*SetForce() - translational and rotational

Sets the values for a translational and rotational action-only or action-reaction force.

Syntax

*SetForce(force_name, TYPE_fx, TOKEN_fx, 
                                TYPE_fy, TOKEN_fy, 
                                TYPE_fz, TOKEN_fz, 
                                TYPE_tx, TOKEN_tx, 
                                TYPE_ty, TOKEN_ty, 
                                TYPE_tz, TOKEN_tz)

Token

If you select this TYPE, use this TOKEN

LIN

Enter a value for fx, fy, fz, tx, ty, and tz.

Token: Value

CRV

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

Token: curve_name,

AKIMA|CUBIC|LINEAR|QUINTIC,

`indep_variable`

SPL3D

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

Token: spl3d_name,

AKIMA|CUBIC|LINEAR|QUINTIC

'indep_var1',

'indep_var2'

EXPR

Enter a solver expression that represents the force/torque behavior.

Token: `expression`

Arguments

force_name: The variable name of an existing translational and rotational action-only or action-reaction force.; Data type: varname
fx, fy, fz: Numbers, MDL expressions, or solver expressions that determine the values of the translational X, Y, and Z components of the force.; Data type: real or string
tx, ty, tz: Numbers, MDL expressions, or solver expressions that determine the values of the rotational force about the 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 force/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 force/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 force/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 force/torque.

Example

*BodyPair(b_wheel, "Wheel body")
*BodyPair(b_wheel, "Wheel body")
*PointPair(p_wc, "Wheel center")
*ActionOnlyForce(frc_wc, 
 "Applied force on left wheel center", 
 TRANS_ROT, 
 b_wheel.l, 
 p_wc.l)
*SetForce(frc_wc, LIN, ds1.real1.value*ds1.real2.value, 
 LIN, 10.3, 
 LIN, ds1.real3.value, 
 LIN, ds2.real1.value, 
 LIN, ds2.real2.value, 
 LIN, ds2.real3.value)
*SetForce( frc_trans_rot, LIN, 12, 
CRV, crv_frc, AKIMA , `{frc_asym.l.DY}`, 
EXPR, `100*sin(2*PI*TIME)`, 
SPL3D, spl3d_frc_ax, CUBIC, `{frc_asym.l.AX}`, 
LIN, 13, 
EXPR, `1000*sin(2*PI*TIME)`)

Context

*BeginMdl()

*DefineAnalysis()

*DefineSystem()

Comments

To specify non-linear properties for the force in any direction, a solver expression or curve data can be used to compare the force. When using a solver expression, Templex syntax is used and all variables are enclosed in braces {} and the rest is treated as literal. To use curve data, a curve, interpolation method, and a independent variable must be specified, for example,

CRV, curve_name, AKIMA, `{DX}`

where curve_name is the variable name of an existing curve, interpolation method can be set to AKIMA, CUBIC or LINEAR and the independent variable is specified in Templex syntax.