论文部分内容阅读
采用大型有限元分析软件ANSYS建立了润扬悬索桥的三维有限元模型并对其进行了自振特性分析,同时计算了各种工况下大桥的应力及位移响应.基于灵敏度的物理意义以及罚函数的思想,提出了一种结构有限元模型修正的新方法.该方法仍以自振特性为目标函数,以结构设计参数为待修正参数,但设计参数的上下限根据测试所得静力响应值和理论值的对比以及工程经验来确定,因此静力响应可用于验证修正后的有限元模型.采用结构健康监测系统数据及提出的方法对大桥有限元模型进行了修正与验证,得到了能够较好地反映大桥整体动静力性能的有限元基准模型,为润扬悬索桥的健康监测和损伤预警提供了研究基础.
The finite element analysis software ANSYS was used to establish the three-dimensional finite element model of Runyang Suspension Bridge and to analyze its natural vibration characteristics, and to calculate the stress and displacement response of the bridge under various operating conditions. Based on the physical meaning of sensitivity and penalty function , This paper proposes a new method of structural finite element model modification.The method still takes the natural vibration characteristics as the objective function and the structural design parameters as the parameters to be corrected, but the upper and lower limits of the design parameters are determined according to the static response value and The theoretical value of the comparison and engineering experience to determine, so the static response can be used to verify the modified finite element model.Using the data of structural health monitoring system and the proposed method of bridge finite element model was revised and verified, got better The finite element model, which reflects the overall static and dynamic performance of the bridge, provides the foundation for health monitoring and damage warning of Runyang Suspension Bridge.