

This release note describes the changes in version 14.02 of Multiframe, Steel Designer and Section Maker. System Requirements:

32-bit versions will run on Windows XP/Vista/7, and

64-bit versions will run on Windows 7 64-bit.

Contents Network dongle updates ..................................................................................................... 2

Multiframe ............................................................................................................... 2 Nonlinear Analysis Update ............................................................................ 2 Attach Member/Patch to Patch ...................................................................... 3 Detach Member/Patch to Patch ..................................................................... 4 Align Member to Patch or Load Panel .......................................................... 5 Automatically Align and Offset Member to Patch/Load Panel ..................... 6 Select Patch Edges ......................................................................................... 7 Select Opening Edges .................................................................................... 8 Edit Patch/Opening Edges ............................................................................. 8 Delete Patch/Opening Edges ......................................................................... 9 Add Rounded Corner Rectangular Opening .................................................. 9 Convert Opening to Patch ............................................................................ 11 Opening Duplicate ....................................................................................... 12 Opening Mirror ............................................................................................ 13 Opening Move ............................................................................................. 14 Opening Rotate ............................................................................................ 15 Patch/Opening Edge Extrude ....................................................................... 16 Generate N-sided Patch & Opening............................................................. 17 Member Offset Connections ........................................................................ 18 Self Weight .................................................................................................. 19 Centre of Gravity ......................................................................................... 19 Wind Load Case .......................................................................................... 20 Water Current Load Case ............................................................................ 21 Buoyancy Load Case ................................................................................... 26 Hydrostatic Load Case ................................................................................. 27 Bug fixes and minor changes ....................................................................... 30

Section Maker ........................................................................................................ 32 Problem Reports ..................................................................................................... 33


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Network dongle updates

This release requires that all network dongles be updated. All changes are fully backwards compatible, so you’ll still be able to run older versions of Multiframe easily. All customers will be sent a *.fds file - the name of which should match your network dongle number. (eg. NH0005376400018083.fds or SSN121.fds) This file will be required to update your network dongle. If you do not have this file you will need to contact FormSys support and provide your network dongle number and we’ll send it out to you. Once you have your .fds file, you will need to do the following:

1. Install Multiframe 14 on your server machine, and ensure when you do so that the following options are selected.

a. Copy Protection Device is connected to 'This Computer' b. Copy Protection Device Type is 'Network' c. Dongle type is 'Hasp Driver' or ‘Sentinel Driver’ as appropriate.

2. Continue through our installer and select the products you want. Note that for a server there's no need to actually install any products - so you can un-tick them all if you wish.

3. If you get prompted during setup to install the HASP License Manager and already have this installed then you can safely press Cancel when prompted for language and skip this step.

4. When Multiframe has been fully installed on your server, locate the *.fds file and double click on it. It should then prompt you if you wish to update your network dongle - say Ok and continue for it to reprogram your network dongle.

Congratulations – your network dongle has now been updated. You can immediately start using the new licenses and can now use the new Multiframe 14 versions from now on. Note that this step will only need to be done once for version 14, so once you're upgraded you won't need to do it for further updates of version 14 until we release a major version once more. Please note: If you’re a user of both Maxsurf and Multiframe, then this process will only need to be done once.

Multiframe

The following features have been modified or added to Multiframe in this release.

Nonlinear Analysis Update

To improve nonlinear server stability and usability, the nonlinear setting dialog has been modified as below.


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Users can configure all general nonlinear settings as before such as nonlinear effects, reporting & no of iterations etc. And more, with the new dialog, users are allowed to set different convergence tolerances for residual displacement and unbalanced forces. A tight tolerance for displacement and a slightly loose tolerance for force will normally get a satisfied solution as users require. The analysis reports show the max residual displacement & force at each iteration. This could help users to determine proper convergence tolerances for their design model or even for each load case when the nonlinear analysis doesn’t converge. Convergence of the solution within each increment is tested using a Residual Force or Displacement. The Residual Force norm is computed by dividing the maximum unbalanced force at the end of an iteration by the maximum force applied in the current increment. The Displacement norm is determined as the maximum change in displacement in an iteration which is normalised by the maximum total displacement at any joint in the structure. The user may choose whether to use an either or both of these norms to test convergence. Unless analysis time is an issue we suggest that both norms be used to test convergence as it is desirable for the value of both norms to be small at the end of an analysis.

