WS1_Open and Run an Assembly

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WS1-1 ADM740, Workshop 1, May 2012

Copyright 2012 MSC.Software Corporation

WORKSHOP 1

OPEN AND RUN AN ASSEMBLY









Open and Run an Assembly

● Problem statement

● This workshop introduces you to a couple of typical Adams/Car simulations. Adams/Car basically runs either suspension or full-

vehicle analyses. Here, you will perform an ISO lane change for

a full vehicle. You will also look at the various database related

actions in the Adams/Car interface.






● Setting Up Your Session

● To create a working directory:

● Depending on the platform you’re on, do one of the following:

● On Windows:

● On your hard drive, create a new folder acar . For example, C:\acar.

● On UNIX:

● To start Adams/Car in your home directory, open an UNIX shell and type cd.

● To create a directory named acar , type mkdir acar .● To move to the new directory, type cd acar .

● To start Adams/Car:

● Depending on the platform you’re on, do one of the following:

● On Windows, from the Start button, point to All Programs, point to

MSC.Software, point to Adams 2012, point to ACar , and then selectAdams - Car .

● At your UNIX shell prompt, type adams2012.

● From the toolbar, select the Adams/Car tool .

The Welcome dialog box appears.





● To toggle to Standard Interface:

● From the Welcome dialog box, select Standard Interface, andthen select OK. (Sometimes the Welcome dialog box contains

the option to select a mode, and other times it does not. This

depends on the configuration file.) To run analyses, you must be

in the Standard Interface mode.

● Once in an Adams/Car session, you can toggle between modes

by selecting Adams/Car Standard Interface from the Tools

menu. If Adams/Car Template Builder is listed, then you are

already in the Standard Interface mode.







● To set the working directory:

1. From the File menu, select Select Directory.

2. Select the acar directory you just created.

3. Select OK.

Adams/Car sets the working directory where it will write your

output files.

● To create a new database and set it as the writable database:

1. From the Tools menu, point to Database Management, and thenselect Create Database.

The Create New Database dialog box appears.

2. In the Database Alias text box, enter acar_training.

3. In the Database Path text box, explicitly define the path for the

new database. For Example:

● On Windows: c:\acar\acar_training.cdb

● On UNIX: /acar/acar_training.cdb

Adams/Car creates a new database named acar_training.cdb.






4. Select OK.

This creates the directory and adds it to your list of searchable

databases in your Adams/Car session.5. To verify that this database has been added to your session,

from the Tools menu, point to Database Management, and

then select Database Info.

6. From the Tools menu, point to Database Management, and

then select Set Default Writable.

7. Make sure that Database Name is set to acar_training (select

the down arrow and then select acar_training).

8. Select OK.

Adams/Car automatically saves the configuration file.





● Open .acar.cfg● Locate .acar.cfg file on your machine

● By default it would be in the directory pointed to by the HOME systemenvironment variable. Look through it and note the new acar_training

database and its path listed.

● Note following entry:

DATABASE acar_training C:/acar/acar_training.cdb

Adams/Car Database and Working Directory










● To perform an analysis:

1.From the Simulate menu, point to Full-Vehicle Analysis, pointto Course Events, and then select ISO Lane Change.

2. In the Output Prefix text box, enter workshop1a.

3. In the Initial Velocity text box, enter 70. The default units

should be km/hr.

4. Select OK.In the Message window, Adams/Car informs you about the

progress of the analysis and when the simulation is complete.

5. Close the Message window.






● To investigate the results:

1. From the Review menu, select Animation Controls.

2. To animate the assembly, select the Play tool .

3. Zoom out to see more of the road grid:

● Type a lowercase z.

● Hold down the left mouse button, and do either of the following:

● To enlarge the display of the assembly, or zoom in, move the cursor up.

● To shrink the display of the assembly, or zoom out, move the cursor down.

● To exit zoom mode, release the mouse button.● To trace the motion of the vehicle:

1. In the Animation Controls dialog box, change No Trace to Trace

Marker .

2. Right-click the Trace Marker text box, point to Marker , and then select

Browse.The Database Navigator appears.

3. Double-click MDI_Demo_Vehicle, double-click TR_Body, double-click

ges_chassis, and then select cm.

4. Select OK.






● To follow the car in the animation:

1.Change

Fixed Baseto

Base Part.

2. Right-click the Base Part text box, point to Body, and then

select Pick.

3. Move the cursor over the vehicle and right-click to see a list of

parts in the area of the cursor.

