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Noise Source Identification of Mining Vehicle's Cabin
MA Yan;CHEN Jian;YUAN Zheng
   2012, 32 (3): 118-120.   DOI: 10.3969/j.issn.1006-1355.2012.03.027
Abstract （1699）            Save
The noise in cabin of a domestic mining vehicle was far beyond the industry standard. Thus, according to the standard, the noise and vibration testing of the cabin was conducted. Utilizing the spectrum analysis, order tracking technique and theoretical analysis, the main noise sources and their frequency characteristics were identified. Some effective improvement strategies were proposed. Through the comparative analysis of the testing data of the improvement strategies, the correctness of the noise source identification methods were verified. The result of analysis provides a reference for the noise control of mining vehicles.
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《Comparative Analysis of Vibration Source of FourCylinder Engine Using Two Commercial Codes》
LI Shuang-hu;FAN Wen-xin;ZHAO Yan-tao;MA Yan-yan
   2010, 30 (1): 139-142.   DOI: 10.3969/j.issn.1006-1355.2010.01.139
Abstract （2076）      PDF（pc） （977KB）（1370）       Save
The vibration sources of a fourcylinder engine are analyzed using MATLAB and ADAMS codes. Firstly，the main vibration excitation sources of this engine, the second order reciprocating inertia force and the overturning moment, are gained through theoretical analysis. The characteristics of the excitation sources are investigated in both time domain and frequency domain using MATLAB code. Afterwards, the finite element model of the engine is built and the dynamic simulation is performed using ADAMS code. Then, in the postprocessing, using the measured signals in the properly selected positions，types of the main vibration excitation sources and their characteristics in both time domain and frequency domain are gained. The results from the two codes are found to be in good accordance with each other. Thus, the validity of the two methods is verified. The results gained in this paper provide some necessary data for vibration control of engines.
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