Attach Member/Patch to Patch

Multiframe allows members/patches to be attached to patches in structural designing, so that those attached members or attached patch edges will be forced to mesh during patch meshing. Attach to Patch commands is available from the Geometry menu or from the patch toolbar. To attach a member/patch to patch

Select members and/or patches


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Choose Attach to Patch Command from the Geometry menu or icon

button

Detach Member/Patch to Patch

Multiframe allows members/patches to be detached from patches in structural designing, so that those detached members or patch edges will not be meshed during patch meshing. Detach from Patch commands is available from the Geometry menu or from the patch toolbar. To detach a member/patch to patch

Select members and patches that wish to be detached each other

Choose Detach from Patch Command from the Geometry menu or icon

button


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Align Member to Patch or Load Panel

It is possible to align a member so that it is perpendicular to the patch that it is attached to.

Select one or more members

Choose Member Orientation… from the Frame menu

The following dialog will be displayed


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From the Member Orientation dialog

Select Advanced

Select Normal of Patch/Load Panel

Choose Patch or Load Panel from the drop down box

Enter the Patch

If you select a patch or load panel as well as a member/s before opening the Member Orientation dialog, these last fields will already be populated. It is still possible for you to change them. The member will be orientated perpendicular to the patch on the same side as the patch normal. If you wish to align the member opposite the patch normal, then do the above and then click Flip X-X and the section will be rotated by 180 degrees. Any offset that the member has will also be reversed.

Automatically Align and Offset Member to Patch/Load Panel

The Member Align and Offset to Patch/Load Panel command will automatically align a member to be perpendicular to a patch or load panel. An offset is applied so that the bottom of the section is flush with the patch.

Select one or more members that are attached to

Choose Member Align and Offset to Patch/Load Panel… from the Frame

menu

The following dialog will appear,


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Select the side of the patch/load panel to orientate the member to. If more than one patch/load panel is selected, the selected members will be aligned to the first patch/load panel (ie lowest number). If a patch and a load panel is selected, the members will be aligned to the patch. Please note that the member will be offset to its base plus half the bending thickness of the patch. In the render mode the patch thickness is not drawn so the member will appear a small distance from the patch. Load panels do not have a thickness.

Select Patch Edges

There are many techniques and commands that are used to selecting patch edges like selecting a patch edge within a graphical window. The most common way of selecting items is by using the mouse. To select a single patch edge

Click the area inside the patch edge

The selected patch edge is drawn with the current selection colour to make it appear highlighted. A different colour for drawing the selection can be set via the Colour command in the View menu. To extend or reduce the selection

Shift-click on an unselected patch edge to add it to the current selection

Shift-click on a selected patch edge to remove it from the current

selection

Shift-drag to invert the selection in the selection rectangle

To select a group of items

Drag from left to right a rectangle which encloses the patch edges to be

selected

Drag from right to left to select all patch edges which intersect or are

contained inside the selection rectangle

When performing a drag selection there are two techniques for items. The first is by using a rectangular box as described above. An alternative to this is to use a line selection in which the user drags the end of a straight line across the screen. In this case all patch edges that intersect this line are selected.


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Select Opening Edges

There are many techniques and commands that are used to selecting opening edges like selecting a opening edge within a graphical window. The most common way of selecting items is by using the mouse. To select a single opening edge

Click the area inside the opening edge

The selected opening edge is drawn with the current selection colour to make it appear highlighted. A different colour for drawing the selection can be set via the Colour command in the View menu. To extend or reduce the selection

Shift-click on an unselected opening edge to add it to the current selection

Shift-click on a selected opening edge to remove it from the current

selection

Shift-drag to invert the selection in the selection rectangle

To select a group of items

Drag from left to right a rectangle which encloses the opening edges to be

selected

Drag from right to left to select all opening edges which intersect or are

contained inside the selection rectangle

When performing a drag selection there are two techniques for items. The first is by using a rectangular box as described above. An alternative to this is to use a line selection in which the user drags the end of a straight line across the screen. In this case all opening edges that intersect this line are selected.

