钢丝绳隔振系统特性研究

发布时间：2018-03-20 08:26

本文选题：钢丝绳隔振器　切入点：动力学模型　出处：《中北大学》2013年硕士论文　论文类型：学位论文

【摘要】：振动问题普遍存在于动力工程技术领域的很多方面，例如，采掘设备、舰船动力设备、物流运输、重载车辆、武器系统、航天器试验与发射等都存在着振动问题。对其物理特性的研究与控制，也一直是相关行业关注的重点技术问题之一。在掌握振动、隔振基本理论和隔振器相关知识的基础上，以钢丝绳隔振器为主要研究对象，通过理论计算，制作了同向钢丝绳隔振器和反向钢丝绳隔振器，对其静力学模型进行了分析计算；将其应用在自制的托物小车上，并建立了该隔振系统动力学模型，且对其隔振特性进行了实验研究和对比；最后，采用最小二乘辨识法对所建立的动力学模型进行了参数识别。目的在于解决实际生产过程中碰到的振动冲击问题，减小振源对设备的不良影响，对钢丝绳隔振器的设计及隔振器的性能了解都会有所提高。静态实验结果表明，钢丝绳隔振器静态试验稳定性十分好，经多次长时间最大压缩变形无明显机械损伤；钢丝绳隔振小车动态实验结果表明，钢丝绳隔振器具有非线性特性，在X，Y，Z三个方向均有较好的隔振效果；所制作的钢丝绳隔振小车的固有频率大概在350 400Hz频段内；有较宽的隔振优势频带，在100 330Hz频段内，X，Y，，Z三个方向均具有较好的传递性；通过对所建立的隔振系统的动力学模型进行参数识别，比较参数辨识的结果经理论计算得出的频响函数曲线与实验测得的频响函数曲线拟合情况，表明两者有较好的一致性，证实了所建立的隔振系统的动力学模型的有效性，及基于最小二乘法的参数辨识法的可信性。
[Abstract]:Vibration problems are common in many aspects of power engineering technology, such as extractive equipment, ship power equipment, logistics transportation, heavy-duty vehicles, weapon systems, There are vibration problems in spacecraft test and launch, and the research and control of its physical characteristics has always been one of the key technical problems concerned by related industries. On the basis of mastering the basic theory of vibration, vibration isolation and relative knowledge of vibration isolator, taking the wire rope vibration isolator as the main research object, through the theoretical calculation, the syndromic wire rope isolator and the reverse wire rope isolator are made. The static model is analyzed and calculated, the dynamic model of the vibration isolation system is established, and the vibration isolation characteristics are studied and compared. The method of least square identification is used to identify the parameters of the dynamic model. The purpose of this paper is to solve the problem of vibration shock in the actual production process and to reduce the adverse effect of vibration source on the equipment. The design of wire rope isolator and the performance of the isolator will be improved. The static test results show that the static test stability of the wire rope isolator is very good, and the mechanical damage is not obvious after several times of maximum compression deformation, and the dynamic experiment results of the wire rope vibration isolator show that the wire rope isolator has nonlinear characteristics. It has good vibration isolation effect in all three directions, the natural frequency of the steel wire rope vibration isolator is about 350 ~ 400 Hz, and there is a wide dominant frequency band for vibration isolation, which has good transmission in all three directions in the 100 ~ 330Hz frequency band. Through the parameter identification of the dynamic model of the vibration isolation system, the fitting of the frequency response function curve obtained by the theoretical calculation and the experimental frequency response function curve is compared, which shows that there is a good agreement between them. The validity of the dynamic model of the vibration isolation system and the credibility of the parameter identification method based on the least square method are verified.
【学位授予单位】：中北大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TB535.1

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