盘-销摩擦系统摩擦接触力测试与特性分析

陈晶杰; 张立军; 刁坤; 孟德建; 余卓平

盘-销摩擦系统摩擦接触力测试与特性分析

陈晶杰¹,
张立军^2,3, ,,
刁坤^2,3,
孟德建^2,3,
余卓平^4,5,6

1.
同济大学中德学院,上海 200092
2.
1. 同济大学新能源汽车工程中心,上海 201804
3.
2. 同济大学汽车学院,上海 201804
4.
1. 同济大学中德学院,上海 200092
5.
2. 同济大学新能源汽车工程中心,上海 201804
6.
3. 同济大学汽车学院,上海 201804

基金项目:

国家自然科学基金项目(51175380)和中央高校基本科研业务费专项资金资助.

详细信息

中图分类号: U463.51
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出版历程
- 收稿日期: 2012-07-09
- 修回日期: 2012-11-04

Measurement and Characteristics Analysis of Frictional Contact Forces in a Pin-on-disc System

1.
CDHK of Tongji University, Shanghai 200092, China
2.
1. Clean Energy Vehicle Engineering Center of Tongji University, Shanghai 201804, China
3.
2. School of Automotive Engineering, Tongji University, Shanghai 201804, China
4.
1. CDHK of Tongji University, Shanghai 200092, China
5.
2. Clean Energy Vehicle Engineering Center of Tongji University, Shanghai 201804, China
6.
3. School of Automotive Engineering, Tongji University, Shanghai 201804, China

摘要

摘要: 测量分析动态摩擦接触力是研究摩擦振动与噪声发生机理的关键.本文中建立了盘-销系统摩擦尖叫试验台架,成功再现了摩擦尖叫.采用三向力传感器对有无摩擦尖叫条件下的动态摩擦接触力进行了测量,并利用小波信号分解、概率密度函数、功率谱密度函数、时频分析等方法进行了分析和讨论.研究发现:在发生摩擦尖叫时,动态摩擦力和法向力发生高频波动,是系统噪声的激励源;无摩擦尖叫时的摩擦力和法向力的动态分量为典型的白噪声随机过程,呈非高斯分布;有摩擦尖叫时的摩擦力和法向力为窄带高频类谐波信号,摩擦力呈非高斯分布,而法向力近似为高斯分布;模态耦合是导致盘-销系统发生动态接触力高频波动以及摩擦尖叫的原因.
- 盘-销系统 /
- 摩擦尖叫 /
- 动态接触力 /
- 模态耦合 /
- 信号分析
Abstract: Experimental investigation into frictional contact forces is key works on friction induced vibration and noise. In this paper, a test bench based on a pin-on-disc system was established and frictional squeal was successfully reproduced. The three direction contact forces were sampled by using a three-dimensional force transducer under squealing and non-squealing conditions. The measured signals were analyzed through wavelet decomposition, statistical probability, power spectral density and time-frequency analysis methods. It is found that the friction force and normal force had high-frequency pulsation during system squealing, and they were the excitation source of squeal. The dynamic part of friction force and normal force under non-squealing conditions were typical white-noise signals which were non-Gaussian distribution. The dynamic part of friction force was either non-Gaussian distribution, while the normal force was close to Gaussian distribution. Mode coupling mechanism was the origin of high-frequency frictional squeal and high-frequency oscillations of frictional contact forces.
- pin-on-disc system /
- frictional squeal /
- dynamic frictional contact forces /
- mode coupling /
- signal processing

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参考文献(18)

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