PARAM, COUPMASS

Bulk Data Entry Use coupled mass matrix approach for eigenvalue/dynamic analysis.

Parameter	Values	Description
COUPMASS	<-1, 0, 1, YES, or NO>	-1 The lumped mass matrix approach is used for eigenvalue/dynamic analysis. 0 The lumped mass matrix approach is used for eigenvalue/dynamic analysis. 1 The coupled mass matrix approach is used for eigenvalue/dynamic analysis. YES The coupled mass matrix approach is used for eigenvalue/dynamic analysis. NO (Default) The lumped mass matrix approach is used for eigenvalue/dynamic analysis.