齿轮箱的减振降噪优化设计方法研究

发布时间：2018-03-18 02:04

本文选题：齿轮箱　切入点：模态贡献量　出处：《大连理工大学》2012年硕士论文　论文类型：学位论文

【摘要】：齿轮箱传动系统凭借其传动效率高、承载能力强、传动比精确、工作可靠、结构紧凑、寿命长等优点,在现代工业领域得到了广泛的应用。随着各行业的不断发展,对齿轮箱传动系统提出了许多更新、更高的要求,因此,齿轮箱传动系统在这种推动力的作用下正朝着高速、重载、轻量化、智能化等方向发展。在这些目标的实现过程中,振动、噪声问题显的尤为突出,也是亟待解决的问题。本文应用模态试验、多体动力学方法、有限元方法、边界元方法等手段,以某振动试验台传动齿轮箱为研究对象,对其进行了激励力的仿真求解、模态仿真和试验分析、箱体稳态振动响应分析、模态贡献量分析、声学面板贡献量分析、基于振速法原理的主要面板声功率级求解、灵敏度分析,最终通过优化方法对齿轮箱箱体的振动、噪声特性进行了优化计算并进行了验证。本文具体工作如下： (1)齿轮对啮合过程仿真。应用Solidworks软件完成了齿轮箱系统的三维建模,将齿轮对啮合系统导入到ADAMS软件中完成多体动力学建模,进行刚性体动力学分析,获得了齿轮箱运行过程中,轴承部位所受到的动态载荷； (2)模态试验与模态仿真计算。对齿轮箱箱体的固有振动特性进行分析,并在此基础上利用有限元优化方法对箱体有限元模型进行了修正,使有限元模型更加符合真实结构； (3)振动响应计算。基于ANSYS软件的谐响应分析模块,对齿轮箱箱体的稳态振动响应进行了求解,并对模态贡献量进行分析,识别主要贡献模态； (4)声学仿真计算。基于LMS Virtual.Lab Acoustics声学仿真模块对箱体各面板声学贡献量进行了分析,识别出主要声学贡献面板； (5)振速法声功率级求解。结合振速法原理,利用谐响应计算结果对主要面板的辐射声功率级进行求解作为优化目标函数,该优化目标函数能够全面兼顾结构振动与噪声特性； (6)灵敏度分析。应用灵敏度原理,对齿轮箱箱体各设计变量对目标函数的灵敏度进行分析； (7)优化求解。应用ANSYS软件的优化求解模块对齿轮箱箱体进行优化设计,寻找其最优的壁面厚度组合,以达到减振、降噪的目的,并对结果验证进行验证。
[Abstract]:Gearbox transmission system has been widely used in modern industry with its advantages of high transmission efficiency, strong bearing capacity, accurate transmission ratio, reliable operation, compact structure, long life, etc. With the continuous development of various industries, gearbox transmission system has been widely used in the field of modern industry. Many new and higher requirements have been put forward for the gearbox transmission system. Therefore, the gearbox transmission system is developing in the direction of high speed, heavy load, light weight, intelligence and so on under the action of this kind of driving force. Vibration, noise problems are particularly prominent, is also a problem to be solved. In this paper, modal test, multi-body dynamics method, finite element method, boundary element method and so on are used to study the transmission gearbox of a vibration test rig. The excitation force is solved by simulation, modal simulation and experimental analysis are carried out. Static vibration response analysis, modal contribution analysis, acoustic panel contribution analysis, main panel acoustic power level solution based on the principle of vibration velocity method, sensitivity analysis, and finally the vibration of the gearbox box by optimization method. The noise characteristics are optimized and verified. The specific work of this paper is as follows:. 1) the simulation of gear pair meshing process. The three-dimensional modeling of gear box system is completed by using Solidworks software. The gear pair meshing system is introduced into ADAMS software to complete the multi-body dynamics modeling, and the rigid body dynamics analysis is carried out. The dynamic load on the bearing part during the operation of the gearbox is obtained. (2) Modal test and modal simulation calculation. The inherent vibration characteristics of the gearbox box are analyzed, and the finite element model of the box body is modified by the finite element optimization method to make the finite element model more accord with the real structure. Based on the harmonic response analysis module of ANSYS software, the steady vibration response of the gearbox box is solved, and the modal contribution is analyzed to identify the main contribution modes. (4) Acoustic simulation calculation. Based on LMS Virtual.Lab Acoustics acoustic simulation module, the acoustic contribution of each panel of the box is analyzed, and the main acoustic contribution panel is identified. Combined with the principle of vibration velocity method, the radiative acoustic power level of the main panel is solved as the optimization objective function by using the harmonic response calculation results. The optimization objective function can give full consideration to the vibration and noise characteristics of the structure. Sensitivity analysis. The sensitivity of the design variables of the gearbox box to the objective function is analyzed by using the sensitivity principle. The optimization module of ANSYS software is used to optimize the design of the gearbox box, to find the best combination of wall thickness to achieve the purpose of reducing vibration and noise, and to verify the result.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH132.41

【引证文献】