论文部分内容阅读
本文将地震过程看作是一个包含断裂带和围岩的力学系统在外界扰动下的一种失稳现象,用变形体力学方法给出了断层带介质软化的本构方程和地震非稳定模型的一般的数学表述.借助于均匀场的非稳定模型,本文讨论了弹性回跳概念,导出了地震效率公式和论证了能量形式失稳准则的普遍性,并指出了在刚性试验机上研究声发射现象的重要意义.本文还介绍了用于研究非均匀场的地震非稳定性的有限单元法的通用程序以及唐山地震的算例.
In this paper, the seismic process is regarded as a kind of instability of a mechanical system containing fault zone and surrounding rock under the disturbance of the outside world. The constitutive equation of softening of media in fault zone and the unsteady model of earthquake are given by means of deformation body mechanics In this paper, we discuss the concept of elastic bounce, derive the seismic efficiency formula and demonstrate the universality of the energy form instability criterion, and point out that the phenomenon of acoustic emission in a rigid testing machine This paper also introduces the general procedure of finite element method for studying the seismic instability of non-uniform fields and an example of Tangshan earthquake.