调谐质量阻尼器对隔振系统的性能影响研究

发布时间：2018-05-23 07:38

本文选题：隔振系统 + 调谐质量阻尼器　；参考：《沈阳工业大学》2014年硕士论文

【摘要】：隔振系统作为控制振动传输过程中隔离振动的重要手段，在工程实际有着大量应用。调谐质量阻尼器（TMD）在振动控制方面也有着大量的应用。但在以往的调谐质量阻尼器系统的设计中，，大都以调谐质量阻尼器连接在刚性地基上为基础。然而在实际情况中，地基并非完全刚性，因此本文主要研究地基为弹性下，调谐质量阻尼器对隔振效果的影响，利用振动理论及分析方法，同时结合MATLAB编程，分别对附加TMD及MTMD的单自由度隔振系统、附加TMD的两自由度隔振系统进行动力学分析及优化，得到对影响隔振系统振动效果较大的参数。本文主要进行了以下工作：（1）对隔振系统的基本原理及TMD和MTMD的减振机理及其相关参数的优化设计方法进行了介绍与讨论，并利用数值仿真方法，分别讨论了TMD的质量比、频率比、阻尼比对减振效果的影响。（2）通过对弹性基础上带有TMD及MTMD的单自由度隔振系统、弹性基础上带有TMD的两自由度隔振系统进行了物理及数学建模。对弹性基础上带有TMD的单自由度隔振系统讨论了TMD的质量比、频率比及阻尼比对隔振系统隔振效果的影响。（3） MTMD作为TMD的一种扩展，本文着重讨论了MTMD总质量比相同数量不同和MTMD单质量比相同数量不同两种在优化后的情况下对隔振系统的力传递率的影响。之后又对不同基础频率对带有MTMD的隔振系统进行了隔振性能分析。（4）两自由度的隔振系统不仅考虑了隔振系统垂直方向的振动，同时也考虑的隔振系统的转动问题。在两自由度隔振系统上附加TMD以期同时控制其两自由度的振动。通过以上工作，以隔振系统力传递率为优化问题的优化目标仿真结果表明，在隔振系统上附加TMD或MTMD可以对隔振系统的隔振效果起到良好效果，特别是当基础的固有频率在隔振系统的固有频率附近时。利用TMD控制两自由度隔振系统时，单TMD无法同时对隔振系统的两个自由度进行控制。
[Abstract]:As an important means to control vibration transmission, vibration isolation system is widely used in engineering. Tuned mass damper (TMD) is also widely used in vibration control. But in the previous design of tuned mass dampers, the tuned mass dampers are mostly based on rigid foundation. However, in practice, the foundation is not completely rigid, so this paper mainly studies the effect of tuned mass dampers on vibration isolation effect under elastic foundation, using vibration theory and analysis method, and combining with MATLAB programming. The dynamic analysis and optimization of the vibration isolation system with single degree of freedom and MTMD and the vibration isolation system with two degrees of freedom with TMD are carried out, and the parameters that affect the vibration effect of the isolation system are obtained. The main work of this paper is as follows: 1) the basic principle of vibration isolation system, the vibration absorption mechanism of TMD and MTMD and the optimization design method of relative parameters are introduced and discussed. The mass ratio and frequency ratio of TMD are discussed by using numerical simulation method. The effect of damping ratio on damping effect. 2) the physical and mathematical models of a single degree of freedom vibration isolation system with TMD and MTMD on elastic foundation and two degrees of freedom isolation system with TMD on elastic foundation are established. The effects of mass ratio, frequency ratio and damping ratio of TMD on isolation system with TMD on elastic foundation are discussed. 3) as an extension of TMD, this paper mainly discusses the effect of two kinds of MTMD on the force transfer rate of vibration isolation system under optimized conditions: the same quantity of MTMD and the same quantity of MTMD. Then the vibration isolation performance of the vibration isolation system with MTMD is analyzed with different basic frequencies. The vibration isolation system with two degrees of freedom not only considers the vertical vibration of the isolation system, but also considers the rotation of the isolation system. In order to control the vibration of two degrees of freedom at the same time, TMD is added to the vibration isolation system of two degrees of freedom. Through the above work, the simulation results show that adding TMD or MTMD to the vibration isolation system can have a good effect on the vibration isolation system, taking the force transfer rate of the isolation system as the optimization objective, the simulation results show that the vibration isolation system can be effectively isolated by adding TMD or MTMD to the vibration isolation system. Especially when the natural frequency of the foundation is near the natural frequency of the vibration isolation system. When TMD is used to control the vibration isolation system of two degrees of freedom, the single TMD can not control the two degrees of freedom of the isolation system at the same time.
【学位授予单位】：沈阳工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TB535.1

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