*SetForce() - asymmetric rotational

Sets the values for an asymmetric rotational action-only or action-reaction force pair.

Syntax

*SetForce(force_name, , TYPE_tx_l, TOKEN_tx_l, 
                                  TYPE_ty_l, TOKEN_ty_l, 
                                  TYPE_tz_l, TOKEN_tz_l, 
                                  TYPE_tx_r, TOKEN_tx_r, 
                                  TYPE_ty_r, TOKEN_ty_r, 
                                  TYPE_tz_r, TOKEN_tz_r)

Token

If you select this TYPE, use this TOKEN

LIN

Enter a value for tx_l, ty_l, tz_l, tx_r, ty_r, and tz_r.

Token: Value

CRV

Use a Curve to represent the torque behavior. See Comments.

Token: curve_name,

AKIMA|CUBIC|LINEAR|QUINTIC,

`indep_variable`

SPL3D

Use a Spline3D to represent the torque behavior. See Comments.

Token: spl3d_name,

AKIMA|CUBIC|LINEAR|QUINTIC

'indep_var1',

'indep_var2'

EXPR

Enter a solver expression that represents the torque behavior.

Token: `expression`

Arguments

force_name: The variable name of an existing rotational action-only or action-reaction force pair.; Data type: varname
tx_l, ty_l, tz_l: Numbers, MDL expressions, or solver expressions that determine the values of the rotational force about the left X, Y, and Z axis.; Data type: real or string
tx_r, ty_r, tz_r: Numbers, MDL expressions, or solver expressions that determine the values of the rotational force about the right X, Y, and Z axis.; Data type: real or string
curve_name, AKIMA|CUBIC|LINEAR| QUINTIC, `indep_variable`: When using curve data, a curve, an interpolation method, and an independent variable must be specified, where curve_name is the variable name of an existing curve that represents the torque characteristic, the interpolation method can be set to AKIMA , CUBIC, LINEAR, or QUINTIC. The indep_variable is the solver expression representing the independent variable along which the torque curve is characterized.
spl3d name, AKIMA|CUBIC|LINEAR| QUINTIC, 'indep_var1', 'indep_var2': When using spline3d, a Spline3D entity, an interpolation method, and two independent variables must be specified, where spl3d_name is the variable name of an existing Spline3D entity that would represent the torque v/s two independent variables. The interpolation method can be set to AKIMA, CUBIC, LINEAR, or QUINTIC. indep_var1 is the solver expression for the first independent variable. indep_var2 is the solver expression that represents the second independent variable.
`expression`: A solver expression for the torque.

Example

Example 1

In the following example, the rotational force pair uses linear values for all except the TZ on the right side, which uses a solver expression. The left force TX uses a parametric expression that refers to a dataset.

*SetForce(frc_wc, ,LIN, ds.real1.value * ds.real2.value, 
LIN, 10.3, 
LIN, ds.real3.value,
LIN, 0.0, 
LIN, 0.0, 
EXPR, ‘100*sin(2*PI*TIME)‘)

Example 2

The following example shows usage of setting forces with different types. TY of the rotation force left uses a curve (with the Y displacements of the force markers as independent variable) and TY on the right side uses a spline3D (second independent variable is the velocity between force markers). TZ on the right uses a solver expression.

*SetForce(frc_wc, , LIN, ds.real1.value * ds.real2.value, 
CRV, crv_torq_y, AKIMA, `{frc_wc.l.DY}`,
LIN,ds.real3.value,
LIN,0.0, 
SPL3D, spl_torq_y, AKIMA, 
`{frc_wc.r.DY}`,`VY({frc_wc.r.i.idstring},
{frc_wc.r.j.idstring},{frc_wc.r.j.idstring})`,
EXPR,‘100*sin(2*PI*TIME)‘)

Context

Comments

The second argument (used to specify symmetry) is left empty when specifying asymmetric properties for a bushing pair.

To specify non-linear properties for the torque in any direction, a solver expression, curve data, or spline 3D data can be used. When using solver expressions, Templex syntax is used and all variables are enclosed in braces {} and the rest is treated as literal.

The QUINTIC interpolation method is supported for MotionSolve only.