Suspension Analysis: Roll & Vertical Force

Suspension Assembly

Select the Suspension Assembly you want to analyze. The menu lists all suspension assemblies currently open in your session.

Assembly Variant

Select the assembly variant you want to analyze. The menu lists all suspension assembly variants of the chosen assembly.

Switches to the selected variant and adds the required testrig as needed.

Output Prefix

Enter a string that specifies the Analysis Output Name. The string can contain only alphanumeric characters and underscores (_). Adams Car appends the suffix _roll_angle to form the complete analysis name. For example, if you enter test_45 as the output prefix, the analysis name becomes test_45_roll_angle.

Solver Settings File

Select one or more files (extension .ssf) defining the solver settings to be temporarily applied for this simulation (optional).

Opens the Solver Settings File (extension .ssf) editor dialog box.

Number of Steps

Enter a value that corresponds to the number of Solution Steps from the lower bounds to the upper bounds of input.

For example, if you specify five solution steps, -10 degree and 10 degree roll-angle sweep, the loadcase file that Adams Car automatically generates will contain roll displacement inputs of -10, -6, -2, 2, 6, and 10 degrees.

Mode of Simulation

Select interactive, background, graphical, files or event only.

See Mode of Simulation: Interactive, Mode of Simulation: Graphical, Mode of Simulation: Background, Mode of Simulation: Files_only, Mode of Simulation: Event_only.

Vertical Setup Mode

Specifies the vertical control method at time=0. Vertical setup will be performed with either the wheel center height or the contact patch height moved to zero. For more information please see the tutorial Adding the vertical setup mode of Adams Car Suspension Testrig.

If suspension is built with __MDI_TASA_TESTRIG (available in Adams Car Truck plugin), then Fore Axle and Aft Axle tabs will be displayed. The following options are available:

Fore Axle

Used to define inputs for fore axle. By default, the values provided in the fields on Fore Axle tab will be applied to the fields on Aft Axle tab.

Aft Axle

Used to define inputs for aft axle. Fields on the Aft Axle tab are optional. If values are not provided, they will be inherited from the Fore Axle tab.

Roll Angle Upper

Enter a real value that fixes the upper limit of roll angle displacement. The orientation of the tables measures the roll angle. A positive value causes the left test-rig wheel to be moved upward and the right test-rig wheel downward.

Roll Angle Lower

Enter a real value that fixes the lower limit of roll angle displacement. The orientation of the tables measures the roll angle. A positive value causes the left test-rig wheel to be moved upward and the right test-rig wheel downward.

Vertical Input

Total Vertical Force

Enter a real value that specifies the total amount of vertical force available to the left and right actuators. The value represents the sum of the left and right wheel vertical forces measured by the test-rig tires.

Fixed Steer Position (optional)

Enter a real value that fixes either the rack displacement or the steering wheel, depending on the steering input mode you selected:

Steering Input

Select one of the following:

Create Event Log File

Select if you want Adams Car to write information about the assembled model and analysis to an Analysis Log File.

Select to display a dialog box where you can add multi-line comments to any entity, to describe its purpose and function. Adams Car displays different comments dialog boxes, depending on the entity type for which you want to record comments:

Learn about Recording Comments.

Select to display an Alignment dialog box where you can set toe, camber and caster alignment values.