A direct integration method based on gurtin variational principle

摘要

Based on Gurtin variational principle of displacment model, a kind of non-time-step parameter direct integration method for dynamic analysis is presented by assuming a non-time-step parameter interpolation function in time domain. The algorithm is a kind of new recursive calculation integration method. It is an unconditionally stable integration algorithm. The examples show that it is a simple, effective and satisfying accurate method.