Edit Patch/Opening Edges

To change the properties of a patch/opening edge

Double click on the patch/opening edge in the Frame window


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You can change the mesh type of a patch/opening edge, mesh density and mesh ratio etc. You can also decide whether you would like patch/opening edge members to be meshed or not. Patch/opening edge option will be very useful for users to interact with mesh density along the edges to their adjacent patches.

Delete Patch/Opening Edges

Either patch or opening edges cannot be deleted unless their parent patches or openings have been deleted.

Add Rounded Corner Rectangular Opening

Multiframe allows rounded corner rectangular openings to be drawn in structural designing. Add rounded corner rectangular opening command is available from the Geometry menu or from the patch toolbar. To add a rounded corner rectangular opening

Choose Add Opening Rounded Corner Rectangular from the

Geometry menu or icon button

Click two points or nodes that define the corners of the rectangular

opening


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Input corner radius and click OK button


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Convert Opening to Patch

Multiframe allows openings to be converted to patches in structural designing based on the selections of openings. Convert Opening to Patch commands is available from the Geometry menu or from the patch toolbar. To convert openings to patches

Select openings

Choose Convert Opening to Patch Command from the Geometry menu

or icon button


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Opening Duplicate

Multiframe allows openings to be copied in structural designing. Duplicate command is available from the Geometry menu or from the Geometry toolbar. To duplicate an opening

Select openings

Choose Duplicate from the Geometry menu or icon button


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Opening Mirror

Multiframe allows openings to be mirrored in structural designing. Mirror command is available from the Geometry menu or from the Geometry toolbar. To mirror an opening

Select openings

Choose Mirror from the Geometry menu or icon button

Draw or input mirror axes


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Opening Move

Multiframe allows openings to be moved in structural designing. Move command is available from the Geometry menu or from the Geometry toolbar. To move an opening

Select openings

Choose Move from the Geometry menu or icon button

Draw or input move location, Click OK button


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Opening Rotate

Multiframe allows openings to be rotated in structural designing. Rotate command is available from the Geometry menu or from the Geometry toolbar. To rotate an opening

Select openings

Choose Rotate from the Geometry menu or icon button

Draw or input rotate axes and angle, Click OK button


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Patch/Opening Edge Extrude

Multiframe allows both patch edges and opening edges to be extruded in structural designing. Extrude command is available from the Geometry menu or from the Geometry toolbar. To extrude a patch/opening edge

Select the patch/opening edge

Choose Extrude from the Geometry menu or icon button

Draw or input extrude axes, Click OK button


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Generate N-sided Patch & Opening

Multiframe allows N-sided patches & openings to be generated in structural designing based on the member selections. Auto-generate Patches & Auto-generate Openings commands are available from the Geometry menu or from the patch toolbar. To generate a N-sided patch

Select a list of members that form a N-sided patch

Choose Auto-generate Patches from the Geometry menu or icon button

To generate a N-sided opening

Select a list of members that form a N-sided opening


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Choose Auto-generate Openings Command from the Geometry menu or

icon button

Member Offset Connections

The member offset connection dialog has been improved.


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To open the Member Offsets dialog,


Choose Member Offsets… from the Frame menu


The Node labels now display the actual node numbers for each end of the selected member. If you tick the Same offset at both nodes checkbox the offsets at the second node will be autocompleted.

Self Weight

Include

For versions of Multiframe 14 and onwards, it is possible to include Joint Masses in the self weight calculation. By default they are turned off and are off for any models created in older versions of Multiframe. Similarly it is possible to include or exclude any combination of Members, Plates and Joint Masses.

Centre of Gravity

The centre of gravity calculation now includes Joint Masses.


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Wind Load Case

The following improvements have been made to the Wind Load Case.

Negative Heights in the Wind Profile

It is now possible to define negative heights in the wind profile and the chart in the Add Wind Load Case dialog will display them.

