【摘要】 根据Biot波动理论并结合复变函数和多级坐标的方法,对半无限饱和土中地震波对地下多孔洞的动力响应问题进行了研究。给出了P波对2个圆形孔洞的动应力集中系数的数值结果,讨论了动应力集中系数在随孔间距、入射角以及无量纲波数的变化时在孔洞周边分布情况。研究结果表明:地下孔洞之间的间距对孔洞之间的相互作用影响明显,当孔洞之间间距达到6倍孔半径时动应力集中系数峰值明显减小且在周边分布偏移量减弱;随着入射角度的增加,孔洞周边应力集中系数呈现出先增大后减小的趋势,分布也发生一定角度的偏转;在低频入射波作用时,孔洞应力峰值相互影响较大,在高频波入射时,孔洞之间相互作用减弱。更多还原

【Abstract】 According to the Biot’s wave theory and the complex function combined with multi-coordinate method,the seismic wave dynamic response of underground holes in half saturated space is studied.Given P waves on two circular holes of the dynamic stress concentration factor of the numerical results,the distribution situations of the dynamic stress concentration factors are discussed with the variation of the hole spacing,incidence angle and dimensionless wave number.The results show that,the effect of the underground hole spacing on the interaction effects of the holes is obvious.When the hole spacing reaches up to 6 times the radius of the hole,the peak value of the dynamic stress concentration factor decreases obviously,and the peripheral distribution of offset is weakened.With the increase of the incident angle,the hole peripheral stress concentration coefficient shows the trend of first increasing then decreasing,and distribution also occurs at certain angle deflection.In low frequency waves,the hole stress peak value will influence mutually more,while in the high frequency input,the interaction between holes will reduce.更多还原