Description: Modal summation vector method option used in response spectrum analysis for calculating element results. When set to OFF, modal direct stresses, strains, and forces are summed and other result measures such as von Mises stress are derived from these summed values. When set to ON, all modal results measures are calculated and then summed. The ON setting may result in higher resource requirements and solution times. Note that the ON setting is required for NAVSEA 0908-LP-000-3010 conformance in DDAM analysis.
Option/Type: ON/OFF
Default: ON