橡胶浮置板式轨道结构竖向振动分析模型

邹锦华; 姜海波; 夏晓舟

doi:10.19818/j.cnki.1671-1637.2009.04.007

橡胶浮置板式轨道结构竖向振动分析模型

doi: 10.19818/j.cnki.1671-1637.2009.04.007

广东工业大学土木与交通工程学院, 广东广州 510006

基金项目:

国家自然科学基金项目 50378040

广东省科技计划项目 2003C103008

详细信息

作者简介:
邹锦华(1975-), 男, 江西瑞金人, 广东工业大学讲师, 工学博士, 从事新型桥梁结构研究

中图分类号: U213.212
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出版历程
- 收稿日期: 2009-02-27
- 刊出日期: 2009-08-25

Analysis model of vertical vibration for rubber floating slab track

School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, Guangdong, China

More Information

Author Bio:
ZOU Jin-hua(1975-), male, lecturer, PhD, +86-20-39322528, zoujinhua@gdut.edu.cn

Article Text (Baidu Translation)

摘要

摘要: 应用轨道段组合单元, 建立了能反映橡胶浮置板式轨道结构竖向振动特性的动力分析模型。在模型中, 钢轨模拟为连续弹性支承的Euler梁; 浮置板视为弹性薄板, 用有限元法中的纵横向有限条带单元进行离散; 钢轨扣件及橡胶支座模拟为线性弹簧和阻尼。基于弹性系统动力学总势能不变值原理和形成系统矩阵的“对号入座”法则, 建立了地铁列车-橡胶浮置板式轨道竖向振动方程, 并对车辆和轨道结构的动力特性进行了数值分析。计算结果表明: 地铁列车通过广州地铁二号线橡胶浮置板式轨道时, 轮重减载率最大值为0.597, 车体竖向振动加速度最大值为0.846 m.s^-2, 浮置板式轨道系统的隔振效率为20%~27%, 因此, 车辆-轨道结构竖向振动分析模型能够准确描述地铁车辆和橡胶浮置板式轨道结构间的动力特性。
- 橡胶浮置板式轨道 /
- 竖向振动 /
- 纵横向有限条带单元 /
- 轨道段组合单元 /
- 振动分析模型
Abstract: According to the structural vertical vibration characteristics of rubber floating slab track, a composite element dynamic analysis model of track section was established.In the model, Euler beam element with continuous elastic supports was used to simulate steel rail.Floating slab track was taken as elastic thin plate and was discreted by longitudinal and lateral directional finite strip elements.Linear spring and damp were regarded as fastener and rubber support.Based on the principle of total potential energy with stationary value in elastic system dynamics and the "set-in-right-position" rule for formulating system matrices, the total potential energy of vertical vibration of train and track was obtained and the matrix equation of vertical vibration was established to analyze the vibration properties.Analysis result indicates that the maximum reduction rate of wheel load is 0.597, the maximum vibration acceleration of car body is 0.846 m·s^-2 and the vibration isolation efficiency of the track system is between 20% and 27%.Obviously, the vertical model accurately describes the dynamic response properties of vehicle and track.
- rubber floating slab track /
- vertical vibration /
- longitudinal and lateral directional finite strip elements /
- segment element of track section /
- vibration analysis model

HTML全文

图 1 轨道结构

Figure 1. Track structure

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图 2 竖向振动分析模型

Figure 2. Vertical vibration analysis model

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图 3 有限条带位移模式

Figure 3. Displacement models of finite strip

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图 4 轨道结构尺寸

Figure 4. Sizes of track structure

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表 1 轨道动力学性能指标

Table 1. Dynamics performance indices of track

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表 2 车辆动力学性能

Table 2. Dynamics performances of vehicles

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