| 基于小波变换的摩擦噪声激励源的研究 |
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| 引用本文： | 陈光雄,周仲荣.基于小波变换的摩擦噪声激励源的研究[J].机械工程学报,2003,39(2):23-27. |
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| 作者姓名： | 陈光雄 周仲荣 |
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| 作者单位： | 西南交通大学摩擦学研究所,成都,610031 |
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| 基金项目： | 国家自然科学基金资助项目(50075072)。 |
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| 摘 要： | 在往复滑动试验机上作了金属摩擦噪声试验,试验期间同时测量了摩擦噪声、摩擦振动三维加速度和名义摩擦力等动态信号,这些信号含有与摩擦振动激励源有关的信息。应用小波变换技术对这些信号进行了分解,在对应摩擦振动主频的小波分解细节分量中,可以清楚地看出激励摩擦振动的摩擦力动态分量,从而说明了摩擦噪声是由波动变化的摩擦力所引发。
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| 关 键 词： | 摩擦噪声 摩擦振动 激励源 小波变换 |
| 修稿时间： | 2002年1月4日 |
STUDY ON THE CAUSE TO EXCITE SQUEAL BASED ON WAVELET TRANSFORM |
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| Chen Guangxiong Zhou Zhongrong.STUDY ON THE CAUSE TO EXCITE SQUEAL BASED ON WAVELET TRANSFORM[J].Chinese Journal of Mechanical Engineering,2003,39(2):23-27. |
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| Authors: | Chen Guangxiong Zhou Zhongrong |
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| Affiliation: | Southwest Jiaotong University |
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| Abstract: | A series of the tests on squeal formation are carried out using a flat specimen rubbed against a ball specimen. The sound pressure level of squeal, 3-dimensional vibration accelerations of the specimen and nominal friction force are recorded during testing, which probably contain the messages on the cause to excite squeal. These signals are decomposed and analyzed using the wavelet transform technique. In the wavelet decomposing details, which correspond to the dominant frequency of the nominal friction force and inertial force, the fluctuation of the friction force is seen clearly. That demonstrates that squeal is caused by a varying friction force. |
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| Keywords: | Squeal Friction-induced vibration Excitation Wavelet transform |
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