## MATLAB高速列车齿轮箱振动分析研究

Vibration analysis of high speed train gearbox
Abstract：With the continuous development of science and technology, machinery and equipment are developing towards the direction of high performance, high automation, high efficiency and high reliability. Gearbox is one of the most important parts in the mechanical field. It plays an important role of connection and transmission power, due to its outstanding mechanical properties and in various fields are widely used, but also the most prone to failure of a components. And in the machinery and equipment, use frequency of the gear is very high, so the gear fault diagnosis technology of machine quality and service life of the very important role. This paper uses MATLAB software respectively, fault of the gear box fault in the fault of gear and shaft imbalance of spectrum analysis and cepstrum analysis. The spectrum analysisof vibration signals is described by a mathematical method to transform the frequency domaindescription, then carries on the analysis. Cepstrum analysis is the essence of the powerspectrum of logarithm, then the spectrum analysis, get the periodic components in the spectrum. The bearing fault spectrum analysis and envelope spectrum analysis. Envelope analysis method, a vibration signal based on detection filtering processing method, before the spectrum analysis, need first to signal high pass or band-pass filter, filter out low frequency components, then the signal envelope demodulation to extract low frequency modulation signal. Analysis of gearbox fault through the fault information in spectrum.

Key word：Gear box；Fault diagnosis；Signal analysis；MATLAB；High speed train

1 绪论    1
1.1 课题的研究目的和意义    1
1.2 国内外研究现状与水平    1
1.3 发展趋势    3
1.4 主要工作内容    3
2 齿轮箱故障诊断基本理论    4
2.1 齿轮箱故障的主要形式    4
2.2 齿轮箱典型故障形式    4
2.3 齿轮振动机理    5
2.3.1 齿轮啮合调制机理分析    5
2.4 齿轮常见故障形式    7
2.5 齿轮箱轴承故障    9
2.6 转子故障    11
2.7 本章小结    12
3 齿轮箱振动常用分析方法    13
3.1振动信号的分类    13
3.1.1确定性信号    13
3.1.2 随机信号    14
3.2常见的信号分析方法    14 MATLAB高速列车齿轮箱振动分析研究:http://www.lwfree.cn/zidonghua/20181030/25300.html
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