地下圆形衬砌洞室对SV及Rayleigh波的动应力集中(II)：数值结果  

Dynamic stress concentration at an underground cylindrical lined cavern subject to incident plane SV waves and Rayleigh waves(Ⅱ):numerical results

作　　者：纪晓东[1,2] 梁建文[2] Vincent W Lee 

机构地区：[1]大连大学建筑工程学院,辽宁大连116622 [2]天津大学土木工程系,天津300072 [3]University of Southern California, CA 90089, USA

出　　处：《辽宁工程技术大学学报（自然科学版）》2011年第1期64-67,共4页Journal of Liaoning Technical University (Natural Science)

基　　金：国家自然科学基金资助项目(50378063);辽宁省教育厅高等学校科研计划基金资助项目(2008058)

摘　　要：为了解决在入射平面SV波和Rayleigh波作用下地下圆形衬砌洞室的动应力集中问题,利用文献[5]的级数解,分析了衬砌刚度、入射波长、入射角度诸因素对动应力集中系数(DSCF)的影响。数值结果表明:(1)衬砌刚度对DSCF有重要影响,柔性衬砌情况DSCF最小,刚性衬砌情况的最大;环向与轴向DSCF最大可分别达到32.31与16.12;(2)入射频率和入射角度对DSCF也有很大影响。The series solution of an underground cylindrical lined cavern subject to incident plane SV waves and Rayleigh waves[5] can be used to quantitatively analyze the effect of liner stiffness,incident wavelength and incident angle on dynamic stress concentration.The numerical results show that：（1） the rigidity of line has significant effect on dynamic stress concentration factor（DSCF）.DSCF is lowest for a cavern with flexible lining,and is highest for a cavern with rigid lining.The dynamic circumferential and axial stress concentration factor can be 32.31 and 16.12 respectively;（2） the frequency and the angles of the incident waves also play an important role in the dynamic stress concentration factor.

关 键 词：衬砌洞室 SV波 RAYLEIGH波 动应力集中 数值结果 

分 类 号：O347.4[理学—固体力学] P315.3[理学—力学]