钢轨波纹和齿轮时变啮合刚度激励下的机车非线性动力响应

IF 1.3 4区 工程技术 Q3 TRANSPORTATION SCIENCE & TECHNOLOGY
Zaigang Chen, Jie Zhang, Kaiyun Wang, Peng-fei Liu
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引用次数: 0

摘要

铁路波纹通常是在现代铁路运输中产生的,如高速铁路、城市铁路、重载铁路等。它是轮轨动力相互作用的主要激励因素之一,它会给车辆及其部件带来额外的振动和噪声,导致故障甚至脱轨的危险。建立了考虑电动机通过齿轮传动向轮对传递牵引力的重载机车动力学模型,研究了重载机车的非线性动力学响应。该动力学模型将车辆、轨道和齿轮传动的运动耦合在一起。在该动力学模型中,考虑了轮轨波纹、轮轨非线性接触、时变啮合刚度和非线性齿轮间隙的激励。在此基础上,对机车的动力响应进行了数值模拟。计算结果表明,在不同振幅和波长的轨波激励下,可以观察到不同的非线性现象。由时变网格刚度激发的高频振动通常由钢轨波纹引起的低频振动调制。然而,在具有一定波纹波长的混沌条件下,这可能会消失。随着波纹幅值的增大,车辆和齿轮传动的振动水平普遍增大。然而,一些波纹长度对动力系统的振动影响更大,在机车运行中应引起高度重视。同时,齿轮传动系统的参与将导致轮对在轮轨波纹和齿轮啮合激励下产生不同的动力响应。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
NONLINEAR DYNAMIC RESPONSES OF LOCOMOTIVE EXCITED BY RAIL CORRUGATION AND GEAR TIME-VARYING MESH STIFFNESS
Rail corrugation is usually generated in modern railway transportations, such as high-speed railway, urban railway, and heavy-haul railway. It is one of the major excitations to the wheel–rail dynamic interaction, which will cause extra vibration and noise, failures, or even risk of derailment to the vehicle and its components. A dynamics model of a heavy-haul locomotive considering the traction power from the electric motor to the wheelset through gear transmission is employed to investigate the nonlinear dynamic responses of the locomotive. This dynamics model couples the motions of the vehicle, the track, and the gear transmission together. In this dynamics model, excitations from the rail corrugation, the nonlinear wheel–rail contact, the time-varying mesh stiffness, and the nonlinear gear backlash are considered. Then, numerical simulations are performed to reveal the dynamic responses of the locomotive. The calculated results indicate that different nonlinear phenomenon can be observed under the excitation of the rail corrugation with different amplitude and wavelength. The high frequency vibrations excited by the time-varying mesh stiffness are usually modulated by the low frequency vibrations caused by the rail corrugation. However, this is likely to vanish under the chaotic conditions with some corrugation wavelength. The vibration level of the vehicle and the gear transmission increases generally with the corrugation amplitude. However, some corrugation lengths have been found to be more responsible for the vibration of the dynamics system, which should be concerned greatly during the locomotive operation. Meanwhile, involvement of gear transmission systems will cause different dynamic responses between the wheelsets under rail corrugation and gear mesh excitations.
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来源期刊
Transport
Transport Engineering-Mechanical Engineering
CiteScore
3.40
自引率
5.90%
发文量
19
审稿时长
4 months
期刊介绍: At present, transport is one of the key branches playing a crucial role in the development of economy. Reliable and properly organized transport services are required for a professional performance of industry, construction and agriculture. The public mood and efficiency of work also largely depend on the valuable functions of a carefully chosen transport system. A steady increase in transportation is accompanied by growing demands for a higher quality of transport services and optimum efficiency of transport performance. Currently, joint efforts taken by the transport experts and governing institutions of the country are required to develop and enhance the performance of the national transport system conducting theoretical and empirical research. TRANSPORT is an international peer-reviewed journal covering main aspects of transport and providing a source of information for the engineer and the applied scientist. The journal TRANSPORT publishes articles in the fields of: transport policy; fundamentals of the transport system; technology for carrying passengers and freight using road, railway, inland waterways, sea and air transport; technology for multimodal transportation and logistics; loading technology; roads, railways; airports, ports, transport terminals; traffic safety and environment protection; design, manufacture and exploitation of motor vehicles; pipeline transport; transport energetics; fuels, lubricants and maintenance materials; teamwork of customs and transport; transport information technologies; transport economics and management; transport standards; transport educology and history, etc.
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