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.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
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)
关键词
浮桥
移动载荷
动力响应
间隙
非线性
floating bridge
moving loads
dynamic responses
gap
nonlinear
