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《Journal of Northeastern University(Natural Science)》 2004-05
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Torsional Vibration Characteristics of Gear System with a Cracked Shaft

LI Yun-gong, LIU Jie, ZHU Qi-bing, WEN Bang-chun (School of Mechanical Engineering & Automation, Northeastern University, Shenyang 110004, China. Correspondent: LI Yun-gong, E-mail: lyneu @ 126.com)  
Based on the analysis of main parameters of gear system, such as meshing stiffness, transmission error and pitch impulse, a dynamical model of gear system with a cracked shaft is developed. The torsional vibration characteristics of cracked shaft and non-cracked shaft in gear system are studied. Because there are lots of parameters in gear system, an assumption is made that the transmitting ratio is an independent variable, so as to discuss the relationship among the torsional vibration characteristics and transmitting ratio, rotating speed and the cracked depth. The results show that the secondary and quadruple harmonic occurring at operating frequency is the main characteristic of torsional vibration, and the transmitting ratio and rotating speed are the key factors which affect the power crack-inducing vibration and its distribution on the two shafts.
【Fund】: 国家自然科学基金资助项目(50275024)
【CateGory Index】: TH113
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