ROSE, SIGNIF, Label, TD, ForceType
Specifies the Rosenblueth mode combination method.
SIGNIFCombine only those modes whose significance level
exceeds the SIGNIF threshold. For single point, multipoint, or DDAM
response (SPOPT, SPRS, MPRS, or DDAM), the significance
level of a mode is defined as the mode coefficient of the mode, divided
by the maximum mode coefficient of all modes. Any mode whose significance
level is less than SIGNIF is considered
insignificant and does not contribute to the mode combinations. The
higher the SIGNIF threshold, the fewer the number of modes combined. SIGNIF defaults to 0.001. If SIGNIF is specified as
0.0, it is taken as 0.0.
LabelLabel identifying the combined mode solution output.
DISP | — | Displacement solution (default). Displacements, stresses, forces, etc., are available. |
VELO | — | Velocity solution. Velocities, "stress velocities," "force velocities," etc., are available. |
ACEL | — | Acceleration solution. Accelerations, "stress accelerations," "force accelerations," etc. are available. |
TDTime duration for earthquake or shock spectrum. TD defaults to 10.
Label identifying the forces to be combined:
STATIC | — | Combine the modal static forces (default). |
TOTAL | — | Combine the modal static plus inertial forces. |
For more information on spectrum analysis combination methods, see Combination of Modes
This command is also valid in PREP7.