轨道交通槽形梁局部振动及参数敏感性分析

发布时间：2018-03-25 05:16

本文选题：槽形梁　切入点：有限元　出处：《铁道科学与工程学报》2017年11期

【摘要】：针对轨道交通槽形梁局部振动的问题,基于有限元理论,建立轨道交通槽形梁有限元模型。对其进行模态分析,再基于车辆-轨道耦合动力学理论,计算槽形梁在列车荷载作用下的局部振动响应,通过对选取的5个输出点的加速度频谱曲线进行分析。研究结果表明:槽形梁翼缘板的横向振动响应最大,最大的加速度振级为107.2 d B。槽形梁底板的垂向振动加速度在50 Hz处有峰值,左右两边的翼缘板和腹板的横向振动响应频谱曲线相类似,都在12.5 Hz和40 Hz处有峰值。通过槽形梁结构参数对槽形梁局部振动响应的敏感性分析,表明加厚底板厚度能够很好地降低槽形梁的振动响应。但并非越厚越好,其最佳值还有待进一步分析。
[Abstract]:For rail transport channel beam local vibration problem based on finite element theory, the establishment of rail transport channel beam finite element model. The modal analysis is carried out, and the theory of vehicle track coupling dynamics based on the calculation of local vibration trough girder under train load response, by analyzing the acceleration spectrum curve of 5 the output point is selected. The results show that the maximum transverse vibration response of channel beam flange, maximum acceleration vibration level is 107.2 D B. trough beam floor vertical vibration acceleration at 50 Hz peak, the lateral vibration on both sides of the flange plate and the web of the response spectrum curve is similar to that of a the peak at 12.5 Hz and 40 Hz. Through the sensitivity analysis of channel beam structure parameters of beam vibration response of tank, showed thickened plate thickness can effectively reduce the vibration response of channel beam but not the thicker the. Well, the best value remains to be further analyzed.

【作者单位】：华东交通大学铁路环境振动与噪声教育部工程研究中心;
【基金】：国家自然科学基金资助项目(51268014,51578238) 江西省“赣鄱英才555工程”领军人才培养计划资助项目江西省研究生创新专项资金资助项目(YC2016-S248)
【分类号】：U211.3;U441.3

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