【作者】 周健；

【导师】 马星国；

【作者基本信息】 沈阳理工大学 ， 机械设计及理论， 2010， 硕士

【摘要】 行星齿轮传动与普通定轴齿轮传动相比具有质量小、体积小、传动比大、承载能力大以及传动平稳和传动效率高等优点,因此其被广泛应用于船舶、飞机、汽车、重型机械等领域。为了提高传动效率,齿轮系统普遍向高速、重载方向发展。由于在传动过程中线速度和载荷所带来的振动、噪声、载荷、变形和应力等因素严重影响系统的安全性和稳定性。所以对于如何改善齿轮传动系统的质量和性能的研究是我国基础工业发展迫切需要的。本文主要的研究的是行星齿轮传动系统中的行星轮部件结构参数的灵敏度分析和优化,将灵敏度分析引入到行星轮系结构参数优化设计中,达到提高优化效率的作用。传统的优化设计研究一般是以使用经验为依据,运用一些经验公式来获得优化设计目标,这种方法具有一定的盲目性,并且需要较长的计算时间。应用有限元方法,将灵敏度分析方法应用到优化设计研究中,能够有效的提高优化设计的效率和降低计算时间。本文研究主要包括建立NGW行星齿轮系统三维实体模型;运用有限元分析方法,对行星齿轮运动过程中的受力情况、边界条件和所受载荷进行研究;通过结构分析计算,确定行星齿轮齿面最大等效应力;对行星齿轮结构参数进行灵敏度分析,确定对齿轮齿面等效应力影响较大的齿轮结构参数,将其作为设计变量建立行星齿轮优化设计数学模型;在满足优化约束的条件下,对行星轮结构进行优化设计,通过改善行星轮结构参数来达到减小行星轮齿面最大等效应力的目的。完成对行星轮结构参数改进后,对其所在的行星轮系进行刚柔耦合动力学仿真,研究行星轮结构参数优化对其动态特性的影响。为其他复杂结构优化设计研究提供了一种较为有效的方法。更多还原

【Abstract】 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.更多还原