PARAM, RECOVER

Parameter

Values

Description

RECOVER

<LB, UB>

<LB, UB>:

They represent the Lower Bound (LB) and the Upper Bound (UB) of the frequencies between which the full-structure global mode shapes are requested instead of the modes of the condensed system generated during Component Mode Synthesis (CMS).

LB (real > 0.0, optional):

Mode shapes of the full-structure, at frequencies greater than “LB”, will be output to the .op2 file.

UB (real > 0.0, mandatory):

Mode shapes of the full-structure, at frequencies lower than “UB”, will be output to the .op2 file.

Note:

This parameter is used to extract only the global mode shape of the structure by filtering the local modes. The setup requires CMSMETH with GUYAN option and ASET. Also, the MODEL card needs to be set ALL. It is your responsibility to distribute ASET in a way that it can capture global mode shape nicely.

2.	Only .op2 file is supported for output.

3.	The following example implementations are incorrect and will result in an ERROR:

PARAM, RECOVER, 30.0, 20.0 (as UB < LB)
PARAM, RECOVER, ,0.0 (as UB0)

Defaults

1.	The mode shapes of the condensed system (only) generated during CMS are output when this parameter is not present in the deck.

2.	If PARAM, RECOVER is input without specifying a value, the program results in an ERROR.

3.	LB is optional and the default for LB is 0.0, if it is left blank.