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MBPTDCV

MBPTDCV

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MBPTDCV

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Bulk Data Entry

MBPTDCV – Multi-body Point to Deformable Curve Constraint

Description

Defines a Point to Deformable Curve Constraint.

Format

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MBPTDCV

JID

GID

DCID

 

 

 

 

 

 

hmtoggle_plus1Example

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MBPTDCV

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Field

Contents

JID

Joint identification number.

No default (Integer > 0)

GID

Grid identification number corresponding to the point which is sliding on the deformable curve.

No default (Integer > 0)

DCID

Deformable curve (MBDCRV) identification number.

No default (Integer > 0)

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:

mbptdsf_comment_1

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

2.The MBPTDCV element is not supported by the Force Imbalance method of static equilibrium.
3.In most cases, the interpolation produces a smooth curve but in some cases, it produces a curve that wiggles too much. In those cases, the TENSION parameter may be specified to smooth out the wiggles in the curve. A TENSION value of unity is a good first guess. After that, higher values of TENSION may be tried, if necessary.
4.The deformable element itself does not possess any inherent inertia, stiffness or damping properties. You must include other modeling elements to capture those effects.

See Also:

Bulk Data Section

Guidelines for Bulk Data Entries

The Input File