大型正交异性结构动力学分析的空间-时域多尺度方法及应用  

Space-time domain multiscale simulation method for dynamic analysis of large-scale orthotropic structure and its applications

作　　者：张伟伟[1] 金先龙[1] 翁依柳[1] 王建炜[1] 杨颜志[1] 

机构地区：[1]上海交通大学机械系统与振动国家重点实验室机械与动力工程学院,上海200240

出　　处：《计算力学学报》2015年第6期722-732,共11页Chinese Journal of Computational Mechanics

基　　金：国家自然科学基金(11272214;51475287);国家863重大项目课题(2012AA01A307)资助项目

摘　　要：为了更加精确、快速地求解大型正交异性结构整体及局部动力响应,提出了基于有限元模态分析和参数优化的等效及多尺度建模方法,在等效建模时可以充分考虑结构细节对整体动力学属性的影响,在时域内采用基于显式中心差分子循环算法求解系统方程,可以减小局部精细建模带来的求解时间惩罚。通过大型盾构隧道地震响应以及船-桥碰撞过程仿真计算验证了方法的有效性和实用性,仿真得到的响应规律可为相关结构设计提供参考。In order to solve the overall and local dynamic responses of large-scale orthotropic structure more accurately and efficiently,a combined equivalent ＆ multi-scale simulation method based on the finite element modal analysis and parameter optimization is proposed, by which the equivalent model can fully consider the details＇ influences on the dynamic property of the overall structure. The system equation can be solved by the subcycling approach based on the explicit central difference algorithm,reducing the solution time penalty brought by the local fine modeling. The effectiveness and practicality of the method were verified by the simulations of large scale shield tunnel seismic response and shiwbridge collision process. The responses get from the simulation can be used for the improvement of the relevant strue-tural designs.

关 键 词：正交异性结构 动力学分析 等效建模 空间-时域 多尺度模拟 

分 类 号：O342[理学—固体力学] O242.2[理学—力学]