4. Select any of the vehicle’s parts; for example, you can selectges_chassis.

5. Select the Play tool .

The camera should move with the car, as the white line traces

the path of the body marker.

6. Close the Animation Controls dialog box by selecting the x inthe upper right corner.






● To animate the full-vehicle from the driver's perspective:

1. From the Review menu, select Postprocessing window or

press F8.

2. Right-click the viewport (main window), and then select Load

Animation.

Database Navigator opens.

3. Select workshop1a_ilc, and then select OK. Adams/PostProcessor loads the animation into the viewport.

4. Press Ctrl + f to fit the vehicle to the window.

5. Press the c key and pick a point on the vehicle as the new

center of rotation.

6. To rotate the vehicle to look at the rear, press the r key and

hold down the left-mouse button while moving the mouse to

rotate the vehicle.








●Investigate the output files created with the run:1. Browse to the acar directory you just created and see the different

files written out to the directory. What are they? ___________________________________

●Save Assembly1. From the File Menu , point to Save As – Assembly

2.The New Assembly Name : MDI_Demo_Vehicle_saved

3. Make sure Target Database: acar_training4. Check ‘Close Assembly after Save”

5. Browse to the C:\acar\acar_training.cdb\assemblies.tbl usingWindows Explorer

6. Open the MDI_Demo_Vehicle_saved.asy file with a text editor

and keep it open.7. Now go to C:\acar\acar_training.cdb\subsystems.tbl. What do

you see?

__________________________________

Ad /C D b d W ki Di





● To Copy one assembly to another database so that your colleague gets a fresh copy to work with:

1. From the File menu, point to Open, and then select Assembly.

2. Right-click the Assembly Name text box, point to Search, select

<acar_shared>\assemblies.tbl, and then select

MDI_Demo_Vehicle.asy.

3. Select OK.

4. From the Tools menu, point to Database Management, and then

select Publish Assembly 5. Fill the box in as follows:

• File Name: MDI_Demo_Vehicle

• Publish To: Database

• Write Mode: Overwrite

• Target Database: acar_training

• Check Include Template file

• Check Update Session Data with ‘Target Database’

Select OK


Ad /C D t b d W ki Di t





6. Browse to C:\acar\acar_training.cdb\assemblies.tbl.

7. Open the MDI_DEMO_Vehicle.asy file with a text editor.

Compare this with the previous

MDI_Demo_Vehicle_saved.asy. Do you see any difference?

8. What is the most prominent difference between the two saved

files in step 7? Can you summarize what the difference is

between doing a Save As and Publishing an assembly?

Look at how the different subsystems are being referenced in the two assembly

*.asy files. One references the shared database for the subsystem files and the

other references the subsystems in acar_training database.


O ti l O d R S i A bl





Optional - Open and Run a Suspension Assembly

● Simulating a suspension assembly● You simulate a suspension assembly in the same way you

simulated the full-vehicle assembly.

● To open a suspension assembly:1. From the File menu, point to Open, and then select Assembly.

2. Right-click the Assembly Name text box, point to Search,

select <acar_shared>\assemblies.tbl,and then selectmdi_front_vehicle.asy.

3. Select OK.

In the Message window, Adams/Car informs you when the

vehicle assembly is ready.

4. Close the Message window.

O d R S i A bl





Open and Run a Suspension Assembly

● To perform a parallel wheel travel suspension analysis:

1. From the Simulate menu, point to Suspension Analyses, and

then select Parallel Wheel Travel.

2. Set up the analysis:

● Output Prefix: workshop1b

● Number of Steps: 10

● Bump Travel: 100● Rebound Travel: -100

The default units for Bump and Rebound Travel should be mm

(Settings Units).

3. Select OK.

4. When the analysis is complete, close the Message window.

O d R S i A bl





Open and Run a Suspension Assembly

● To review the results by animating your assembly:1. From the Review menu, select Animation Controls.

2. Change Base Part to Fixed Base.3. Change Trace Marker to No Trace.

4. Select Play.

● To trace the path of a vehicle’s marker: 1. Change No Trace to Trace Marker .

2. Right-click the Trace Marker text box, point to Marker , and then

select Browse.

The Database Navigator appears.

3. Double-click MDI_FRONT_SUSPENSION, double-click

gel_spindle, and then double-click cm.4. Select Play.

5. Zoom in to look for the white line that traces the path of the

gel_spindle.cm marker.





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WS1_Open and Run an Assembly