The Multi-Objective Optimal Design on the Space Multi-Stage Gear Transmission System Under High Efficiency and Less Mass

Author(s):  
Rui-Qin Hao ◽  
Ze-Guang Han
2019 ◽  
Vol 25 (10) ◽  
pp. 1653-1662 ◽  
Author(s):  
Wei Li ◽  
Jingdong Sun ◽  
Jiapeng Yu

The two-parallel shaft gear transmission system is the most widely used system among the multi-stage gear transmission systems. The dynamic characteristics analysis of the two-parallel shaft gear transmission system is of great significance for nonlinear behavior research and noise control of gear transmission systems. This paper establishes a dynamic model and equations for the two-parallel shaft gear transmission system. According to the solution to the dynamic equations, the effects are studied of parameters such as speed, damping, modulus, and precision on the dynamic characteristics of the system. The results provide the basis for reducing vibration and noise control in multi-stage gear transmission systems.


2021 ◽  
Vol 104 (3) ◽  
pp. 003685042110356
Author(s):  
Hexu Yang ◽  
Xiaopeng Li ◽  
Jinchi Xu ◽  
Zemin Yang ◽  
Renzhen Chen

According to the working characteristics of a 1.5 MW wind turbine planetary gear system under complex and random wind load, a two-parameter Weibull distribution model is used to describe the distribution of random wind speed, and the time-varying load caused by random wind speed is obtained. The nonlinear dynamic model of planetary gear transmission system is established by using the lumped parameter method, and the relative relations among various components are derived by using Lagrange method. Then, the relative relationship between the components is solved by Runge Kutta method. Considering the influence of random load and stiffness ratio on the planetary gear transmission system, the nonlinear dynamic response of cyclic load and random wind load on the transmission system is analyzed. The analysis results show that the variation of the stiffness ratio makes the planetary gear have abundant nonlinear dynamics behavior and the planetary gear can get rid of chaos and enter into stable periodic motion by changing the stiffness ratio properly on the premise of ensuring transmission efficiency. For the variable pitch wind turbine, the random change of external load increases the instability of the system.


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