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Modal time history cases typically run faster than direct integration load cases and are not as sensitive to time step size. Although nonlinear modal time history cases can account for nonlinear boundary conditions (gaps, friction, 1one-way supports, etc.), nonlinear modal time history 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 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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