| 考虑摩擦与刹车制动力作用时的车桥耦合振动数值分析 |
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| 引用本文： | 蒲军平,池延东.考虑摩擦与刹车制动力作用时的车桥耦合振动数值分析[J].科技通报,2012(1):167-172. |
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| 作者姓名： | 蒲军平 池延东 |
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| 作者单位： | 浙江工业大学建筑工程学院 |
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| 摘 要： | 为了研究车辆在桥面上行驰过程中突然刹车对桥梁产生的冲击振动的影响,考虑了车轮处的摩擦力与刹车制动力共同作用时移动质量模型对车桥的耦合振动现象进行数值模拟。对于工程中常用的变截面箱梁,推导了平面内呈线性和抛物线形变化时的质量阵,采用Romberg数值积分方法得到刚度矩阵中的系数项。对于变速行驰在桥面上的车辆出现紧急刹车的现象,考虑了车轮与桥面间的摩擦并引入冲击系数模拟刹车力对桥面的作用,探讨了摩擦系数与冲击系数对车桥耦合振动的影响。
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| 关 键 词： | 动力响应 多跨连续桥 移动车辆 刹车力 摩擦力 |
Numerical Analysis for Coupling Vibration of Bridge and Vehicle with Braking Force and Friction |
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| PU Junping,CHI Yandong.Numerical Analysis for Coupling Vibration of Bridge and Vehicle with Braking Force and Friction[J].Bulletin of Science and Technology,2012(1):167-172. |
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| Authors: | PU Junping CHI Yandong |
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| Institution: | (College of Civil Engineering & Architecture,Zhejiang University of Technology,Hangzhou,310032,China) |
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| Abstract: | In order to research an impact effect of a vehicle braking suddenly on the bridge,a moving mass model is used and the friction together with the braking force are considered.For a non-uniform box-section beam,which can be widely used in engineering structures,with both linear and parabolic variable heights in a plane,the mass matrices are deduced.Each coefficient in stiffness matrix can be obtained by means of Romberg numerical integral scheme.For the case that a vehicle brakes suddenly on the bridge at a variable velocity,the frictions between wheels and bridge deck were considered,and the action of braking forces to the bridge deck were simulated by inducing an impact coefficient.A combination effect of friction and impact coefficients for a coupling vibration of bridge and vehicles is discussed. |
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| Keywords: | dynamic response multi-span continuous bridge moving vehicle braking force friction |
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