Fast Algorithm for Stationary Stochastic Response Subjected to Multi-component Multi-support Seismic Excitation
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摘要: 为了解决多分量多点激励作用下大跨度桥梁平稳随机响应的计算问题,在单分量虚拟激励法的基础上,提出了多分量多点地震激励下计算大跨度桥梁平稳随机响应的虚拟激励法.理论证明,该法具有与经典随机振动理论精确解相同的精度,而计算速度比经典随机振动理论快10倍,且可方便地计入行波效应或部分相干效应.Abstract: To calculate the stationary stochastic response of a long-span bridge subjected to multi-component and multi-support seismic excitation,a pseudo-excitation method was proposed based on the single-component pseudo-excitation method.Theoretic analyses show that this pseudo-excitation method has the same accuracy as the classic stochastic vibration method,but calculation rate of the former is 10 times faster than that of the latter,and the traveling wave effect and partial correlation effect can be included easily.
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