Two-Way Radio User Manual

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SOLUTION TECHNIQUE
18.24
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SOLUTION TECHNIQUE: Specify alternative solution methods.
This option is used to specify the quasi-Newton m ethod instead of the standard New ton method for
solving nonlinear equations, to specify a separated solution schem e for
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COUPLED TEMPERATURE-
DISPLACEMENT and
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COUPLED THERMAL-ELECTRICAL procedures, or to specify that contact
iterations should be executed instead of regular severe discontinuity iterations.
Product: ABAQUS/Standard
Type: History data
Level: Step
References:
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“Fully coupled thermal-stress analysis,” Sectio n 6.5.4 of the ABAQUS An alysis User’s Manual
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“Coupled thermal-electrical analysis,” Section 6.6.2 of the ABAQUS Analysis User’s Manual
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“Contact iterations,” Section 7.1.2 of the ABAQUS Analysis User ’s Manual
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“Convergence criteria for nonlinear problems,” Section 7.2.3 of the ABAQUS Analysis U ser’s Manual
Required parameter:
TYPE
Set TYPE=QUASI-NEWTON to specify a quasi-Newton solution method.
Set TYPE=SEPARATED to specify that linearized equations for the individual fields in a
fully coupled procedure are to be decoupled and solved separately for each field. This option
can be specified only with the
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COUPLED TEMPERATURE-DISPLACEMENT and
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COUPLED
THERMAL-ELECTRICAL procedures.
Set TYPE=CONTACT ITERATIONS to specify that contact iterations should be executed
instead of regular severe discontinuity iteration s.
Optional parameter:
REFORM KERNEL
This parameter can be used only with TYPE=QUASI-NEWTON. Set this parameter equal to the
number of quasi-Newton iterations allowed before the kernel matrix is reformed. The default is
REFORM KERNEL=8.
18.24–1
ABAQUS Version 6.1 Module:
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