The Dynamics Analysis And Optimization Of Planetary Gear Drive System Of A Tracked Armored Vehicle

Planetary gear transmission is applied in the marine vessels,aircrafts,automobiles and heavy machinery, because it has many advantages such as smaller mass,smaller volume,larger transmission ratio,better loading capactiy, transmission smooth and higher transmission efficiency compared with ordinary fixed axis gear transmission. gear systems are generally developed to high-speed, heavy direction. in order to improve the transmission efficiency. as the line velocity and load caused by vibration, noise, load, deformation, stress and other factors seriously affect the system's security and stability in the transmission process, therefore, to enhance high-quality and performance gear transmission system research is the basis of industrial development of Chinese urgent needs.The paper's major research is the sensitivity analysis and optimization design of planetary gear system, it introduced the sensitivity analysis into optimization design of planetary gear system's structural parameters. The optimal design of a tradition is based on experience and some empirical formula to obtain the optimal design goals in general., it has a certain blindness,and it needs a long computing time. the structural analysis and optimization of the use of finite element method with sensitivity analysis and optimal design method can effectively improve the optimum design efficiency and reduce computing time.A NGW planetary gear transmission of the planetary gear's 3D solid model is built in the paper, and it studied the diesel connecting rod reality force condition, the border condition and exertsload by appling finite element method. Through analysis and calculation, locate the planetary gear tooth's largest equivalent stress. After that, the sensitivity analysis of structure parameters of planetary gear transmission is done, a greater impact on the stress of the structure of gear design parameters are achieved by sensitivity analysis, to establish the structural parameters as a design variable mathematical model of optimal design planetary gear, in the conditions of meeting constraints, to optimize the design of the gear system, reduce the planetary gear tooth's largest equivalent stress. Complete the structural parameters of the planetary gear improved and to carry out dynamic simulation. it studies influence of the optimization of planetary gear's structural parameters on the planetary gear dynamic characteristics, and it provides a more effective method for other complex structural optimization design study.