摘要
对计算悬索桥特性的3种方法首先做以比较,在此基础上根据一座自锚式悬索桥———吉林松花江大桥的结构特点,在通用有限元分析软件ANSYS中建立了大桥的三维有限元动力计算模型:采用脊梁模式简化桥面系结构;对桥梁其他部位的模拟进行分析;计入了几何刚度。通过静力计算获得了调整悬索桥索力的方法和标准,而后对大桥的动力特性进行了计算分析,获得了大桥的自振频率和振型,最后按照4种不同工况做动力特性的对比计算和分析,总结了影响悬索桥动力特性的几种因素。
Three methods for calculating dynamic performance of bridges are compared.Based on a Suspension BridgeSonghuajiang Bridge in Jilin Province,the threedimension FE singlebeam model is built,the FEA program ANSYS is used to calculate the dynamic performance of the bridge,and many functions of ANSYS such as coupling,cable element etc.effectively simulate the stuctural details of the bridge,including bearings,rigid areas,cables(tension only)etc.Not only the natural frequency and modes are acquired,but also the contrast results are gained in four different conditions used in the bridge.So practical proposal is suggested about using ANSYS to analyze suspension bridge dynamic performance,and the method adjusting cable force of suspension bridges is acquired.
出处
《公路交通科技》
CAS
CSCD
北大核心
2004年第7期66-69,共4页
Journal of Highway and Transportation Research and Development
关键词
ANSYS
动力特性
振型
悬索桥
自振频率
ANSYS
Dynamic performance
Mode
Natural frequency
Suspension bridge
