WS12-1PAT301, Workshop 12, December 2005Copyright© 2005 MSC.Software Corporation

WORKSHOP 12ANCHOR LOADS AND

BOUNDARY CONDITIONS USING A FIELD

WS12-2PAT301, Workshop 12, December 2005Copyright© 2005 MSC.Software Corporation

WS12-3PAT301, Workshop 12, December 2005Copyright© 2005 MSC.Software Corporation

Workshop ObjectivesUsing a field for pressure loading, and creating constraints at the locations for washers

Problem DescriptionCreate a field with the sin function, SINR(‘T)Create pressure loading, at the upper part of the anchor, using the fieldCreate constraints at the location where washers are to go (lower part of the anchor)

Software VersionMSC.Patran 2005r2

WS12-4PAT301, Workshop 12, December 2005Copyright© 2005 MSC.Software Corporation

Key Concepts and Steps:Database: open an existing database, Anchor.dbGeometry: create a rectangular coordinate system at the center of the holes where the pressure is to be appliedFields: create a function SINR(‘T) using the coordinate systemLoads/BCs: create the pressure loading using the fieldLoads/BCs: create the displacement constraint where the washers are to go

WS12-5PAT301, Workshop 12, December 2005Copyright© 2005 MSC.Software Corporation

Step 1. Open Database

Open existing database called Anchor.db

a. File / Open.b. Select Anchor.db.c. Click OK.

a

b

c

WS12-6PAT301, Workshop 12, December 2005Copyright© 2005 MSC.Software Corporation

Step 2. Plot Only Solid and Points

Plot only the solid and geometric points.

a. Click Wireframe icon.b. Click Plot/Erase icon.c. Click Erase for All.d. Enter Solid 1 Point1:#

for Selected Entities.e. Click Plot then OK.f. Click View corners icon

and see figure for dragging.

ab

c

d

e

f

f

WS12-7PAT301, Workshop 12, December 2005Copyright© 2005 MSC.Software Corporation

Step 3. Create Point at Center of Arc

Create point at center of arc using ArcCenter.

a. Geometry: Create / Point / ArcCenter.

b. See Figure for Curve List. Make sure to select on the Edge icon.

a

b

WS12-8PAT301, Workshop 12, December 2005Copyright© 2005 MSC.Software Corporation

Step 4. Create Cylindrical Coordinate System

Create cylindrical coordinate system using 3Point method.

a. Geometry: Create / Coord / 3Point.

b. Select Cylindrical for Type.c. See figure for Origin.d. See figure for Point on Axis 3.e. See figure for Point on Plane

1-3.

a

b

c

d

e

c

d

e

WS12-9PAT301, Workshop 12, December 2005Copyright© 2005 MSC.Software Corporation

Step 5. Create Field for Pressure Loading

Create field that uses sin(theta).a. Fields : Create / Spatial / PCL Function.b. Enter sine_theta for Field Name.c. Select Scalar for Field Type.d. Select Real for Coordinate System Type.e. Select Coord 2 for Coordinate System.f. Enter sinr( then pick ‘T at the bottom of the

form. Then, close expression with ).g. Click Apply.

a

b

c

d

e

f

WS12-10PAT301, Workshop 12, December 2005Copyright© 2005 MSC.Software Corporation

Step 6. Create Pressure Loading

Use the field to create pressure loading.a. Loads/BCs: Create / Pressure /

Element Uniform.b. Enter pressure_load for New Set

Name.c. Click Input Data…d. Enter 1000 for Load/BC Set Scale

Factor.e. Click in the Pressure box then

select sine_theta from the Spatial Fields box.

f. Click OK..g. Click Select Application

Region…

a

b

c

d

e

f

g

WS12-11PAT301, Workshop 12, December 2005Copyright© 2005 MSC.Software Corporation

Step 6. Create Pressure Loading (Cont.)

Select entities for application region for pressure loading.

a. Select Geometry for Geometry Filter.b. See Figure for Select Solid Faces. Select

the four faces at top of holes.c. Click Add.d. Click OK.e. Click Apply.

a

b

d

e

c

WS12-12PAT301, Workshop 12, December 2005Copyright© 2005 MSC.Software Corporation

Step 6. Create Pressure Loading (Cont.)

WS12-13PAT301, Workshop 12, December 2005Copyright© 2005 MSC.Software Corporation

Step 7. Constrain at Washers

Constraint at location of three washers.a. Loads/BCs: Create / Displacement /

Nodal.b. Enter fix_at_washers.c. Click Input Data…d. Enter <0,0,0> for Translations e. <T1 T2 T3> only.f. Click OKg. Click Select Application Region..

a

b

c

d

ef

WS12-14PAT301, Workshop 12, December 2005Copyright© 2005 MSC.Software Corporation

Step 7. Constrain at Washers (Cont.)

Select solid faces at location of washers

a. Use Mouse rotate icon and rotate to the view as shown.

b. Click Smooth Shadeicon. (easier to view)

c. Select Geometry for Geometry Filter. Click on the Surface or face icon.

d. See Figure for Select Geometry Entities. (8 faces)

e. Click Add, OK and Apply.

f. Click Wireframe icon.

a b

c

d

e

f

ee

WS12-15PAT301, Workshop 12, December 2005Copyright© 2005 MSC.Software Corporation

Step 8. Plot Loads/ BCs Markers for Pressure and Constraints

Plot markers for load and boundary conditions.

a. Loads/BCs: Plot Markers.b. Select Displ_fix_at_washers

and Press_pressure_load for Assigned Load/BC Sets.

c. Select Current Viewport for Group filter.

d. Select default_group for Select Groups.

e. Click Apply.

a

b

c

d

e

WS12-16PAT301, Workshop 12, December 2005Copyright© 2005 MSC.Software Corporation

Step 9. Quit MSC.Patran

Quit MSC.Patrana. Select File on the Menu Bar

and select Quit from the drop down menu

a