*SetCoilSpring() - single coil spring

Sets the properties of a coil spring.

Syntax

*SetCoilSpring(spr_name, TYPE_k, TOKEN_k, 
                                  TYPE_c, TOKEN_c, 
                                  f, l)

Arguments

spr_name: The variable name of an existing coil spring.; Data type: varname
k: The stiffness coefficient of the coil spring.; Data type: real
c: The damping coefficient of the coil spring.; Data type: real
f: The load on the coil spring when it has a particular length.; Data type: real
l: The length of the coil spring when it has a particular load.; Data type: real
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 coil spring.

Example

*Body(b_lca, 
"LCA", 
p_lca_cm)
*Body(b_frame, 
"Frame", 
p_frame_cm)
*Point(p_spr_upr, 
"Spring @ frame")
*Point(p_spr_lwr, 
"Spring @ lca")
*CoilSpring(spring_uca, 
"Coil Spring", 
b_lca, 
b_frame, 
p_spr_upr, 
p_spr_lwr)
*SetCoilSpring(spring_uca, 
1.000e+02, 
0.000e+00, 
0.000e+00, 
3.500e+02)
*CoilSpring( cspr, "Coil spring", b_frame, 
 b_lca, 
 p_spr_upr, 
 p_spr_lwr )
*Curve( crv_spr, "Spring rate")
*SetCoilSpring(cspr, crv_spr.interp(CUBIC, 
 `{cspr.DM} -235` ), 
 0, 
 0, 
 235)
*CoilSpring( dmp, "Damper", b_shk_upr, 
 b_shk_lwr, 
 p_shk_upr, 
 p_shk_lwr )
*Curve( crv_dmp, "Damping rate")
*SetCoilSpring(dmp, 0, `POLY({ dmp.VR }, 0, 0, 10, 0, 3)`, 
 0, 
 235)

Context

*BeginMdl()

*DefineAnalysis()

*DefineSystem()

Comments

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.