哈尔滨工程大学学报2017，Vol.38Issue(6)：843-851,9.DOI:10.11990/jheu.201604002
含裂纹的直角域中凸起与衬砌的动态性能分析
Dynamic performance analysis of a salient and a lining in a quarter space with a crack
摘要
Abstract
To investigate the scattering of SH-wave caused by defects near a crack in a quarter space,the concentration of dynamic stress at the salient and lining near a crack in a quarter space was researched using the complex function method,mirror method,and crack incision method.The analytical expressions of dynamic stress concentration factor (DSCF) around the circular lining edge and dynamic stress intensity factor (DSIF) at the crack tip were obtained.Several calculations were plotted as examples to show the influences of the frequencies of incident wave,the physical constant of medium,and the geometry of structures on DSCF and DSIF.The calculations indicate that the influences of the frequencies of incident wave and length of crack on DSCF were obvious.When high frequency wave is incident,the maximum of DSCF will increase by 20% as compared with the case of low frequency wave.The increase in thickness of lining may not be able to decrease DSCF,and the frequency of incident wave exerts a great influence on surface displacement.Dynamic analysis of the quarter space with defects is critical.关键词
直角域/半圆凸起/圆形衬砌/直线裂纹/SH波/动应力集中系数(DSCF)/动应力强度因子(DSIF)Key words
quarter space/semi-circular salient/circular lining/linear crack/SH wave/dynamic stress concentration factor (DSCF)/dynamic stress intensity factor (DSIF)分类
数理科学引用本文复制引用
齐辉,张希萌,陈洪英,丁晓浩..含裂纹的直角域中凸起与衬砌的动态性能分析[J].哈尔滨工程大学学报,2017,38(6):843-851,9.基金项目
黑龙江省自然科学基金项目(A201404). （A201404）
