往复荷载作用下的改进动接触力方法

MODIFIED DYNAMIC CONTACT FORCE METHOD UNDER RECIPROCATING LOAD

该文基于与中心差分显式时间积分法相结合的动接触力方法,引入主、从节点的相对速度作为判断接触状态转变的标准,提出了一种能够适用于求解往复荷载作用的改进动接触力方法。改进方法能够准确地模拟分离、静接触、滑动接触以及反向滑动四种不同接触状态间的转变,为地震等往复荷载作用下结构动力分析提供了有力工具。数值算例验证了该文方法的正确性。

This paper presents a modified reciprocating contact force method for solving earthquake engineering problems. The proposed method employs the criteria of the relative velocity between master and slave nodes, together with a central difference time-integration scheme. This method is a powerful tool to conduct a structural dynamic analysis with the possible transitions of four contact statuses, i.e., separation, stick contact, sliding contact and reverse sliding contact. Numerical examples illustrate the efficiency of the proposed method.