一种分析层状介质—结构相互作用的多元耦合模型

从全空间频域动力基本解出发，考虑到层状介质中多种波成分的存在，提出了一种可以同时传递Ｐ波和ＳＶ波的动力无穷元，并与文中提出的一种具有面力衰减特性的动力无限边界元耦合，建立了层状介质—结构动力相互作用问题的无穷元（ＩＦＥ）—无限边界元（ＩＢＥ）—有限元（ＦＥ）—边界元（ＢＥ）耦合模型。该模型在分析层状介质—结构相互作用时，具有以下优点：回避了复杂的层状介质基本解，可以考虑波的斜入射。数值计算结果表明了所提出的耦合模型对分析层状介质上结构的动力响应具有良好的计算精度。

Plurality coupling model for layered soil structure interaction analysis

To simulate the multi wave propagation in the far field of layered soil, a new kind of infinite element based on the asymptotic behavior of the frequency domain dynamic fundamental solutions of full elastic space is presented. It can simulate the propagation of P and SV wave in the far field simultaneously and is coupled with a kind of infinite boundary element with traction decay shape functions. A hybrid model of finite element boundary element infinite element infinite boundary element, which can simulate layered soil structure system, is also presented. This couple model does not need any fundamental solution of layered medium and can analyze the effects of incline wave incident. The numerical results verify the accuracy of the couple model in layered soil structure interaction analysis.