Patch and Load Panel Factors Dialog

The Patch and Load Panel factors dialog now display which wall or roof type Multiframe has identified for the selected item. To open the patch/load panel wind factors dialog

Select one or more patches or load panel

Choose Patch Wind Factors… or Load Panel Wind Factors… from the

Case menu



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If the selection made by Multiframe is incorrect, the user is now able to overwrite it by selecting a different wall/roof type. If the External Pressure Coefficient calculation is swicthed to Calculated the value of Cp,e will be updated instantly.

Awnings and Hoarding

The Wind load case now includes calculations of External Pressure coefficient for Awnings and Hoarding in accordance with Chapers D4 and D2 of AS1170 respectively. Multiframe is unable to automatically detect these type of structures therefore the user must assign them using the Patch/Load Panel factors dialog as described above. Once assigned the calculations for Cp,e will be automatically updated.

Display Load Panel/Patch Wind Pressure Coefficients

It is possible to display the Load Panel and Patch wind pressure coefficients directly on to the panel/patch that they refer to. To do this.

Choose Symbols… from the Display menu

Select Pressure Coeff from either the Panel or Patch group

To view the value clearly you may have to turn off the panel/patch loads and any other labels.

Water Current Load Case

Multiframe 3D allows you to add a Water Current load case, which automates the adding of fluid loads from a defined to direction to the whole structure. To create a Water Current Load Case

Choose Water Current… from the Add Case menu in the Case menu

A dialog will be displayed which allows you to enter details of the current strength and direction and which variables you would like to be automatically calculated. Multiframe converts this information loads on the structure.


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Water Current Profile

Define the water current velocity profile as pairs of height and velocity values. A height of zero is equivalent to the global axis origin ie y = 0. Use the Add Row button to increase the number of points that defines the profile. Select a row and press Delete to remove a row. The current profile is shown graphically as you enter the values.

Height of Water Level

Enter the depth of the water above the origin. Any part of the structure that protrudes above the surface of the water will not have a Water Current load applied to it.

Water Density

Enter a value of water density. The water current pressure is calculated by

P = 0.5*water*V2*C

Where C is a combination of the user and shape factors

Water Current Direction

Enter the water current direction. The water current is applied horizontally in the x-z plane. A value of zero applied the water current along the x-axis. Positive angles of water current direction represent a rotation anti-clockwise.

Include Members/Patches/Load Panels

Tick the include check boxes to include/ignore any type of element from having a water current load applied.


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Auto-calculate

Tick the check boxes to define which factors are automatically calculated. If the boxes are not ticked the default value is applied. The member factors are:

Cf – Drag force coefficients. As defined by AS1170 Appendix E3. Defaults to 1.5.

Cp – External pressure coefficient as defined with the Set Pressure Coeffs button. Defailts to 0.8.

To define your own pressure coefficients, press the button Set Pressure Coeffs. The following dialog will be displayed

Enter values of pressure coefficient for each of the sides of your structure as described in the diagram. For sloping sides it is possible to define different pressure coefficients for varying angles of slope.

Copy settings from previous Water Current Load Case

If you have already defined a water current load case it is possible to copy the settings from that load case by ticking the check box at the bottom of the add Water Current load case dialog.

Member Water Current Shielding Factor

Edit the member water current shielding factor to account for any shielding within the structure. One or more shielding factors can be changed at the same time by selecting multiple members. To edit the member water current shielding factor


Choose Member Water Current Shielding Factor… from the Case menu



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Member Water Current Factors

The automatically calculated member water current factors for each individual member can be edited via the Member Water Current Factors dialog. To edit the member water current factors


Choose Member Water Current Factors… from the Case menu


As well as allowing the factors to be changed the orientation of the section is displayed. Water Currents are resolved into local member loads. Thus major and minor axis loads are applied in the directions shown in the dialog. Each of these loads has a pair of shape factors associated with them. Please note that for symmetrical sections, the transverse shape factor for each direction ie CF,y for Major axis loading and CF,x for Minor axis loading, is set to zero instead of applying two transverse loads in opposing directions, which would cancel each other out.

