磁流变液阻尼器及其性能研究

发布时间：2018-09-14 19:17

【摘要】：磁流变液阻尼器是一种新型的半主动阻尼可控器件,其阻尼缸内的工作介质是磁流变液,磁流变液是一种由微米级磁性颗粒、载液以及添加剂等组成的悬浮液,在外加磁场的作用下可以在毫秒级的时间内变为半固态,因而可以用于控制输出的阻尼力。磁流变液阻尼器结构简单、可调范围宽、响应速度快、反应可逆和功耗低,在机械振动控制领域具有很好的应用前景。本文主要进行了以下几个方面的研究：(1)采用Bingham流体的粘塑性模型,从理论上研究了磁流变液阻尼器的设计参数对阻尼器输出阻尼力的影响,建立了磁流变液阻尼器的阻尼力计算模型,采用数值计算的方法,研究了阻尼力与外加磁场、剪切间隙之间的关系,为磁流变液阻尼器的设计提供了理论依据。(2)基于液压流体力学理论,设计了新型的磁流变液阻尼器及其密封结构,对阻尼器的磁路、活塞等参数进行了分析；采用有限元分析软件,对阻尼器内部的磁场进行了仿真研究,得到了磁流变液阻尼器内部磁场和外加电流之间的关系,为进一步磁流变液阻尼器的性能研究提供了理论依据。(3)采用丝杠传动系统、力传感器、步进电机以及数据采集系统,搭建了磁流变液阻尼器的性能测试平台；对搭建的测试平台进行了安装和调试；(4)通过改变阻尼器活塞的尺寸,从实验上研究了阻尼缸体内部剪切间隙对磁流变液阻尼器输出阻尼力的影响；通过改变阻尼器内励磁线圈中的电流强度,研究了不同的外加电流对阻尼器输出阻尼力的影响,研究结果为磁流变液阻尼器的进一步推广应用提供了实验依据。
[Abstract]:The magnetorheological fluid damper is a new type of semi-active damping controllable device. The working medium in its damping cylinder is magnetorheological fluid, which is a suspension composed of micron magnetic particles, carrier liquid and additives. The applied magnetic field can become semi-solid in millisecond order, so it can be used to control the output damping force. Magnetorheological fluid damper (MRF) has the advantages of simple structure, wide adjustable range, fast response speed, reversible reaction and low power consumption, so it has a good application prospect in the field of mechanical vibration control. In this paper, the following aspects are studied: (1) using the viscoplastic model of Bingham fluid, the influence of the design parameters of Mr fluid damper on the output damping force of the damper is theoretically studied. A model for calculating the damping force of the magnetorheological fluid damper is established. The relationship between the damping force and the applied magnetic field and shear gap is studied by using the numerical method. It provides a theoretical basis for the design of Mr fluid damper. (2) based on the theory of hydraulic fluid dynamics, a new type of Mr fluid damper and its sealing structure are designed, and the magnetic circuit and piston parameters of the damper are analyzed. The finite element analysis software is used to simulate the magnetic field inside the damper, and the relationship between the magnetic field and the external current in the magneto-rheological fluid damper is obtained. It provides a theoretical basis for the further study of the performance of Mr fluid damper. (3) the performance test platform of MRF damper is built by using screw drive system force sensor step motor and data acquisition system. The test platform is installed and debugged. (4) by changing the size of the damper piston, the effect of shear clearance on the output damping force of the MRF damper is studied experimentally. By changing the current intensity in the excitation coil of the damper, the effect of different external currents on the output damping force of the damper is studied. The results provide an experimental basis for the further application of the magnetorheological fluid damper.
【学位授予单位】：上海应用技术学院
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TB535

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