Dsurface/DeformableSurface

Model ElementDsurface defines a deformable surface in MotionSolve. It is referred to by PTDSF and PTDSFF.

Class Name

Dsurface or DeformableSurface

Attribute Summary

Name Property Modifiable by command? Designable?
id Int ()    
label String () Yes  
end_type Enum ("NATURAL PARABOLIC PERIODIC", default="NATURAL")    
markers Reference (Marker, count=0)   Yes
u_span Double (1.0) Yes  
v_span Double (1.0) Yes  
u_tension Double () Yes  
v_tension Double () Yes  
u_closed Bool ()    
v_closed Bool ()    
active Bool () Yes  

Usage

Dsurface (markers=objMatrix, optional_attributes)

Attributes

markers
Matrix of Marker objects
Specifies a matrix of Markers. The origins of these Markers define the deformable surface. The Markers in the matrix are to be organized as shown in the image below.

The markers attribute is mandatory.
id
Integer
Specifies the element identification number. This number must be unique among all the Dsurface 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 Dsurface object.
This attribute is optional. When not specified, MotionSolve will create a label for you.
end_type
String
Defines the end type of this deformed surface. Select one from NATURAL, PARABOLIC, PERIODIC or CANTILEVER. See Comment 8 for more details.
This attribute is optional.
Default = NATURAL
u_span
Double
Specifies the range of the u parameter for the deformable surface. During simulation, MotionSolve will ensure that u_span/2 ≤ u ≤ + u_span/2
This attribute is optional.
u_span > 0.0
Default = 1.0
v_span
Double
Specifies the range of the v parameter for the deformable surface. During simulation, MotionSolve will ensure that v_span/2 ≤ v ≤ + v_span/2
This attribute is optional.
v_span > 0.0
Default = 1.0
u_closed
A Boolean value (True or False) that determines whether the markers that define the curves are closed in u or not.
v_closed
A Boolean value (True or False) that determines whether the markers that define the curves are closed in v or not.

Examples

  1. Create a deformed surface with a minimum number of attributes.
    mkrMatrix = [ [m11, m12, m13, m14, m15, m16, m17, m11],
[m21, m22, m23, m24, m25, m26, m27, m21],
[m31, m32, m33, m34, m35, m36, m37, m31],
[m41, m42, m43, m44, m45, m46, m47, m41],
[m51, m52, m53, m54, m55, m56, m57, m51],
[m61, m62, m63, m64, m65, m66, m67, m61],
[m71, m72, m73, m74, m75, m76, m77, m71],
[m11, m12, m13, m14, m15, m16, m17, m11] ]

Dsurface (markers=mkrmatrix))
The following default properties are automatically provided:
  • end_type = NATURAL
  • u_span = 1.0
  • v_span = 1.0
  • uclosed = True (first and last columns are the same)
  • vclosed = True (first and last rows are the same)

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 Dsurface, see Reference: Deform Surface.