Patch Water Current Factors

The automatically calculated patch water current factors for each individual patch can be edited via the Patch Water Current Factors dialog. To edit the patch water current factors


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Select one or more patches

Choose Patch Water Current Factors… from the Case menu


The wall/roof type for the selected patch is indicated by the radio buttons and diagram. If Multiframe has incorrectly identified a wall it is possible to overwrite the selection by clicking one of the other wall types. If the External Pressure coefficient selection is set to Calculated the value of Cp,e will be automatically updated.

Load Panel Water Current Factors

The load panel water current factors can be edited via the load panel water current factors dialog. To edit the load panel water current factors

Select one or more load panels

Choose Load Panel Water Current Factors… from the Case menu

A similar dialog to the Patch Water Current Factors will be displayed.

Display Load Panel/Patch Water Current Pressure Coefficients

It is possible to display the Load Panel and Patch water current pressure coefficients directly on to the panel/patch that they refer to. To do this.

Choose Symbols… from the Display menu

Select Pressure Coeff from either the Panel or Patch group

To view the value clearly you may have to turn off the panel/patch loads and any other labels.


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Buoyancy Load Case

Multiframe allows you to add a Buoyancy load case, which automates the applying of fluid buoyancy loads to the whole structure. To create a Buoyancy Load Case

Choose Buoyancy… from the Add Case menu in the Case menu

A dialog will be displayed which allows you to enter details of the buoyancy load case.

Water Density

Enter a value of water density.

Height of Water Level

Enter the height of the water level above the origin. Any part of the structure that protrudes above the surface of the water will not have a Buoyancy load applied to it.

Gravity

Enter the value of gravitational acceleration.

Flood Hollow Members

Tick the check box to flood any hollow (SHS, RHS, tubes) members. If this button is un-checked the buoyancy of such members is taken to be that of their total enclosed volume.

Member Buoyancy

Individual member buoyancy factors can be edited by using the Member Buoyancy dialog. To edit the member buoyancy


Choose Member Buoyancy… from the Case menu



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Members can be completely ignored (no buoyancy load applied) or their flooded status set.

Patch Buoyancy

Individual patch buoyancy factors can be edited by using the Patch Buoyancy dialog. To edit the patch buoyancy

Select one or more patches

Choose Patch Buoyancy… from the Case menu


Patches can be completely ignored (no buoyancy load applied).

Plate Buoyancy

A dialog similar to that for patch buoyancy can be used to edit individual plate buoyancy factors. Plate selection must be turned on and one or more plate selected to access this dialog.

Hydrostatic Load Case

Multiframe allows you to add a Hydrostatic load case, which automates the applying of fluid hydrostatic loads to the structure. To create a Hydrostatic Load Case

Choose Hydrostatic… from the Add Case menu in the Case menu

A dialog will be displayed which allows you to enter details of the hydrostatic load case.


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Fluid Density

Enter a value of fluid density.

Height of Fluid Level

Enter the height of the fluid level above the origin. Any part of the structure that protrudes above the surface of the fluid will not have a Hydrostatic load applied to it.

Gravity

Enter the value of gravitational acceleration.

Fluid is Inside the Structure

Tick this check box if you are modelling a tank or similar that contains a fluid ie the pressure is pushing out. Leave it un-ticked if you and modelling a structure that is submerged in a fluid ie a boat.

Only apply loads to selected items

Tick this check box if you only want to apply hydrostatic loads to the patches, panels and elements that you had selected in the Load window before opening the Add Hydrotstatic Load Case dialog. If you leave this check box un-ticked, Hydrostatic loads will be applied to the whole structure.

Model Type

The hydrostatic load case is intended for two different types of model:


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1. A ship hull cross-section made up of members only. In this case the tributary area width is required that the fluid pressure is applied over. This would typically be the length of one frame spacing.

2. A 3D patch/load panel model where the fluid pressure is applied to the patches/panels ie a whole ship or a tank.

Multiframe will detect if there are any patches or load panels in the model and choose the appropriate model type accordingly. If this selection is wrong the user can override it.

