摘要：目前，我国高铁及城轨运输事业正处于飞速发展阶段，铁路在我国的交通体系里一直占有至关重要的位置，国民经济发展离不开铁路这一重要的基础设施。近些年来，交通运输市场的竞争也更加激烈，航空、公路、水运带来了更高的挑战，因此，铁道部做出了进行第六次大提速的决定。然而，铁路第六次提速却给铁路运输部门带来经济效益的同时也给车辆检修提出了一系列的挑战：即使是高可靠性的机车车辆，由于受操作环境以及使用条件的影响，在投入运营使用中设备的固有可靠性会有所降低，列车也会发生多种故障，这样会给人民生命和财产带来一定的损失。作为承载乘客直接载体的轨道车辆，其安全性直接影响着乘客的生命安全。因此，有必要对轨道车辆进行状态检测与故障诊断来预防或避免由于车辆故障带来的不必要的损失。转向架电机轴承是轨道车辆的关键部件之一，它在轨道车辆中占有举足轻重的地位，而且其结构复杂，所以对轨道车辆转向架电机轴承的故障诊断是车辆故障诊断的热点和难点，如何对其进行高效、快速而准确地诊断是值得研究的一个重要问题。 81832

毕业论文关键词： BP神经网络；转向架轴承 ；MATLAB

Analysis and Diagnosis of Faults of Bogie Bearing in EMU

Abstract: At present, China's high-speed rail and urban rail transport business is in the rapid development stage, the railway in our country's transportation system has been occupying a vital position, the national economic development is inseparable from the railway this important infrastructure。 In recent years, the competition in the transportation market has become more intense, and aviation, road and water transport have brought higher challenges。 Therefore, the Ministry of Railways has made the sixth big speed decision。 However, the sixth speed of the railway has brought economic benefits to the railway transport sector, but also to the vehicle maintenance has put forward a series of challenges: even high reliability of the locomotive, due to the operating environment and the use of conditions, The inherent reliability of the equipment in operation will be reduced, the train will also occur a variety of failures, this will give people a certain loss of life and property。 As a vehicle carrying a direct carrier of the vehicle, its safety directly affects the safety of passengers。 Therefore, it is necessary to carry out state detection and fault diagnosis of the rail vehicle to prevent or avoid unnecessary losses due to vehicle failure。 Bogie motor bearing is one of the key components of rail vehicles, it occupies 

a pivotal position in the rail vehicle, and its structure is complex, so the rail vehicle bogie motor bearing fault diagnosis is the vehicle fault diagnosis hot and difficult, how to Its efficient, fast and accurate diagnosis is an important issue worthy of study。

KeyWords：BP neural network；bogie bearing；MATLAB                 

目录

1绪论 1

  1。1 本课题的研究目的和意义 1

  1。2 动车组转向架轴承故障诊断技术的发展趋势 1

  1。3 论文的安排及研究内容 2

2 动车组转向架轴承故障分析与工具的选用 3

  2。1动车组转向架轴承简介 3

  2。2 动车组转向架轴承故障分析 3

  2。3 MATLAB介绍 4

  2。4 MATLAB神经网络工具箱的介绍