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- 저자 : Xiuchang Huang (검색결과 2 건)
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Xiuchang Huang,Xintian Liu,Hongxing Hua 대한기계학회 2014 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.28 No.3
A novel structured ultra-low frequency nonlinear passive isolator is presented. The isolator is composed of a knife-edge supported slidingbeam which offers negative stiffness and a vertical mechanical spring in parallel to get quasi-zero dynamic stiffness. The static characteristicsof the isolator are studied. Assuming light viscous damping, the dynamic behavior is investigated and the response under harmonicexcitation is derived using a simple approximation. Frequency response curves (FRCs), which exhibit complex double jump phenomenon,are obtained by harmonic balance method (HBM). The limitation of the excitation force level is obtained. The force transmissibilityis derived and compared with an equivalent linear system with the same damping ratio. The isolation performance of the nonlinearisolator is shown to outperform the linear system for providing a wider isolation region. The influence of system parameters on thetransmissibility is examined and some useful guidelines are given.
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Dynamic modeling and analysis of axial vibration of a coupled propeller and shaft system
Chenyang Li,Xiuchang Huang,Hongxing Hua 대한기계학회 2016 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.30 No.7
The dynamic and acoustic characteristics of a coupled propeller and shaft system which is modeled by the transfer matrix method are studied. The elasticity of the propeller is taken into consideration by employing the equivalent reduced modeling method. Thus the influence of the elastic propeller on the vibro-acoustic responses of the coupled system is investigated. To reduce the axial vibration of the coupled propeller-shaft system, the influence and location of the vibration isolator on the structural and acoustic responses is presented. Simulation results demonstrate that utilizing the relationship between the natural frequency of the propeller and the resonance frequency range of the shaft can control the vibration of the coupled system without other vibration control method. Utilizing a vibration isolator is another effective way to control vibration. The optimal position for the isolator installed between the shaft and the thrust bearing is investigated.
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