CSiPlnat CSiPlant offers linear and nonlinear time history dynamic analysis using using either modal or direct-integration methods with . There is no practical limit on the number of time history cases which can be analyzed or the size of the time history functions. Time history cases can be load sequenced to continue from the end state of a nonlinear load case.
Modal time history cases typically run faster than direct integration load cases and they are not as sensitive to time step size. Although nonlinear modal time history cases can account for nonlinear boundary conditions (gaps, friction, 1-way supports, etc.), nonlinear modal cases do not account for nonlinear P-delta effects. Modal time history cases can only be load sequenced after another nonlinear modal time history case.
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6. On the left side of the time history load case dialogue under Properties, users will find options to specify load sequencing using the 'Continue from End state of' field, an option to select a mass source, and option to specify P-delta if it's a nonlinear direct integration time history case.
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