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DOPTPRM, BARCON

DOPTPRM, BARCON

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DOPTPRM, BARCON

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Parameter

Values

Description

BARCON

<REQUIRED or  EXTENDED>

Default = REQUIRED

Controls the internal constraints of PBARL and PBEAML properties during optimization.

REQUIRED:

A required set of constraints are applied. This option prevents situations that are geometrically infeasible. This option is usually sufficient (and is the default), provided that positive lower bounds are specified on the design variables corresponding to the bar dimensions.

EXTENDED:

Applies an extended set of constraints. This option also enforces positive dimensions (constrains the various dimensions of the properties to be greater than zero) in addition to the set of constraints applied by the REQUIRED option.

Note

1.REQUIRED is usually sufficient (and is the default), provided that positive lower bounds are specified on the design variables corresponding to the bar dimensions. However, if such positive lower bounds are not set, the EXTENDED option can be used, which may introduce a large number of constraints with minimal benefit.

2.  Example:

For PBARL/PBEAML (TYPE = BOX), we have the following constraint options:

REQUIRED: DIM1 > 2*DIM4 and DIM2 > 2*DIM3

EXTENDED: DIM3 > 0 and DIM4 > 0 (in addition to constraints defined by REQUIRED)