Equivalent analysis of orthogonal viscoelastic jointed rock via an adaptive algorithm in time domain

This paper presents a recursive equivalent constitutive model that is nested in an FE (finite element) based recursive adaptive process to estimate equivalent behaviors of orthogonal viscoelastic jointed rock. An adaptive algorithm in the time domain and a simple equivalence assumption are combined to convert an inhomogeneous time dependent problem into a series of recursive homogeneous time independent problems, which can be solved either by finite element method (FEM) or other well developed numerical schemes. Ten equivalent analysis based numerical solutions are compared with the FE-based heterogeneous solutions via ANSYS. In the viewpoint of balance between computing accuracy and cost, the results achieved by the proposed approach are fairly good.