Define an Internal Point

In order that the loads are applied in the correct direction, a internal point must be defined inside the structure. All the loads will be applied to/from thus point, depending whether the fluid is inside or outside of the structure. As a first guess, Multiframe uses the centre of gravity of the structure. If this not correct, the user can define a point themselves.

Copy settings from previous Hydrostatic Load Case

If you have already defined a hydrostatic load case it is possible to copy the settings from that load case by ticking the check box at the bottom of the add Hydrostatic load case dialog.

Member Hydrostatic

Individual member hydrostatic factors can be edited by using the Member Hydrostatic dialog. To edit the member hydrostatic


Choose Member Hydrostatic… from the Case menu


Members can be completely ignored (no hydrostatic load applied) or the direction of the hydrostatic load switched.

Patch, Plate and Load Panel Hydrostatic

A dialog similar to that for member hydrostatic can be used to edit individual patch, plate or load panel hydrostatic factors. Plate selection must be turned on and one or more plate selected to access the plate hydrostatic dialog.


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Bug fixes and minor changes

Change from 14.01 to 14.02

Bug 3409: Wrong shear force diagram with short members, for example, less than

0.3m in length;

Bug 3587 – The arc arrow marks of moments cannot be displayed on the print view

page;

Bug 3588 – Patch point load positions cannot be editable from Data Window;

Bug 3589 – Patch point load issue – a patch has only accepted the first point load

and ignored the others;

Bug 3590 – Convergence issue for modal analysis - fail to do modal analysis with

50 modes for certain models;

Bug 3607 – Cannot assign or change member materials due to the wrong material

ID created;

Bug 3608 – Missing point load directions when importing Spacegass files;

Bug 3610 – Patch non-uniform meshing crash when configuring decimal point as

“,” rather than “.’;

Bug 3618 – Rendering is not drawing offsets correctly for angles and unequal

angles;

Bug 3622 – Patch non-uniform meshing crash when model has duplicated nodes or

members;

Bug 3623 – Cannot detach a members from a patch in some special scenarios;

Bug 3624 – Patch re-meshing lose the edge restraints;

Bug 3628 – Max member actions/stresses are not correct in Max Stress table with

short members, for example, less than 0.3m in length;

Bug 3594 – Eurocode 3; corrections were made to the rectangular and square

hollow sections in the Swedish Sections library

Bug 3595 – Eurocode 3; The wrong buckling length was used for members

supported by rollers. This remains as it is hard to test for the direction that rollers

act and the current solution is conservative. However fields for kcr (critical buckling

factor) which overwrite the calculated value have been added to the Design

Compression dialog.

Bug 3599 – Iw, torsional constant, added to the Japanese sections library where

available.

Bug 3600 – AIJ Design Check. An issue where the wrong factor (should have been

2.17) was used in the calculation of fb has been fixed.

Bug 3601 – Eurocode 3; Several issues have been fixed including the Bixial

Bending + Axial Force check not including the axial stress in a member and the

wrong limit (should be 2 not 0.2) in the calculation of alphaT for lateral torsional

buckling.

Bug 3602 – AIJ Design Code. A bug where the same values are used for both major

and minor axis flexure has been fixed.

Bug 3603 – A bug where the Wind Load case settings were not saved in

Multiframe3D has been fixed.

Bug 3614 – A bug where the building height in the Wind Load Case was not stored

correctly if the length units are set to anything other than m has been fixed.

Bug 3616 – AS4100 Design Check. The Design Compression dialog was displaying

a zero error message incorrectly. Now fixed.


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Bug 3617 – The auto offset and align command wasn’t working correctly for angle

sections.

Bug 3631 – Crash on drawing or create design members with certain models.

Bug 3642 – Cannot copy section groups from one lib to another while materials do

not exist.

