【摘要】 近年在国内很流行的大型通用程序ANSYS不但具有强大的前后处理功能、丰富的单元类型和材料库,而且该软件中有一个LS-DYNA模块采用了粘性边界(viscous boundary)来模拟无限域的影响,从而可以方便地、较准确地进行地基动力作用分析。国外利用ANSYS/LS-DYNA进行地基动力作用分析非常普遍,而国内还未见到将ANSYS/LS-DYNA用于地震工程。本文将介绍如何利用ANSYS/LS-DYNA进行地基动力作用分析,同时,由于软件中用于模拟无限域的粘性边界精度较低,本文提出采用精度较高的粘-弹性边界替换粘性边界,从而改善了计算结果。更多还原

【Abstract】 ANSYS, a popular large-scale finite element analysis software, not only has the powerful functions of preprocess and post process, abundant element types and material libraries, but also has a module of LS-DYNA, in which viscous boundary is adopted to simulate the effects of infinite field. As a result, it can solve the problems of foundation dynamic analysis more effectively and conveniently. LS-DYNA program has been widely used abroad to analyze foundation dynamic, while it has seldom been used in China, especially in the field of earthquake engineering. In this paper, the usage of LS-DYNA to analyze foundation dynamic will be introduced first. Furthermore, because the precision of viscous boundary is not high enough, viscous-spring boundary is introduced to substitute for viscous boundary. As demonstrated by numerical calculation results, this approach can improve the calculating precision obviously.更多还原