二轴转台结构设计及动力学特性分析

发布时间：2018-02-28 01:30

本文关键词： 二轴转台结构设计有限元优化设计　出处：《长春理工大学》2013年硕士论文　论文类型：学位论文

【摘要】：转台是一种主要的跟踪测试系统装置,在航天领域、航空领域、海洋检测、大气信道的无线激光等军民用领域上都有广泛的应用。此外转台的结构设计将直接影响到所要工作转台的跟踪精度,从而影响到整个系统最终的工作性能,本文以实际激光通信工程项目为背景,设计出了转台的总体结构及其动力学分析。本文根据技术指标,对转台进行了总体的组成设计,设计出满足要求的“U-O”型二轴转台。根据有限元的理论知识,以ANSYS有限元分析软件为基础,对二轴仿真转台的机械结构进行了力学分析,通过对转台进行的静力学计算得到转台的应力和位移的变形情况,该二轴转台基本满足了强度和刚度的要求；通过模态分析计算,得到了相应的振动频率、振幅和振型云图,对于结构设计的频率响应要求来说不会发生共振,可以保证转台的跟踪精度。最后根据静、动态的分析结果,对二轴转台初始方案的机械结构设计、实用性等方面提出了对外框、内框及基座的结构改进方案。并对改进方案进行分析计算,确保改进后结构满足转台静动态特性要求,也为以后有关二轴转台的设计提供了有利的工具和有效的参考依据。
[Abstract]:Turntable is a major tracking and testing system, in the aerospace, aviation, ocean detection, In addition, the structure design of the turntable will directly affect the tracking accuracy of the turntable, thus affecting the final working performance of the whole system. In this paper, the overall structure and dynamic analysis of the turntable are designed under the background of the actual laser communication project. In this paper, according to the technical specifications, the overall composition of the turntable is designed, and the "U-O" type two-axis turntable is designed to meet the requirements. According to the theoretical knowledge of finite element, the ANSYS finite element analysis software is used as the foundation. The mechanical structure of the two-axis simulation turntable is analyzed. The stress and displacement deformation of the turntable is obtained by statics calculation of the turntable. The two-axis turntable basically meets the requirements of strength and stiffness. The corresponding vibration frequencies, amplitudes and mode shapes are obtained, which can ensure the tracking accuracy of the turntable because there is no resonance for the frequency response requirements of the structural design. Finally, according to the static and dynamic analysis results, the structural improvement scheme of the external frame, the inner frame and the base is put forward in the aspects of the mechanical structure design and practicability of the initial scheme of the two-axis turntable, and the improved scheme is analyzed and calculated. The improved structure meets the static and dynamic characteristics of the turntable, and provides a favorable tool and effective reference for the design of the two-axis turntable in the future.
【学位授予单位】：长春理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TH122

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