移动载荷作用下非线性连接浮桥的动力响应  

Analysis of the Moving-Load-Induced Vibrations of a Nonlinearly Connected Floating Bridge

作　　者：付世晓[1] 崔维成[1] 陈徐均[2] 林铸明 

机构地区：[1]上海交通大学船舶海洋与建筑工程学院,上海200030 [2]解放军理工大学工程兵工程学院,南京210007 [3]总装工程兵科研一所,无锡214035

出　　处：《上海交通大学学报》2006年第6期1004-1009,共6页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金资助项目(50309018)

摘　　要：以非线性有限元方法为基础,考虑桥节间非线性连接的影响,建立了浮桥三维动力响应分析控制方程,并采用超单元方法对系统的运动方程进行缩减;然后用Newmark直接积分和New-ton-Raphson迭代方法求解系统的非线性运动方程,研究了移动载荷作用下非线性连接浮桥的三维非线性动力响应特性.研究表明,桥节之间连接的非线性特性和间隙的大小对于浮桥的动力响应影响很大,必须加以考虑.Based on 3D nonlinear finite element method, the motion equations for a nonlinearly connected floating bridge considering the nonlinear properties of connectors were proposed. The super-element method was used to reduce the calculation scale, and the direct integration and Newton-Raphson iteration method were applied to solve the reduced equations. The dynamic displacement and connection forces characteristics of a floating bridge with nonlinear connecters subjected to moving loads were investigated. It was found that the nonlinear properties and initial gap of the connectors are important for the dynamic response of a nonlinearly connected floating bridge.

关 键 词：浮桥 移动载荷 动力响应 间隙 非线性 

分 类 号：U661.43[交通运输工程—船舶及航道工程]