During nonlinear analysis, time values are reported for various phases of the numerical formulation, listed as follows:
TIME FOR INITIALIZING ANALYSIS = 12.91
TIME FOR CONTROLLING ANALYSIS = 895.74
TIME FOR FORMING STIFFNESS MATRIX = 922.40
TIME FOR SOLVING STIFFNESS MATRIX = 431.23
TIME FOR CALCULATING DISPLACEMENTS = 642.98
TIME FOR DETERMINING EVENTS = 395.76
TIME FOR UPDATING STATE = 17134.01
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TOTAL TIME FOR THIS ANALYSIS = 20435.03
Each of these phases is described as follows:
- Time for initializing analysis is the time used to set up the analysis. This time is considered to be overhead.
- Time for controlling analysis is the time used for all analysis operations which are not associated with forming or solving the stiffness matrix, calculating displacement, determining events, and updating state. This time may include calculating load, determining step size and convergence, and other operations which may differ depending upon the analysis application.
- Time for forming stiffness matrix
- Time for solving stiffness matrix
- Time for calculating displacements
- Time for determining events is the time used for the event-to-event solution strategy, in which the size of the load step necessary to cause an event in each structural object is determined. Events are significant changes in nonlinear behavior. To reduce this computational time, consider removing the unnecessary nonlinearity assigned to systems which will remain elastic. Events are primarily used for frame hinges.
- Time for updating state is the time used to determine the effect of a calculated load step upon all structural objects within a model. Examples include current internal state and resisting forces. To reduce this computation time, consider removing the unnecessary nonlinearity assigned to systems which will remain elastic. Further, if the model has nonlinear links or shell plasticity, the number of points on the force-displacement or stress-strain curves may be reduced.