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MBDCRV

MBDCRV

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MBDCRV

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Bulk Data Entry

MBDCRV – Multi-body Deformable Curve

Description

Defines an ordered list of grids as a Multi-body Deformable Curve.

Format

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

(9)

(10)

MBDCRV

DCID

ENDTYPEL

LAMBDAL

ENDTYPER

LAMBDAR

NSEG

 

 

 

 

G1

G2

G3

 

 

 

 

 

hmtoggle_plus1Example

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

(9)

(10)

MBDCRV

1

NATURAL

 

CANTILEVER

0.5

100

5

 

 

 

201

202

203

204

205

 

 

 

 

Field

Contents

DCID

Curve identification number.

No default (Integer > 0)

ENDTYPEL

Select from NATURAL, PARABOLIC, PERIODIC and CANTILEVER. See comment 1.

Default = NATURAL

LAMBDAL

This parameter is only applicable for CANTILEVER type end condition. It should be left blank for other end conditions.

A real valued parameter in the interval [0,1] that controls the left end condition for CUBIC spline interpolation. A value of 0 implies NATURAL end condition while a value of 1 implies PARABOLIC end condition.

Default = 0.0 (0.0 < Real < 1.0)

ENDTYPER

Select from: NATURAL, PARABOLIC, PERIODIC and CANTILEVER.  See comment 1.

Default = NATURAL

LAMBDAR

This parameter is only applicable for CANTILEVER type end condition. It should be left blank for other end conditions.

A real valued parameter in the interval [0,1] that controls the left end condition for CUBIC spline interpolation. A value of 0 implies NATURAL end condition while a value of 1 implies PARABOLIC end condition.

Default = 0.0 (0.0 < Real < 1.0)

NSEG

Number of segments used to visualize the deformable curve in animation.

No default (Integer > 0)

G1, G2, G3, …

Ordered list of grid IDs defining the curve.

Comments

1.The deformable curve is generated using the CUBIC spline interpolation which requires assumptions on the second derivative of the interpolating function at either end of the curve. The keywords NATURAL, PARABOLIC, PERIODIC and CANTILEVER represent the four standard assumptions defined as follows:

mbdcrv_comment_1

Note that λ =0.0 implies NATURAL (or free) end conditions and λ =1.0 implies PARABOLIC end conditions.

2.This card is represented as a set in HyperMesh.

See Also:

Bulk Data Section

Guidelines for Bulk Data Entries

The Input File