摘要
从BISQ模型弹性波的本构方程和运动方程出发,推导出了基于BISQ模型的各向同性孔隙介质弹性波三维高阶交错网格有限差分算法,进行了数值模拟,在低频下能看到明显的快纵波、快横波和微弱慢纵波,在高频情况下可以看到明显的快纵波、快横波、慢纵波和慢横波。在三维情况下对比了xoz、xoy、yoz平面内的波场切片,并对平行xoz平面,不同y值处的波场切片进行了对比,结果证明三维数值模拟可以从不同角度更好地反映波场的传播特性。
From the constitutive equations and kinematic equations based on BISQ model, the authors get the staggered-grid high-order FD scheme on propagation of elastic wave in three-dimensional isot：ropic media, and carry through the numerical simulation. The result of 3D numerical simulation shows there existing fast P wave, fast S wave, slow P wave, slow S wave in high frequency, and fast P wave, fast S wave, faint slow P wave in low frequency. Compared the wave field snap in different pane, the result indicates that 3D numerial simulation can show the characteristic of wave propagation in a different way.
出处
《世界地质》
CAS
CSCD
2007年第4期501-508,共8页
World Geology
基金
国家"863"计划资助项目(2005AA615040)
国家海洋局青年基金资助项目(2007311)
关键词
孔隙介质
交错网格
高阶有限差分
数值模拟
porous medium
staggered grid method
high-order finite difference
numerical simulation
