*SetTorsionSpring() - asymmetric torsion spring pair
Sets the properties of an asymmetric torsion spring pair.
Syntax
*SetTorsionSpring(spr_name, , TYPE_k_l, TOKEN_k_l
TYPE_c_l, TOKEN_c_l
f_l, l_l,
TYPE_k_r, TOKEN_k_r
TYPE_c_r, TOKEN_c_r
f_r, l_r)
Token
- LIN
- Enter a value for: k_l, c_l, k_r, c_r
- CRV
- Use a curve to represent the torsion spring behavior. See Comments.
- SPL3D
- Use a Spline3D to represent the torsion spring behavior. See Comments.
- EXPR
- Enter a solver expression that represents the torsion spring behavior.
Arguments
- spr_name
- The variable name of an existing torsion spring pair.
- k_l
- The stiffness coefficient of the left torsion spring.
- c_l
- The damping coefficient of the left torsion spring.
- f_l
- The load on the left torsion spring when it has a particular angle.
- l_l
- The angle of the left torsion spring when it has a particular load.
- k_r
- The stiffness coefficient of the right torsion spring.
- c_r
- The damping coefficient of the right torsion spring.
- f_r
- The load on the right torsion spring when it has a particular angle.
- l_r
- The angle of the right torsion spring when it has a particular load.
- 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`
- An expression for the torsion spring token.
Example
*PointPair(p_bar_mnt_left, "Bar mnt left")
*PointPair(p_bar_mnt_right, "Bar mnt right")
*BodyPair(b_bar_left, "Bar left", p_bar_left_cg)
*BodyPair(b_bar_right, "Bar right", p_bar_right_cg)
*TorsionSpringPair(tspr, "Torsion spring",
b_bar_left,
b_bar_right,
p_bar_mnt_left,
p_bar_mnt_right)
*SetTorsionSpring(spring_uca, ,
1.000e+02, 0.000e+00, 0.000e+00, 3.500e+02, 1.100e+02, 0.000e+00,
0.000e+00, 3.400e+02)
*TorsionSpringPair( spr_tbar, "Torsion bar",
b_upr,
b_lwr,
p_upr,
p_lwr)
*SetTorsionSpring(spr_tbar, , `-POLY({ spr_tbar.l.AZ },
0, 0, 10, 30)`,
1000,
0,
0,
`-POLY({ spr_tbar.r.AZ },
0, 0, 10, 30)`,
1000,
0,
0)
Context
Comments
The second argument (used to specify symmetry) is left empty when specifying asymmetric properties for a torsion spring pair.
Nonlinear properties can be specified only for asymmetric torsion spring pairs.
To specify non-linear properties for the torsion spring in any direction, a solver expression or 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.