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Time-history responses on the surface by regularly distributed enormous embedded cavities:Incident SH-waves

Earthquake Science 2018年第3期31卷 137-153页

作者： Mehdi Panji Saeed Mojtabazadeh Hasanlouyi Department of Civil Engineering Zanjan Branch Islamic Azad University

The time-history responses of the surface were obtained for a linear elastic half-plane including regularly distributed enormous embedded circular cavities subjected to propagating obliquely incident plane SH-waves. An advanced numerical approach named half-plane time-domain boundary element method（BEM）, which only located the meshes around the cavities, was used to create the model. By establishing the modified boundary integral equation（BIE）independently for each cavity and forming the matrices, the final coupled equation was solved step-by-step in the timedomain to obtain the boundary values. The responses were developed for a half-plane with 512 cavities. The amplification patterns were also obtained to illustrate the frequencydomain responses for some cases. According to the results,the presence of enormous cavities affects the scattering and diffraction of the waves arrived to the surface. The introduced method can be recommended for geotechnical/mechanical engineers to model structures in the fields of earthquake engineering and composite materials.

关键词： circular cavities half-plane BEM time-history res- ponse SH-wave time-domain wave propagation

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