管道模型瞬态动力分析间隙刚度取值研究

Gap Stiffness Value Research in Transient Dynamic Analysis for Piping Model

建立与模型结构的非线性边界条件(间隙)相符合的数学模型,应用试验中测量得到的冲击台面上管道模型支承处的加速度时程作为输入载荷,采用ANSYS大型通用有限元程序,进行一系列的几何非线性瞬态动力时程分析,计算管道模型在冲击载荷作用下的非线性动力响应,将计算结果与试验的测量值进行比较。通过对各种计算方案的几何非线性冲击动力瞬态时程计算分析结果与试验的测量值之间的分析比较,探索支承间隙的合理模拟方法。

Set up a geometry nonlinear finite element model consistent with experiment model to calculate shock response of piping under transient load with nonlinear transient dynamic time history method and made comparison between corresponding experiment data and numeric results. By way of this comparison, the exploration study has been done for how to simulate the gap of support and how to confirm the gap stiffness.