某履带式车辆主轴系统振动特性研究

发布时间：2018-01-01 11:15

本文关键词：某履带式车辆主轴系统振动特性研究　出处：《重庆大学》2016年硕士论文　论文类型：学位论文

【摘要】：目前,对于绝大多数重型车辆来说,主轴系统在整个综合传动系统中起着举足轻重的作用。当来自主轴本身的不平衡质量、发动机、路面或者齿轮的啮合冲击产生的周期性扭转激励的频率和主轴系统的固有频率相同时,则主轴发生共振,主轴系统将承受很大的共振载荷,极易导致传动系统零部件的突然损坏。为了保证转动机械长期安全运行,本文以主轴转子系统为研究对象,对其进行关于振动特性的研究,主要开展以几个部分内容:首先,建立主轴转子系统振动动力学模型。考虑轴承支承刚度、齿轮啮合刚度的影响,采用集总参数法分别建立主轴转子-轴承系统横向振动动力学模型、主轴转子系统扭转振动动力学模型和主轴转子-行星齿轮系统扭转振动动力学模型。其次,基于主轴转子-轴承系统横向振动动力学模型,采用传递矩阵法计算其临界转速及振型,分析轴承支承刚度对主轴转子系统临界转速的影响规律,以及在不同稳定工况下,主轴转子系统典型位置的不平衡响应特征。再次,基于主轴转子系统扭转振动动力学模型,采用传递矩阵法计算其固有频率及振型,分析典型构件转动惯量对主轴转子系统扭转振动固有频率的影响规律。最后,基于主轴转子-行星齿轮系统扭转振动动力学模型,采用整体传递矩阵法分别计算行星齿轮系统和主轴转子系统扭转振动的固有频率和振型,分析啮合刚度对主轴转子系统扭转振动固有频率的影响规律。
[Abstract]:At present, for the vast majority of heavy vehicles, the spindle system plays an important role in the whole integrated transmission system. When the unbalance mass of the spindle itself, engine, gear meshing impact or periodic pavement produces natural frequencies of torsional excitation frequency and spindle system is the same, the spindle resonance, spindle system will bear a great load resonance, can easily lead to sudden damage to parts of the transmission system. In order to ensure the long-term safe operation of the rotating machinery, the spindle rotor system as the research object, research on the vibration characteristics of the main to carry out several parts as follows: firstly, establish the vibration of the main shaft rotor system dynamics model considering the bearing stiffness. Degree of influence of gear meshing stiffness, established dynamic model of transverse vibration of the rotor bearing system using the lumped parameter method of spindle Vibration dynamic model of torsional vibration dynamic model of spindle rotor and a planetary gear system torsional rotor system. Secondly, the transverse vibration of spindle rotor bearing system model based on the transfer matrix method to calculate the critical speed and vibration mode analysis, the bearing stiffness of the main shaft rotor system, as well as in different stable condition next, the unbalance response characteristics of spindle rotor system typical position. Again, torsional vibration dynamic model of spindle rotor system based on the transfer matrix method for calculating the natural frequency and vibration mode, analysis of the typical components of inertia effect of vibration frequency on the spindle rotor system of torsional vibration dynamic model. Finally, the torsional spindle rotor planet based on the torsional vibration of gear system, the whole transfer matrix method to calculate the planetary gear system and the spindle rotor system. With frequency and vibration mode, the influence of meshing stiffness on the natural frequency of the torsional vibration of the spindle rotor system is analyzed.

【学位授予单位】：重庆大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：U469.694

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