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Applications where time history dynamic analysis can be beneficial are analysis of waterhammer or steamhammer fluid transient loads, analysis of piping pulsations loads from reciprocating equipment (sinusoidal time history loading), seismic ground motion accelerations, blast loads, unbalanced vibrating machinery loads (sinusoidal time history), and relief valve openings. Use of static load factors such as DLF or static G accelerations to approximate dynamic loading behavior may be a questionable approach in some designs with design results compared to results from more realistic nonlinear time history analyses to assess the economic and safety consequences of one approach vs the other.
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