Two-Way Radio User Manual

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IMPERFECTION
9.3
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IMPERFECTION: Introduce geometric imperfections for postbuckling analysis.
This option is used to introduce a geometric imperfection into a model for a postbuckling analysis.
Products: ABAQUS/Standard ABAQUS/Explicit
Type: Model data
Level: Model
References:
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“Introducing a geometric imperfection into a m odel,” Section 11.3.1 of the ABAQUS Analysis User ’s
Manual
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“Unstable collapse and postbuckling analysis,” Section 6.2.4 of the ABAQ US Analysis U ser’s Manual
•
“Eigenvalue buckling prediction,” Section 6.2.3 of the ABAQUS A nalysis User’s Manual
Optional parameters (mutually exclusive-if neither parameter is specified, ABAQUS assumes
that the imperfection data will be entered directly on the data lines):
FILE
Set this parameter equal to the name of the results file from a previous ABAQ US/Standard analysis
containing either the mode shapes from a
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BUCKLE or
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FREQUENCY analysis or the nodal
displacements from a
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STATIC analysis.
INPUT
Set this parameter equal to the name of the alternate input file containing the imperfection data, in
general, as the node number and imperfectio n values in the global coordinate system. See “Input
syntax rules,” Section 1.2.1 of the A BAQU S Analysis User’s Manual, for the syntax of such file
names.
Required parameter if the FILE parameter is used:
STEP
Set this parameter equal to the step num ber (in the analysis whose results file is being used as input
to this option) from which the modal or displacem ent data are to be read.
Optional parameters if the FILE parameter is used:
INC
Set this parameter equal to the increm ent number (in the analysis whose results file is being used as
input to this option) from which the displacem ent data are to be read. If this parameter is omitted,
ABAQUS will read the data from the last increment available for the specified step on the results
file.
9.3–1
ABAQUS Version 6.1 Module:
ID:
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