*CurveToSurfaceJoint()

Creates a curve-to-surface high-pair joint with three rotational degrees of freedom and two translational degrees of freedom.

Syntax

*CurveToSurfaceJoint(cvsf_name,"cvsf_label",body_1, body_2, curve, surface, ref_marker_1, ref_marker_2, [icm_1], [icm_2], [ALLOW_COMPLIANCE])

Arguments

cvsf_name: The variable name of the curve-to-surface joint.; Data type: varname
cvsf_label: The label of the curve-to-surface joint.; Data type: label
body_1: The first body constrained by the curve-to-surface joint.; Data type: Body
body_2: The second body constrained by the curve-to-surface joint.; Data type: Body
curve: The curve on body_1 that is constrained to the surface on body_2 .; Data type: Curve
surface: The surface on body_2 that is constrained to the point on body_1 .; Data type: Surface
ref_marker_1: Reference marker to which the curve data is defined.; Data type: Marker
ref_marker_2: Reference marker to which the surface data is defined.; Data type: Marker
icm_1: An optional argument for the reference marker of the initial condition information for the point of contact on the curve. If not used, the initial condition information is defined with respect to the reference marker.; Data type: Marker
icm_2: An optional argument for the reference marker of the initial condition information for the point of contact on the surface. If not used, the initial condition information is defined with respect to the reference marker.; Data type: Marker
ALLOW_COMPLIANCE: An optional argument that indicates the joint can be made compliant.

Example

*BeginMDL(the_model, "Example CurveToSurfaceJoint")
 *Marker(mrk_0, "Ref marker for the curve")
 *Marker(mrk_1, "Ref marker for the surface")
 *Marker(mrk_2, "ICM marker 1")
 *Marker(mrk_3, "ICM marker 2")
 *Body(bd_0, "First Body")
 *Body(bd_1, "Second Body")
 *Curve(crv_0, "Curve on body 1", WRITE, CURVE_POINTS, CLOSED)
 *Surface(surf_1, "Surface on body 2", UOPEN, VOPEN)
 
 *CurveToSurfaceJoint(cvsf_0, "cvsf", bd_0, bd_1, crv_0, surf_1, mrk_0, mrk_1, mrk_2, mrk_3)
*EndMDL()

Context

*BeginMdl()

*DefineAnalysis()

*DefineSystem()

Properties

Table 1.
Property	Returns Data Type	Description
b1	Body	The first body constrained by the curve-to-surface joint.
b2	Body	The second body constrained by the curve-to-surface joint.
crv	Curve	The curve on b1 that is constrained to b2.
i	Marker	The "i" marker in the case of a compliant joint.
icm_1	Marker	The optional reference marker for the initial conditions of the point of contact on the curve.
icm_2	Marker	The optional reference marker for the initial conditions of the point of contact on the surface.
ic_use_xyz_1	boolean	Denotes if the displacement initial conditions are to be used for the point of contact on the curve (TRUE or FALSE).
ic_use_xyz_2	boolean	Denotes if the displacement initial conditions are to be used for the point of contact on the surface (TRUE or FALSE).
ic_x_disp_1	real	The value of the initial displacement of the point of contact in the icm x direction on the curve. This is applied during the assembly phase of the solver.
ic_x_disp_2	real	The value of the initial displacement of the point of contact in the icm x direction on the surface. This is applied during the assembly phase of the solver.
ic_y_disp_1	real	The value of the initial displacement of the point of contact in the icm y direction on the curve. This is applied during the assembly phase of the solver.
ic_y_disp_2	real	The value of the initial displacement of the point of contact in the icm y direction on the surface. This is applied during the assembly phase of the solver.
ic_z_disp_1	real	The value of the initial displacement of the point of contact in the icm z direction on the curve. This is applied during the assembly phase of the solver.
ic_z_disp_2	real	The value of the initial displacement of the point of contact in the icm z direction on the surface. This is applied during the assembly phase of the solver.
id	integer	Solver input deck identification number.
id_string	string	The ID represented as a string.
isbush	boolean	See ^Comments^ below.
label	string	The descriptive label of the curve-to-surface joint.
j	Marker	The "j" marker in the case of a compliant joint.
jfloat	Marker	The floating marker on b2.
joint_i	Marker	The "i" marker for the non-compliant joint.
joint_j	Marker	The "j" marker for the non-compliant joint.
note	string	The note on the entity.
num	integer	The unique identification number within MDL.
rm1	Marker	The reference marker of the curve.
rm2	Marker	The reference marker of the surface.
state	boolean	Control state (TRUE or FALSE). This parameter is read only and cannot be directly changed by the user (see ^user_state^).
surf	Surface	The surface on b2 which is constrained to b1.
type	string	The unique joint type.
user_state	boolean	The state that can be set by the user (TRUE, FALSE).
varname	string	The variable name of the curve-to-surface joint.

Comments

The curve-to-surface joint provides five degrees of freedom: three rotational at the instantaneous point of contact and two translational DOF.

The ALLOW_COMPLIANCE argument is optional. When it is included, it indicates that the joint can be made compliant. In compliant mode, such a joint acts as a bushing.

The "isbush" property is valid only for joints that can be made compliant. When "isbush" is set to FALSE, the joint acts like a kinematic joint (in non-compliant mode). When "isbush" is set to TRUE, the joint acts like a bushing (in compliant mode). When the compliant option in a system is switched to "non-compliant", all the joints in the system act as kinematic joints. However, when the system option is switched to "compliant", only the joints that are created with an ALLOW_COMPLIANCE flag act as bushings. The rest of the joints continue to behave as kinematic joints.