【作者】 陆波；

【导师】 朱才朝；

【作者基本信息】 重庆大学 ， 机械设计及理论， 2009， 博士

【摘要】 课题来源于国家“十一五”科技支撑计划“高速、重载、精密机械传动系统共性关键技术研究”(2006BAF01B07-01)。为了适应国家重大装备与重点工程的需要,齿轮传动正朝着高速、重载、低噪声、高可靠性的方向发展。以船用减速器、燃气轮机齿轮箱、风力发电齿轮箱为代表的高速、重载机械传动系统是大型机械装备的重要基础件,其性能的优劣直接影响重大机械装备的综合性能和寿命。开展对高速、重载齿轮传动系统共性技术、关键技术的研究与开发,提升机械传动零部件及其相关装备产业的国际竞争能力,具有重要理论意义和工程实用价值。论文基于齿轮啮合原理、轮齿接触分析、摩擦学和传热学、非线性系统动力学,以理论分析、有限元仿真为手段,对基于热弹耦合的大功率船用齿轮箱系统动态特性进行理论分析和实验研究。论文的主要研究内容如下:①建立大功率船用齿轮箱齿轮-转子-轴承-箱体耦合三维精细有限元模型,对系统的固有特性进行分析,得到约束情况下船用齿轮箱前20阶固有频率及振型。②在考虑热弹耦合的基础上,对齿轮接触状态进行有限元分析,研究在热弹耦合情况下轮齿接触力和变形,得出基于热弹耦合工况下齿轮时变啮合刚度。③在基于热弹耦合的时变刚度激励、误差激励和啮合冲击激励等内部激励和外部激励的影响下,对船用齿轮箱系统动态响应进行分析,得出系统的振动和结构噪声特征。④结合非线性动力学方法对系统动态响应的数值特征进行分析,分析其时间历程曲线、功率谱密度、相轨迹、庞加莱截面、最大Lyapunov指数,揭示其非线性动力学规律。⑤对船用齿轮箱的固有特性、振动和结构噪声进行实验测试,验证理论分析的正确性,归纳总结出了一套针对大型船用齿轮箱动态特性的分析计算方法。更多还原

【Abstract】 This project,“Research on common and key technologies of high-speed, heavy-duty, precise mechanical transmission system”(2006BAF01B07-01), belongs to the national science & technology pillar program in the Eleventh Five-year Plan Period of China.Adapting to the needs for the national major equipments and key projects, the gear transmission tends to be high-speed and heavy-duty and bears low noise and high reliability. The high-speed and heavy-duty mechanical transmission system, presented by the marine reducer, gear box of the gas turbine, gear box of the wind power generation, is one of the important basic components of large-scale machineries and equipments. Its quality directly affects the overall performance and longevity.Therefore, it is of great significance for China’s economic and social development to carry out the research and development on the common and key technologies of high-speed and heavy-duty gear transmission system, to improve the technology of major equipments, to upgrade the international competitiveness of the industry of mechanical transmission components and related equipments.In the thesis, based on the principles of gear meshing, tooth contact analysis, tribology and heat transfer theory, non-linear system dynamics, by means of theoretical analysis and finite element simulation, the dynamic characteristics of the high-power marine gear box system based on thermo-elastic coupling is studied and verified by tests. The major content is as follows:①A 3-dimensional finite element model of a coupled gear-rotor-bearing-housing system of a heavy duty marine gearbox is developed. The dynamic characteristics is analyzed and the first 20 orders of natural frequency and mode shape of the marine gearbox under constrained condition are obtained②The finite element analysis is performed to explore the tooth contact force and deformation in the case of thermo-elastic coupling. The time-varying gear mesh stiffness under the thermo-elastic coupling conditions is gained.③The dynamic response analysis of the marine gear box system is performed under the influence of the internal excitation, i.e. the time-varying stiffness excitation, transmission error excitation and tooth impact excitation external excitation and the external excitation. The feature of the vibration and noise is obtained. ④Methods of nonlinear dynamics are applied to analyze numerical characteristics of system dynamic response, i.e. time course curves, power spectral density, phase traces and Poincare maps, the maximum Lyapunov exponent, to reveal the principles of non-linear dynamics.⑤The inherent characteristics, structure vibration and noise of the marine gearbox are tested and the results verify the correctness of the theoretical analysis. Methods of analyzing the dynamic characteristics of a large marine gear box are summarized.更多还原