Ptdsf

Model Element

Class Name

Ptdsf

Description

Ptdsf defines a constraint of a point to a deformable surface. The point can only move by sliding on the deformable surface. The surface can deform because of the loads acting on it. This is an instance of a higher pair constraint.

Attribute Summary

Name	Property	Modifiable by command?
id	Int ()
label	Str ()	✓
dsurface	Reference ("Surface")	✓
i	Reference ("Marker")	✓
active	Bool ()	✓

Usage

Ptdsf (i=objMarker, dsurface=objDeformSurface, optional_attributes)

Attribute Description

Reference to an existing Marker

Defines the marker whose origin is the point.

The attribute i is mandatory.

dsurface

Reference to an existing deformable surface

Defines the deformed surface to be used in this constraint

The attribute dsurface is mandatory.

Integer

Specifies the element identification number. This number must be unique among all the Ptdsf objects in the model.

This attribute is optional. MotionSolve will automatically create an ID when one is not specified.

Range of values: id > 0

label

String

Specifies the name of the Ptdsf object.

This attribute is optional. When not specified, MotionSolve will create a label for you.

active

Bool

Select one from True or False.

•	True indicates that the element is active in the model and it affects the behavior of the system

•	False indicates that the element is inactive in the model and it does not affect the behavior of the system. It is almost as if the entity was removed from the model, of course with the exception that can be turned “ON” when desirable.

The attribute active is optional. When not specified, active defaults to True

Comments

1.	See Properties, for an explanation about what properties are, why they are used and how you can extend these.

2.	For a more detailed explanation about PTDSF, see the Comments in the XML syntax section.

Example

1.	Create a PTDSF.

# Create the I marker and deformable Surface. Then refer to it in the PTdSF

iMark = Marker (body=p2, qp=[1,2,3], zp=[4,5,6], label="iMark")

# Data points for surface (closed in both U and V)

theData = [ [m11, m12, m13, m14, m15, m16, m11],

[m21, m22, m23, m24, m25, m26, m21],

[m31, m32, m33, m34, m35, m36, m31],

[m41, m42, m43, m44, m45, m46, m41],

[m51, m52, m53, m54, m55, m56, m51],

[m61, m62, m63, m64, m65, m66, m61],

[m71, m72, m73, m74, m75, m76, m71],

[m81, m82, m83, m84, m85, m86, m81],

[m11, m12, m13, m14, m15, m16, m11] ]

# Create the deformable surface

dSurface = Deformablesurface (markers=theData, uclosed=True, vclosed=True, label=”dSurface”)

# Finally, create the deformable surface

thePtdsf = Ptdsf (i=iMark, dsurface= dSurface, label=”thePtdsf”)