显式Newmark法求解波动问题精度的探讨
Accuracy of Explicit Newmark Scheme for Wave Propagation Problems
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摘要: 本文对一维平面弹性波动问题,研究了预估-校正形式的显式Newmark积分格式求解精度。对工程中常见的平台型和升压平台型荷载作用下的波动问题,采用预估-校正形式的显式New-mark积分格式产生的数值阻尼技巧是提高有限元求解波动问题精度的一个有效方法。Abstract: The accuracy of 1-D elastic wave propagation problem by explicit Newmark scheme is studied. Numerical examples for stepped loading and triangular loading with rise time, shown that the proposed explicit Newmark scheme with numerical damping is an effective way to improve the accuracy of FEM for wave propagation problems.