Abstract
In engineering, solving divergence and long solving time often occurs when solving large complex dynamic equations. Comparative analysis of Newmark and Rungekutta method fora complex dynamic model can provide a theory basis for the selection of numerical integration method when solving complex dynamic equation. The comparative analysis on the solving precision and solving time by Newmark method and Rungekutta method for calculating a same complex dynamic equation is carried out. The calculation results show that the response results by these two methods are in strong consistency. But the Newmark method shortens the solving time by at least 3 orders comparing that of Rungekutta method. Furthermore, the response displacement by Newmark method in different integration steps is obtained. The results indicate that the response results become stable with integration step continues reducing under 0.1.
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