基于动力有限元的路基动力响应数值模拟分析

The Numerical Simulation Analysis of Subgrade Dynamic Response Based on dynamics Finite Element Method

为了研究路基动力响应特性,本文基于动力有限元原理,采用考虑Rayleigh阻尼的空间三维非均质线弹性体系作为结构模型,通过Newmark法求解在FWD脉冲荷载作用下结构的动力响应,并用Fortran90语言编制了相应的正演计算程序,并与实测数据及大型有限元程序计算结果进行了对比与分析,结果表明:该程序计算结果与实际结果吻合较好,与ANSYS计算结果相近,具有较好的计算精度.

In order to study the dynamic response of subgrade,the spatial three-dimensional non-homogeneous linear elastic system is used as a structural model firstly.Then the model based on the basic principles of finite element and considering Rayleigh damping is used to calculate the dynamic response of structures by the Newmark method under the FWD pulse load.The method is programmed with the Fortran90 language and the forward calculation procedure has also been verified to be correct.The result shown： the caluated result in this paper is close to actual result and finite element results.