Suspension Analysis: Static Loads

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 _static_load to form the complete analysis name. For example, if you enter test_45 as the output prefix, the analysis name becomes test_45_static_load.

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.

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.

Aligning Torque

Enter values for the left and the right wheel that fix the upper bound and the lower bound of the aligning torques applied between ground and tire patches at the contact patches location.

Cornering Force

Enter values for the left and the right cornering force, applied at the contact patch. ISO-W Coordinates are used (positive is left from a drivers perspective). See Notes for reference frame info.

Braking Force

Enter values for the left and the right wheel that fix the upper bound and lower bound of the braking force applied between the test rig table and the wheels, at the tire contact patch. Positive braking force acts in the direction of the rear of the vehicle. This is in the negative direction of the ISO/Tydex coordinate system (see Notes).

Traction Force

Enter values for the traction force, applied at the wheel center.

Vertical Input

Select one of the options presented next:

Control the height of the contact patch point. The vertical actuators will move the suspension in the range you specify in the Vertical Length text box.

Control the height of the wheel center points. The vertical actuators will move the suspension in the range you specify in the Vertical Length text box.

 

Wheel Vertical Force

Control the absolute vertical force generated by the tire.

The vertical actuators will move the suspension in the range you specify in the Vertical Force text box.

Control the relative vertical force generated by the tire. The vertical actuators will move the suspension in the range specified by the vertical force fields. the force is relative to the vertical tire force generated between the wheel and the pads at static equilibrium position. For example a +-100 N with this option selected means that the test rig will apply +-100 N starting from the static equilibrium load.

Directly specify the vertical actuator loads.

Vertical Length/Force

Enter values for the vertical wheel input.

Overturning Tor.

Enter values for the overturning torque.

Roll. Res. Torque

Enter values for the rolling resistance torque.

Damage Force

Enter values for the damage force. Adams Car applies damage forces perpendicularly to the plane containing the wheel part. They are expressed in the ISO-C (TYDEX C) axis system.

For more information, see the About Axis Systems and Sign Conventions section.

Damage Radius

Enter values for the left and right damage radius. The damage radius determines the position of the point of application of the damage forces:

For more information, see the About Axis Systems and Sign Conventions section.

Steering Input

Select one of the following:

Steer Upper/Lower Limit

Enter values that fix the upper bound and the lower bound of the rack displacement (if Steering Input = Length), or of the steering wheel (if Steering Input = Angle). Positive rack displacement moves the rack towards the vehicle's right side. Positive steering-wheel angles rotate the steering wheel counterclockwise, typically steering the vehicle to the left.

Coordinate System

Select one of the following:

The icon shows the difference between the vehicle and iso coordinate systems.

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.