[1]王兆文,覃国宇,郭 凯,等.内燃机配气机构气门振动解析方法研究[J].内燃机学报,2021,(02):176-185.
　Wang Zhaowen,Qin Guoyu,Guo Kai,et al.Study on the Analytical Method of Valve Vibration in Valve Train of Internal Combustion Engine[J].,2021,(02):176-185.
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内燃机配气机构气门振动解析方法研究
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《内燃机学报》[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2021年02
页码:
176-185
栏目:
出版日期:
2021-03-25

文章信息/Info

Title:
Study on the Analytical Method of Valve Vibration in Valve Train of Internal Combustion Engine
作者:
王兆文; 覃国宇; 郭 凯; 常伟杰; 汪 鑫; 成晓北
(1. 华中科技大学 能源与动力工程学院，湖北 武汉 430074；2. 中国船舶重工集团公司第七一一研究所，上海 201108)
Author(s):
Wang Zhaowen1; Qin Guoyu1; Guo Kai1; Chang Weijie2; Wang Xin1; Cheng Xiaobei1
(1. School of Energy and Power Engineering，Huazhong University of Science & Technology，Wuhan 430074，China；2. Shanghai Marine Diesel Engine Research Institute，Shanghai 201108，China)
关键词:
内燃机; 配气机构; 气门振动; 经验模态分解; 连续小波变换; 短时傅里叶变换
Keywords:
internal combustion engine; valve train; valve vibration; empirical mode decomposi-tion(EMD); continuous wavelet transform(CWT); short-time Fourier trans-form(STFT)
分类号:
TK421
文献标志码:
A
摘要:
对比经验模态分解(EMD)方法、短时傅里叶变换(STFT)和连续小波变换(CWT)方法对内燃机配气机构气门振动解析，结果表明：EMD方法解析过程简单、具有较高的自适应性，但不能解决频率混叠问题；STFT方法因为时间分辨率和频率分辨率相互制约，存在解析精度低的缺点；CWT方法虽然计算量大，解析过程复杂，但是解析精度最高．通过CWT方法，原始气门加速度信号可以分解为凸轮加速度、燃烧振动、气门摇臂碰撞振动、凸轮振动、气流振动、气门落座振动和相邻气门振动等振动信号．其中气门落座振动、气门摇臂碰撞振动是气门振动的最主要来源，应该重点优化．
Abstract:
After the decomposition of valve vibration in valve train of internal combustion engine by means of empirical mode decomposition(EMD)，short-time Fourier transform(STFT)and continuous wavelet transform (CWT) methods，it is found that the decomposition and analysis process of EMD method is simple and adaptive，but it cannot solve the problem of frequency aliasing. STFT method has the disadvantage of low analytic accuracy be-cause of the mutual restriction of time resolution and frequency resolution. CWT method has a large amount of cal-culation and its decomposition process is much complex，but the decomposition accuracy is the highest. Through the CWT method，the original valve acceleration signal can be decomposed into cam acceleration，combustion vibration，valve rocker collision vibration，cam vibration，airflow vibration，valve-seating vibration，adjacent valve vibration and other component signals. Among them，valve-seating vibration and valve rocker collision vi-bration are the most important sources of valve vibration，and should be focused in the optimization processes.

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更新日期/Last Update: 2021-03-25