移动荷载作用下轨道基础刚度突变对轨道振动的影响被引量：12

Effects of abrupt changes in track foundation stiffness on track vibration under moving loads

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摘要通过建立移动荷载作用下具有基础弹性刚度突变连续梁的振动微分方程,得到了梁的变形解析表达式。利用该解析解和叠加原理,以车辆通过铁路轨道为例,研究了轨道基础弹性突变对轨道振动的影响,分析了单轮对和一台TGV高速动车通过五种轨道刚度比时的轨道动力响应。计算表明,基础弹性突变对梁的振动有较大影响,其影响随着移动荷载速度的增加而增加。 Analytical deformation formula of the continuous beam under moving loads has been derived by establishing the vibration differential equation of the continuous beam with foundation elasticity stiffness abrupt change. Taking the railway track as an example, the effect of the abrupt change of the track foundation elasticity stiffness on track vibration is investigated and the dynamic responses of the track under a single wheel set and a TGV high speed locomotive when passing through the track with five stiffness ratios are analyzed by means of this formula and the superposition principle. The computations show that the foundation elasticity stiffness abrupt change has greater influences on beam vibration. This influences increase with increase of the velocity of the moving loads.

作者雷晓燕

机构地区华东交通大学土建学院

出处《振动工程学报》 EI CSCD 北大核心 2006年第2期195-199,共5页 Journal of Vibration Engineering

基金国家自然科学基金(50568002) 江西省自然科学基金(0450012) 江西省主要学科学术和技术带头人培养计划基金资助(020001)

关键词轨道振动连续基础梁基础刚度突变轨道基础刚度 track vibration continuous foundation beam elasticity stiffness abrupt change track foundation stiffness

分类号 U213.2 [交通运输工程—道路与铁道工程]

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