Two-Way Radio User Manual

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MODAL DYNAMIC
13.11
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MODAL DYNAMIC: Dynamic time history analysis using modal superposition.
This option is used to provide dy namic time history response a s a linear perturbation procedure using modal
superposition.
Product: ABAQUS/Standard
Type: History data
Level: Step
Reference:
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“Transient modal dynamic analysis,” Section 6.3.7 of the ABAQUS Analysis User’s Manual
Optional parameter:
CONTINUE
Set CONTINUE=NO (default) to specify that this step is not to carry over the initial conditions
from the results of the preceding step. In this case the initial displacem ents are zero, and the initial
velocities are taken from the
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INITIAL COND ITIONS, TYPE=VELOCITY option if it is used;
otherwise, they are zero. Step time begins at zero.
Set CONTINUE=YES to specify that this step is to carry over the initial conditions from the
end of the immediately preceding
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MODAL DYNAMIC step or static per turbation step. If this
preceding step is a
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MODAL D YNA MIC step, both the velocities and the displacements from
the end of this step are used as the initial conditions for the current step. If this preceding step is
a static perturbation step, the displacements from this step are used as the initial displacements
for the current step and the initial velocities are taken from the
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INITIAL CONDITIONS,
TYPE=VELOCITY option if it is used; otherwise, they are zero. Step time is continued from the
imm ediately preceding
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MODAL DYNAMIC or static perturbation step.
Data line for a transient modal dynamic analysis:
First (and only) line:
1. Time increment to be used.
2. Time period.
13.11–1
ABAQUS Version 6.1 Module:
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