【作者】 刘欣；

【导师】 刘建平；

【作者基本信息】 天津大学 ， 机械设计及理论， 2007， 硕士

【摘要】 虚拟样机技术作为一项新的产业技术,已经开始应用到各个领域,并显示出了巨大的技术优势。基于虚拟样机技术的行星齿轮传动动力学研究,已成为行星齿轮传动动态设计与数字化设计的关键所在,对机械工业的发展具有重要的现实意义。本文以2K-H型直齿行星传动为例,基于ADAMS平台,对直齿行星传动的平移—扭转耦合振动进行了深入的研究。本文的主要内容如下:1.对直齿行星传动的平移—扭转耦合模型进行了深入分析,修正了行星轮与系杆的相对位移表达式,进而建立了NGW型直齿行星传动的修正平移—扭转耦合模型,并通过固有特性分析将修正模型与原模型进行了比较。首次建立了NW型直齿行星传动的平移—扭转耦合模型,结合具体算例进行了固有特性分析,揭示了NW型直齿行星传动的3种典型振动模式,并研究了构件支承刚度对系统固有频率的影响。2.建立了定轴齿轮传动的等效分析模型,解决了传统理论模型的ADAMS实现问题。建立了直齿行星传动的等效平移—扭转耦合模型,通过ADAMS/Linear和ADAMS/Vibration模块实现了系统的固有特性分析,并对等效模型的固有频率与振型进行了研究,与直齿行星传动的修正平移—扭转耦合模型进行了比较。3.以Hertz弹性接触理论为基础,建立了定轴齿轮传动的动力学模型,研究了支承刚度对齿轮啮合力的影响。利用UG设计了NGW型及NW型直齿行星传动的实体模型,并进行了运动学仿真研究。利用UG与ADAMS的通信技术,创建了NGW型直齿行星传动的虚拟样机,并着重研究了构件支承刚度对动态啮合力的影响。更多还原

【Abstract】 As a new industry technology, virtual prototyping (VP) has been used in many fields and shown obvious advantages over the conventional design techniques. The dynamics of planetary gear trains (PGT) based on VP has been the key of the dynamic design and digital design for PGT, which has realistic meaning to the development of mechanical industry. In this dissertation, the transverse-torsional coupling vibration of 2K-H spur PGT is investigated by means of Automatic Dynamic Analysis of Mechanical System (ADAMS). The major achievements are listed as followings:1. A modified transverse-torsional dynamic model for NGW type of spur PGT is established by correcting the relative displacement expressions between the carrier and the planet gear, and the calculation results of the two models are compared. Similarly, transverse-torsional dynamic model is established for NW type of spur PGT for the first time. The natural frequencies and vibration modes of the system are investigated thoroughly and the influence of the bearing stiffness is analyzed.2. An equivalent analytical model of the conventional gear system is established to solve some problems in gear vibration modeling by ADAMS. An equivalent transverse-torsional dynamic model for spur PGT is established. The analysis of dynamic characteristic is carried out by ADAMS/Linear and ADAMS/Vibration and the results are compared by theoretical model.3. The conventional gear train is modeled in ADAMS based on the Hertz formula and the influence of bearing stiffness on meshing force is investigated. A 3D model for NGW/NW type of spur PGT is designed in Unigraphics(UG) to carry out the kinetic simulation. A VP model for NGW type of spur PGT is established by the communication of software and the influence of the bearing stiffness is researched.更多还原