各向异性介质接触界面波的理论与实验研究

Interface waves play an important role in seismology. The present project studies the properties of contacting interface waves in anisotropic media, including: 1) The reflection and refraction of quasi body waves at the contacting interface between two anisotropic solids are investigated by using Fourier analysis. Local separation and slip of the interface are considered. The high harmonic generations are discussed. The results are qualitatively accordant with experiments'. 2) The concept of the "surface impedance tensor" in Stroh formulism, which is used widely in bilateral interface wave theory, is applied to investigate the wave propagation along a unilateral contacting interface by combining the Fourier analysis and singular integral equation technique. The frictional contacting interface with separation and the frictional contacting interface with slip are considered. 3) The dynamic instability of interface slip waves is studied by extending "surface impedance tensor" to the case of complex wave speeds. The results of this project are valuable to the development of the theory on seismic waves.

以不可逆热力学为基础，研究静动态统一本构关系的一般理论，给出判别不可逆过程是否与时间相关的热力学条件，给出既适用于静态又适用于动态的内变量演化方程。结合三轴静载实验和单轴动载实验建立岩石的静动态统一本构模型，模型将适用于静态加载、地震动载和爆破动载。研究模型参数的确定方法。把模型编制成可用于有限元计算的程序。