地下溶洞不同枯盈状态下的地震响应差异模拟研究  

Seismic Response Modeling of Karst Caves in Different Water Content

作　　者：原健龙 范欣然[1] 付小波[1] 韩超[1] 余嘉顺[1] 

机构地区：[1]成都理工大学地球物理学院,四川成都610059

出　　处：《测绘与空间地理信息》2015年第11期30-33,共4页Geomatics & Spatial Information Technology

基　　金：四川省科技厅科技支撑项目(2013SZ0173);国家级大学生创新创业训练计划(14Z003-38)资助

摘　　要：针对地下溶洞不同枯盈状态下的地震波响应差异问题,选择三种枯盈状态下的溶洞模型进行了一项数值模拟实验。先从弹性波方程理论出发,利用有限差分离散近似,再运用CUDA编程平台进行GPU并行计算,模拟了三种枯盈状态下的溶洞地震波响应。模拟结果表明,P-P波的能量随着溶洞含水量增多而减少,而溶洞尖灭点的绕射现象随着溶洞含水量增多而变得更加明显。A numerical experiment using seismic wave equation forward modeling was carried out to analyze the difference of seismic response of three karst caves in different water content.A finite difference scheme was used to solve the elastic wave equation for the wave propagation in the model in which a karst cave was embedded.GPU parallel computing was performed in a CUDA platform for the forward modeling of the wave fields.The experiment shows that,the higher water saturation content is in the karst cave,the weaker energy of P-P waves is reflected from the cave,and more significant diffraction waves of the cave pinch out point can be observed.

关 键 词：溶洞 地震响应 正演模拟 有限差分 并行计算 

分 类 号：P315.728[天文地球—地震学]