Change from 14.00 to 14.01

Bug 3580 – Shouldn’t be possible to do a design check to the Chinese code if no

Steel Designer

Bug 3581 – MF Crash on picking up section type if sections misplaced in wrong

group

Bug 3583 – Cannot apply load panel loads to load panels in academic versions

Bug 3585 – Crash on exporting tube section members to 3D dxf file while in

rendering mode

Changes from 14.b3 to 14:

Bug 3561: Steel Designer Eurocode 3: A bug with the Biaxial Bending 7 Axial force

check was reporting PASSED, even if it had FAILED has been fixed

Bug 3563: Steel Designer Eurocode 3:The correct stress if now used in the

Bending and Axial force check for Class 3 sections

Bug 3540: Wind LC: For symmetrical sections, transverse shape factors are set to

zero instead of applying lift loads to either side, which would cancel each other out

Bug 3016: Member colours don't match the colour of legend in rendering mode

Bug 3535: Issue of streaming MF results to word when report is set to none

Bug 3537: Linear analysis(T/C) report buttons seem not working

Bug 3540: Wrong shear force diagram with NL analysis when member is in tension

Bug 3560: Plot labels colour can't be altered from font dialog

Bug 3567: Mapping patch edge releases to plates issue

Bug 3568: Masking patch to selection doesn’t work for plate table in Data Window

Changes from 14.b2 to 14b3:

Bug 3534: A bug where the patch Self Weight results are incorrect if there is a Wind

Load Case in the model has been fixed

Bug 3539: For the Wind Load Case and Water Current Load Case, only the square

of the angle of the force was not considered. This only affected cases where the

force was not orthogonal to the model

Bug 3540: Wind Load Case; some section shape factors have been modified where

errors were found

Bug 3543: The Member Stresses tab in the Results window for an Envelope load

case now displays the highest stress values, regardless of sign

Bug 3556: Steel Designer ASD code: Equation (A-B5-9) for axially loaded slender

circular sections has been added

Changes from 14.b1 to 14b2:


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Bug 3523: Patch mesh problem - crash nodes in space-no triangles

Bug 3530: Shouldn't generate overlapped patches

Bug 3531: Crash on adding a patch opening that shares a common edge with the

patch

Bug 3527: Water Current LC – Members with one end at the same height as a

change in the Water Current Profile had the wrong water velocity applied

Bug 3511: Several errors in the Swedish sections library have been corrected

Bug 3515: Section Maker – errors in the Mass calculation for cold formed sections

have been corrected

Bug 3528: Joint Mass dialog now has a check box to link x,y and z directions

Bug 3534: A bug where Patch self weights were not considered if there was a Wind

Load Case in the model has been fixed

Changes from 13.04 to 14b1:

Bug 3324: When the joint restraint dialog is opened, the current restraint at that

joint is now shown, rather than a pinned restraint if there are no restraints.

Bug 3414: AS4600 Steel Designer code. It is now possible to edit the AS4600 Steel

Designer variables through the Design Details tab in the Data window.

Fix to bug #3475: Models with Plate and Tension/Compression only members do

not analyse with a linear analysis

Fix to bug #3492: Crash on member merging when connections were broken

Fix to bug #3493: T/C only member structure does not converge on self weight load

case

Fix to bug #3495: Plot diagram issue for T & C only member when it becomes

inactive.

Fix to bug #3496: Report heading issue when doing linear & NL analysis for T/C

only members

Fix to bug #3505: Stability improvement of non-linear server

Fix to bug #3512: Crash on importing SpaceGass text file in MF3D

Section Maker

Torsion and Warping Constant

When calculating the torsion constant J and the warping constant Iw, SectionMaker uses two methods. By default it looks at the shape of the section and uses a formula from

Roark Stress & Strain to estimate J. For a thin walled section this will be 1/3.b.t^3. These formulas are approximate. To indicate that the J and Iw values are approximate, SectionMaker now displays a * character after the variable in the Properties window (J* and Iw*). If you use the Advanced calculations option from the Shape menu, SectionMaker uses a finite element analysis of the cross section to calculate an accurate value for J and Iw. When this method has been used, the * character will not be displayed to indicate that the value shown is accurate.(J and Iw)


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Problem Reports

We greatly appreciate any bug reports or suggestions you may have. Please report any bugs or anomalies you find to: Fax: +61 8 9335 1526 Email: [email protected]

Documents

Multiframe 14.02 17 November 2011 Release Note Contents · 2013-11-13 · Multiframe 14.02 Release Note Page 3 Users can configure all general nonlinear settings as before such as