复合材料衬垫汽车车轮表面缺陷原因的识别

A. Lovska, V. Ravlyuk
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引用次数: 0

摘要

本文介绍了货车车轮与复合制动片摩擦作用引起的表面缺陷和故障的分析结果。研究表明,影响货车车轮热机械性能的主要因素是制动过程中产生的热载荷。在主要由长时间制动引起的热过载情况下,会产生应力和变形,其后果是货车车轮滚动表面出现高温局部缺陷。这些缺陷对列车的安全产生了负面影响,并显著增加了铁路运输的运营成本。为了确定货车车轮在制动过程中的热应力状态,对其进行了计算。作为一种计算方法,采用了有限元法,并在SolidWorks仿真软件包中实现。从确保车轮强度的角度来看,制动过程中对车轮的温度影响是允许的。所进行的研究将有助于制定管理车轮温度影响的建议,以及提高列车安全性和大幅降低铁路运输运营成本。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
IDENTIFICATION OF THE CAUSES OF SURFACE DEFECTS OF WHEELS OF CARS EQUIPPED WITH COMPOSITE PADS
The paper presents the results of the analysis of surface defects and faults of freight car wheels caused by frictional interaction with composite brake pads. It is established that the main influence on the thermomechanical behavior of freight car wheels is caused by thermal loads that occur during braking. In cases of thermal overloads, which arise mainly as a result of prolonged braking, the generation of stresses and deformations occurs, the consequences of which are the appearance of high-temperature local defects on the rolling surface of freight car wheels. These defects negatively affect the safety of trains and significantly increase the operating costs of railway transport. To determine the thermal stress state of the freight car wheel during braking, its calculation was carried out. As a calculation method, the finite element method was used, which is implemented in the SolidWorks Simulation software package. The temperature effect on the wheel during braking is determined to be permissible from the point of view of ensuring the strength of the wheel. The conducted research will contribute to the creation of recommendations for managing the temperature effect on the wheel, as well as improving the safety of trains and significantly reducing operating costs in railway transport.
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