Static Roll Analysis

This is a quasi-static simulation during which a rolling movement is applied to the suspension and various parameters are calculated.

Required input:

Vehicle parameters:

-	Tire static loaded radius (mm)

-	Tire vertical spring rate (N/mm)

-	Vehicle CG height (mm)

-	Wheel base (mm)

-	Front braking ratio

-	Front drive ratio

-	Axle ratio

-	Vehicle weight (N)

Suspension travel:

-	Initial wheel position to begin rolling (mm)

-	Roll displacement magnitude (mm)

Description of task:

The suspension is moved to the initial wheel position. This is followed by a left and right rolling movement during which displacements of equal magnitude in opposite direction is applied.

Output:

Reports containing some plots, tabular results, and graphical animation are automatically created.

The following parameters are calculated during the simulation and the results are written to a text file (sdf.out). The same results are also written into the request file as user requests.

	Parameter	Units
	Wheel Center Displacement	mm
	Ground Reaction Force	N
	Toe-in	deg
	Steer Angle	deg
	Camber Angle	deg
	Roll Angle	deg
	Tread Width	mm
	Tread Change	mm/m
	Track Width	mm
	Wheel Center X Stiffness	N/mm
	Wheel Center Y Stiffness	N/mm
	Wheel Center Z Stiffness	N/mm
	Wheel Center XX Stiffness	N-m/deg
	Wheel Center YY Stiffness	N-m/deg
	Wheel Center ZZ Stiffness	N-m/deg
	Parallel Lateral Force Deflection	mm/kN
	Converging Lateral Force Deflection	mm/kN
	Parallel Lateral Force Steer	deg/kN
	Converging Lateral Force Steer	deg/kN
	Parallel Lateral Force Camber	deg/kN
	Converging Lateral Force Camber	deg/kN
	Parallel Aligning Torque Steer	deg/100N-m
	Converging Aligning Torque Steer	deg/100N-m
	Longitudinal Force Deflection @ Wheel Center	mm/kN
	Longitudinal Force Deflection @ Tire Patch	mm/kN
	Longitudinal Compliance Steer @ Wheel Center	deg/kN
	Longitudinal Compliance Steer @ Tire Patch	deg/kN
	Side View Swing Arm Length	mm
	Side View Swing Arm Angle	deg
	Side View Swing Arm Fore/Aft Location	mm
	Side View Swing Arm Vertical Location	mm
	Front View Swing Arm Length	mm
	Front View Swing Arm Angle	deg
	Front View Swing Arm Lateral Location	mm
	Front View Swing Arm Vertical Location	mm
	Ride Steer	deg/m
	Ride Camber	deg/m
	Roll Steer	%
	Roll Camber	%
	Roll Inclination	%
	Wheel Rate	N/mm
	Ride Rate	N/mm
	Hop Rate	N/mm
	Suspension Roll Rate	N-m/deg
	Total Roll Rate	N-m/deg
	Tramp Rate	N-m/deg
	Roll Center Height	mm
	Roll Center Lateral	mm
	Anti-lift	%
	Acceleration Lift	mm/g
	Anti-dive	%
	Brake Dive	mm/g
	Tractive Force Steer	deg/g
	Tractive Force Windup	deg/g
	Brake Steer	deg/g

Static Roll Analysis - Rear Suspension

Static Roll Analysis - Rear Suspension

Static Roll Analysis - Rear Suspension

See Also: