计算力学学报2019，Vol.36Issue(1)：117-123,7.DOI:10.7511/jslx20170613001
各向异性对半圆形河谷散射影响的数值分析
Research of the influence of anisotropic media to the wave scattering of semi-circular canyon
摘要
Abstract
A substructure replacement technique is proposed to investigate the effect of the anisotropy on the wave scattering and diffraction of a semi-circular canyon.By introducing an arbitrary auxiliary boundary, the scattering problem is solved as a simple radiation one.Based on the substructure technique, the half-space is truncated into two parts, namely, the near field enclosing all surface irregularities and the far field with regular boundaries.The scaled boundary finite element method (SBFEM) is applied to obtain the dynamic impedance of the far field and an analytical solution of wave motion of the anisotropic free-filed is used as the input wave.The accuracy and effectiveness of the proposed method are validated by comparing the results with those of extending studies.Finally, the effect of elliptic anisotropy and non-elliptic anisotropy on the wave scattering of a semi-circular canyon is investigated.Numerical examples show that the anisotropy of half-space greatly affect the spatial distribution of the scattering wave field.关键词
各向异性/半圆形河谷/qP波/比例边界有限元/子结构法Key words
anisotropy/semi-circular canyon/qP wave/SBFEM/substructure technique分类
数理科学引用本文复制引用
李志远,李建波,林皋..各向异性对半圆形河谷散射影响的数值分析[J].计算力学学报,2019,36(1):117-123,7.基金项目
国家重点研发计划 (2016YFB0201000) （2016YFB0201000）
国家自然科学基金委创新研究群体基金 (51421064) （51421064）
中央高校基本科研业务费 (DUT17LK16) （DUT17LK16）
