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- 저자 : Jing Shuangxi (검색결과 2 건)
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Chen Huitao,Fan Junkai,Jing Shuangxi,Wang Xianhui 대한기계학회 2019 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.33 No.2
In this paper, a probabilistic design optimization method for wind power gear drive system has been put forward based on the dynamic reliability. A pure torsional dynamic model of 1.5 MW wind turbine gear transmission system is developed which is based on lumped parameter method with incorporation of gear meshing stiffness and transmission error. By taking the wind load and the gear parameters as random variables, the variation in dynamic reliability of the system with time is obtained. The probabilistic optimization design model of the wind turbine gear transmission system with minimum displacement and volume is built. The parameters affecting the dynamic performance and reliability are taken as optimization design variables. The system reliability, the effects of random parameters on the reliability, the normal meshing condition and gear strength are taken as constraint conditions. We choose the gear transmission system of a 1.5 MW wind turbine for the system optimization and experimental verification. The results show that the system optimization based on dynamic reliability can reduce the volume of the system by 17.94 % and the system reliability is also guaranteed. Moreover, the vibration of each component of the system is reduced which is beneficial for smooth operation of the gear transmission system of wind turbine.
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Transverse vibration of the boring bar for BTA deep hole machining under stochastic excitation
Quanbin Zhang,Wu Zhao,Yamin Li,Shuangxi Jing 대한기계학회 2023 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.37 No.11
Taking the BTA deep hole boring bar as the object of axial flow and axial feed movement, the dynamic characteristics of the fluid-structure coupling boring bar are systematically studied. The influence of complex deformation (bending, torsion, tension, and compression) factors are considered in the derivation of dynamic characteristics. According to the force situation of the BTA deep hole boring bar, the transverse vibration equation of the BTA deep hole boring bar is established. The transverse vibration equation is discretized by Galerkin method, and then its characteristic root, response variance, and spectral density are solved to realize the transverse vibration analysis of the boring bar. Research has found that the correlation between system stability and boring bar speed is no longer monotonous. System stability is positively correlated with the equivalent stiffness and the equivalent shear modulus. There is a negative correlation between system stability and axial force, but it is not significant.
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