利用ANSYS瞬态分析直接进行结构静动力分析的一种方法

摘要

For the problem of static-dynamic analysis of large structure considering both static and dynamic effect, using the traditional method of case combinations in ANSYS have the limitations: the method is complex and difficult to directly get element stress under a certain time. Through analysis on the static and transient principles, it is indicated that by setting the integral time step and other parameters in transient analysis, static problems are solved in the transient analysis. When applying it to the static-dynamic analysis, structural response with static load and dynamic load can be directly solved in the transient analysis. Finally, numerical example proves good accuracy and stability of the method presented in this paper, which can be easily used in the study of static-dynamic analysis.%有限元软件ANSYS中，对同时考虑静力效应和动力效应的大型结构静-动力分析问题，传统的工况组合方法比较复杂，且难以直接获取某一时刻下有限元模型的单元应力。通过对ANSYS静态分析和瞬态分析原理的研究，表明瞬态分析时设置积分时间步长及相关参数后，可在瞬态分析中完成静力问题的求解。将该结论应用于结构静-动力分析中，实现了单独在瞬态分析中直接求解结构在静力荷载与动力荷载同时作用下的响应。数值算例验证了该方法的精度及稳定性。结果表明该方法可以方便地应用于结构静-动力分析中。