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Viscoelastic Boundary Conditions for Multiple Excitation Sources in the Time Domain

机译：时域中多个激励源的粘弹性边界条件

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摘要

Transmitting boundaries are important for modeling the wave propagation in the finite element analysis of dynamic foundation problems. In this study, viscoelastic boundaries for multiple seismic waves or excitations sources were derived for two-dimensional and three-dimensional conditions in the time domain, which were proved to be solid by finite element models. Then, the method for equivalent forces' input of seismic waves was also described when the proposed artificial boundaries were applied. Comparisons between numerical calculations and analytical results validate this seismic excitation input method. The seismic response of subway station under different seismic loads input methods indicates that asymmetric input seismic loads would cause different deformations from the symmetric input seismic loads, and whether it would increase or decrease the seismic response depends on the parameters of the specific structure and surrounding soil.
机译：传输边界对于动态基础问题的有限元分析中的波传播建模非常重要。在这项研究中，在时域的二维和三维条件下，导出了多个地震波或激励源的粘弹性边界，并通过有限元模型证明了该边界是牢固的。然后，还描述了当采用建议的人工边界时，等效力输入地震波的方法。数值计算和分析结果之间的比较验证了这种地震激励输入法。地铁车站在不同地震荷载输入方法下的地震响应表明，非对称输入地震荷载会引起与对称输入地震荷载不同的变形，是否增加或减小地震响应取决于具体结构和周围土壤的参数。 。

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