骨钻行星齿轮传动系统的动力学特性及振动噪声研究

发布时间：2018-03-12 08:43

本文选题：行星齿轮减速系统　切入点：骨钻　出处：《齐鲁工业大学》2015年硕士论文　论文类型：学位论文

【摘要】：行星齿轮传动系统具有结构紧凑、承载能力大的特性,在汽车、船舶、风电设备中广泛应用。在医用小型枪式骨钻中,行星齿轮传动系统属于关键的减速和增加扭矩的功能部分,其性能对于骨钻的整体性能至关重要。行星齿轮传动系统动力学特性复杂,振动和噪声是影响系统性能和寿命的重要因素,同时对于医用设备来讲,其振动和噪声也对医生和患者的影响更加明显,直接影响到手术的质量。针对骨钻行星传动系统的实际工况特点,研究行星齿轮传动系统的动态性能,预测齿轮啮合激励对系统噪声的贡献量,有利于突破高端行星齿轮减速装置的核心技术,减少高端设备的进口依赖,推动我国医用骨钻设备的设计制造的长足发展。本文以医用骨科电钻的行星减速部分为研究对象,围绕行星齿轮传动系统的振动噪声产生机理展开研究,结合行星传动系统动力学仿真、骨钻箱体模态分析、骨钻箱体声学有限元和声学边界元分析方法指导减速机箱体结构振动噪声的控制,主要以减少振动、降低噪声、改善骨钻动力学性能为重点,从而达到减少振动、降低噪声、改善骨钻动力学性能目的。本研究主要做了以下工作：对骨钻行星齿轮传动的传动机理进行了分析,并结合齿轮系统动力学基本理论对骨钻噪声产生机理进行了分析；对骨钻行星齿轮传动部分主要部件进行了三维建模；建立起了骨钻行星传动系统的虚拟样机模型,分析求解了额定工况下骨钻箱体振动噪声的主要激励；对骨钻箱体进行了模态分析并对主要振型做了相关描述；基于动力学仿真以及模态分析结果,对额定工况下骨钻箱体结构表面振动的响应进行求解；分别利用声学有限元和声学边界元法结合骨钻箱体表面振动结果对骨钻箱体进行结构噪声预测,并提取和分析了场点处的声压频率图谱,获得了声学模态贡献图谱,确定了对声压贡献较大的模态阶数,在此基础上制定了骨钻箱体结构噪声控制方案,并对相关方案进行了仿真分析。
[Abstract]:The planetary gear transmission system is widely used in automobile, ship and wind power equipment because of its compact structure and high bearing capacity. Planetary gear transmission system belongs to the key function of reducing speed and increasing torque, and its performance is very important to the overall performance of bone drill. Vibration and noise are important factors that affect the performance and life of the system. At the same time, for medical equipment, the effects of vibration and noise on doctors and patients are more obvious. According to the actual operating conditions of the planetary transmission system of bone drill, the dynamic performance of the planetary gear transmission system is studied, and the contribution of gear meshing excitation to the system noise is predicted. It is helpful to break through the core technology of the high-end planetary gear deceleration device, reduce the import dependence of the high-end equipment, and promote the rapid development of the design and manufacture of the medical bone drill equipment in China. This paper takes the planetary deceleration part of the medical orthopedic electric drill as the research object. The mechanism of vibration and noise generation of planetary gear transmission system is studied. Combined with the dynamic simulation of planetary transmission system, the modal analysis of bone drill box is carried out. The acoustic finite element method and acoustic boundary element analysis method of bone drill box are used to guide the vibration and noise control of reducer box structure. The emphasis is mainly on reducing vibration, reducing noise and improving the dynamic performance of bone drill so as to reduce vibration and noise. The purpose of this study is to improve the dynamic performance of bone drill. The main work of this study is as follows: the transmission mechanism of bone drill planetary gear transmission is analyzed, and the mechanism of bone drill noise generation is analyzed based on the basic theory of gear system dynamics; The 3D modeling of the main parts of the bone drill planetary gear transmission is carried out, and the virtual prototype model of the bone drill planetary transmission system is established, and the main vibration and noise excitation of the bone drill box under rated working conditions is analyzed and solved. Based on the dynamic simulation and modal analysis results, the response of the surface vibration of the bone drill box under rated conditions is solved. The acoustic finite element method and the acoustic boundary element method are used to predict the structural noise of the bone drill box, and the frequency spectrum of sound pressure at the field point is extracted and analyzed, and the acoustic modal contribution map is obtained. The modal order which contributes a lot to the sound pressure is determined. On the basis of this, the noise control scheme of the bone drill box is established, and the related scheme is simulated and analyzed.
【学位授予单位】：齐鲁工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TH132.425

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