Evaluating the Nonlinear Dynamic Stiffness of Rail Pad using Finite Element Method

Q4 Engineering

Journal of Mechanical Engineering Pub Date : 2023-09-15 DOI:10.24191/jmeche.v20i3.23905

Abdul Malek Abdul Wahab

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引用次数: 0

Abstract

Unwanted vibration and noise from railroads have a significant negative impact on the environment, causing damage to roads, buildings, and other structures. To mitigate this condition, rail pads have been installed as dampers to lessen the impact of vibration and shock on the railway track. The rail pad is made of a polymeric substance having nonlinear properties. This research examined the dynamic stiffness of rail pads made of thermoplastic elastomers (TPEs). ANSYS software was used to estimate the impact of temperature, toe load, and frequency under dynamic loading. The three-dimensional (3D) finite element model (FE) was created based on hyperelastic theory. The dynamic stiffness of the interlayer decreases with increasing temperature. For the effect of peak load and frequency, both parameters were directly proportional to dynamic stiffness. An increase in either parameter results in a stiffening of the interlayer. Frequency has the least effect on the dynamic stiffness of the track bed compared to temperature and peak load, with the average percentage difference between high and low being 28.31%, 55.57%, and 21.9%, respectively.

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用有限元法评估轨道垫块的非线性动刚度

来自铁路的不必要的振动和噪音对环境有重大的负面影响，造成道路，建筑物和其他结构的破坏。为了缓解这种情况，已经安装了轨道垫作为阻尼器，以减轻振动和冲击对铁路轨道的影响。所述导轨垫由具有非线性特性的聚合物质制成。本文研究了热塑性弹性体(TPEs)钢轨垫的动态刚度。利用ANSYS软件估计了温度、趾部载荷和频率在动载荷作用下的影响。基于超弹性理论建立了三维有限元模型。中间层的动刚度随温度的升高而降低。对于峰值载荷和频率的影响，这两个参数与动刚度成正比。任何一个参数的增加都会导致夹层的加强。与温度和峰值载荷相比，频率对轨道床动刚度的影响最小，高、低的平均百分比差值分别为28.31%、55.57%和21.9%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Mechanical Engineering Engineering-Mechanical Engineering

CiteScore

1.00

自引率

0.00%

发文量

审稿时长

16 weeks

期刊介绍： Journal of Mechanical Engineering (formerly known as Journal of Faculty of Mechanical Engineering) or JMechE, is an international journal which provides a forum for researchers and academicians worldwide to publish the research findings and the educational methods they are engaged in. This Journal acts as a link for the mechanical engineering community for rapid dissemination of their academic pursuits. The journal is published twice a year, in June and December, which discusses the progress of Mechanical Engineering advancement.