*SetForce() - asymmetric line of action
Sets the value for an asymmetric line of action action-reaction force pair.
Syntax
*SetForce(force_name, , TYPE_f_l, TOKEN_f_l,
TYPE_f_r, TOKEN_f_r,)
Token
- LIN
- Enter a value for f_l and f_r.
- CRV
- Use a Curve to represent the force behavior.
- SPL3D
- Use a Spline3D to represent the force behavior.
- EXPR
- Enter a solver expression that represents the force behavior.
Arguments
- force_name
- The variable name of an existing action-reaction force pair of type LOA.
- 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 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 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 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.
Example
Example 1
*SetForce(f1, , LIN, 30.0, LIN, ds.real1.value +
ds.real2.value)
Example 2
*SetForce(f2, ,CRV, crv_force, AKIMA,‘DM({f2.l.i.id},
{f2.l.j.id})‘, CRV,crv_force, AKIMA,‘DM({f2.r.i.id}, {f2.r.j.id})‘)
Example 3
*SetForce(f3, ,SPL3D, spl_force, CUBIC,‘DM({f3.l.i.id},
{f3.l.j.id})‘, ,‘VR({f3.l.i.id}, {f3.l.j.id})`,
SPL3D, spl_force, CUBIC,‘DM({f3.r.i.id}, {f3.r.j.id})‘, ,
‘VR({f3.r.i.id}, {f3.r.j.id})` )
Example 4
*SetForce(f4, ,EXPR, ‘100.0*DM({f4.l.i.id, %d},
{f4.l.j.id, %d})‘, EXPR, ‘100.0*DM({f4.r.i.id, %d}, {f4.r.j.id, %d})‘)
Example 5
*SetForce(f5, ,CRV, crv_force2, AKIMA,‘DM({f5.l.i.id},
{f5.l.j.id})‘, EXPR, ‘100.0*DM({f5.r.i.id, %d},
{f5.r.j.id, %d})‘)
Context
Comments
The symmetry argument is empty when using a force with asymmetric line of action.
To specify non-linear properties for the force 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.