| 变截面桥梁在变速移动荷载作用下的动力响应 |
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| 引用本文： | 汪小超,蒲军平.变截面桥梁在变速移动荷载作用下的动力响应[J].科技通报,2009,25(2). |
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| 作者姓名： | 汪小超 蒲军平 |
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| 作者单位： | 1. 浙江工业大学,浙西分校,浙江,衢州324000
2. 浙江工业大学,浙西分校,浙江,衢州324000;浙江工业大学,建筑工程学院,杭州,310032 |
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| 摘 要： | 为了模拟车辆/列车通过多跨变截面桥梁时的耦合动力响应,采用有限元法将移动车辆作为移动质量处理,使用Euler-Bernoulli变截面梁单元模拟桥梁结构,讨论了移动质量在梁桥模型上作匀变速运动下的有限元离散模式.在假定变截面模式的基础上,推导了梁高呈线性变化及抛物线性变化的矩形截面梁单元刚度矩阵和质量矩阵,并对多个变速移动荷载作用下的梁桥结构动力响应进行了数值模拟.运用该方法可以使变截面梁的分析简化,计算结果可作为工程设计和科学研究时的参考.
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| 关 键 词： | 动力响应 移动质量 变截面梁 变速 |
Dynamic Responses Analysis for Non-uniform Beams Subjected to Moving Load with Non-uniform Velocity |
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| WA NG Xiaochao,PU Junping.Dynamic Responses Analysis for Non-uniform Beams Subjected to Moving Load with Non-uniform Velocity[J].Bulletin of Science and Technology,2009,25(2). |
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| Authors: | WA NG Xiaochao PU Junping |
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| Institution: | 1.West Branch of Zhejiang University of Technology;Quzhou;324000;China;2.College of Civil Engineering and Architecture;Zhejiang University of Technology;Zhejiang Hangzhou 310032;China |
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| Abstract: | In order to simulate the coupling dynamical response of a vehicle or train passed a multi-span supported bridge with non-uniform cross sections,a moving mass model had been utilized according to the Finite Element Method,using Euler-Bernoulli beam elements with variable cross-sectional properties,the finite element discretization form had been discussed for the moving mass on the bridge with a non-uniform velocity.Basing on presuming mode of a non-uniform rectangular section beams with both linear and parab... |
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| Keywords: | dynamic response moving mass non-uniform beam non-uniform velocity |
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