Time-history analysis provides for linear or nonlinear evaluation of dynamic structural response under loading which may vary according to the specified time function. Dynamic equilibrium equations, given by K u(t) + C d/dt u(t) + M d2/dt u(t) = r(t), are solved using either modal or direct-integration methods. Initial conditions may be set by continuing the structural state from the end of the previous analysis. Additional notes include:

See Also

*Related Email:* * [7/14/2010 email from bm: Impact of time-step size (relative to modal periods) on results|$3145753] *Related Incident:* * 26167: Explains reason for inconsistent results for acceleration time-history input and displacement time-history input