FE-SBFE时域耦合波输入模型

将传统有限元与比例边界有限元耦合起来用以分析结构—地基动力相互作用，并通过子结构分析建立了一种纯时域波输入模型。为提高结构—地基相互作用力的计算效率，本文对无限地基单位脉冲响应函数做了分解—截断处理，而计算精度与效率之间的平衡可由事先给定的参数加以控制。通过计算半球形河谷在简谐P波入射时的散射问题，本文模型的正确性得到了验证。

A Seismic Excitation Model for FE-SBFE CouplingProcedure in Time Domain

A seismic excitation model of the coupling procedure of standard finite element and scaled boundary finite-element is proposed to achieve the unbounded soilstructure interaction analysis in time domain. The acceleration unit-impulse response function of unbounded soil is decomposed and then truncated to reduce the computational effort. With the prescribed tolerance parameter, the balance between accuracy and efficiency of the procedure can be controlled. The validity of the model is demonstrated via analyzing the diffraction of hemi-spherical canyon subjected to plane harmonic P wave incidence.