基于弹性半空间体模式的路面结构有限元-无限元混合模型分析  

Finite/infinite element analysis of the static and dynamic properties of elastic half-space body

作　　者：刘俊卿[1] 孙莹[1] 孔旭光[1] 

机构地区：[1]西安建筑科技大学理学院,陕西西安710055

出　　处：《西安建筑科技大学学报（自然科学版）》2007年第3期369-373,共5页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

基　　金：陕西省自然科学基金资助项目(2006D21);陕西省教育厅资助项目(05JK237)

摘　　要：采用空间有限元-无限元耦合法对弹性地基的静、动力特性进行了分析,数值模拟了弹性半空间体受任意移动荷载作用下的动力响应问题.有限元区利用三维8节点模型,无限元区采取三维8结点单向空间无限元模型和7结点五面体双向无限元模型,根据达朗贝尔原理,建立体系的运动方程,利用Wilson-θ法经MATLAB编程计算出不同瞬时、移动动荷载作用在不同位置时弹性体上各点的动力响应值.通过数值计算验证了的动力响应问题是有效的.得出一些有意义的结论.In this paper, space finite-infinite element coupling method is used to analyse the static and dynamic properties of elastic foundation. The dynamic effects of the elastic half-space body under arbitrary travelling loads is deduced. The finite area is supposed as 8-node and 3-D simple direction finite element model, the infinite area is supposed as 8-node and 3-D simple direction infinite element and 7-node two directions infinite element model. According to principle of d＇Alembert, the system＇s motion equation is set up,and by Wilson-θ method, MATLAB is used to compute the dynamic effects of different positions of different time under travelling loads. Dynamic effects are tested to be affected by numerical calculation and some meaningful conclusions are concluded.

关 键 词：弹性地基 有限元 无限元 动力响应 移动荷载 

分 类 号：TU311[建筑科学—结构工程]