磁流变阻尼器的结构和性能研究

【作者】 李占卫；

【导师】 郑建国；

【作者基本信息】 南京理工大学 ， 机械设计及理论， 2012， 硕士

【摘要】 磁流变阻尼器是一种新型的智能化机械动作器,在许多领域都有良好的应用前景。因此,研制出性能优良的磁流变阻尼器具有很重要的意义。本文以此为目的,期望可以通过改变阻尼器的结构达到提高其性能的目的,对此进行了相关的研究。具体工作如下：1、基于Bingham模型,应用流体力学理论,建立了描述剪切阀式磁流变阻尼器性能的数学表达式,分析了磁流变阻尼器的各个结构参数对磁流变阻尼器性能的影响情况。2、对间隙结构进行精细化设计。设计出了一种新型的带凸台的间隙结构。然后应用有限元分析方法,对设计出来的带有新型间隙结构的阻尼器进行磁场分析和流场分析,分析其性能。通过与原阻尼器进行对比,发现所设计出的带凸台的间隙结构可以显著提高阻尼器的性能。3、应用有限元分析方法,在一定活塞速度和电流的情况下,分别研究了凸台间隙结构的三个参数对磁流变阻尼器性能的影响,通过分析比对,找出了三个参数的最优组合。本章所得出的结论有很好的实用性。4、对传统的用于流场分析的Bingham模型进行一定的改进,考虑了间隙结构中磁场、流场的各向异性,在双向应力作用下对磁流变阻尼器进行有限元分析,探讨和建立了一种相对简单实用又具有足够精度的计算模型和方法,同时简单介绍了如何在ANSYS平台上实现该模型。更多还原

【Abstract】 MRF damper is a new type of intelligential mechanical action controller, which has a good application prospect in many fields. It has very important significance to develop good performance of MRF damper. For this purpose, some relevant researches are made to change the structure of the damper to improve the performance. Concrete content as follows:1. Based on Bingham model and the theory of fluid mechanics, a mathematical expression is set up to describe the performance of the shear valve type MRF damper. This paper analyzes each structure parameters of the MRF damper how to influence its performance.2、Concentrated on the elaborate designing, a new type of Clearance structure equipping boss is designed The finite element analysis method is applied to analyze magnetic field and flow field of the MRF damper with a new type of structure. Compared the performance to the original damper, the designed clearance structure equipping boss can improve the performance of the damper.3、Under a certain piston speed and electricity current situation, finite element analysis method is used to study the three parameters of clearance structure equipping boss how to influence the performance of MRF damper. Through the comparative analysis, the most optimal combination of the three parameters is found out. This conclusion this chapter provided in the structure of MRF damper designs has a commendable practical applicability.4、Considering the anisotropism of magnetic field and the flow field in interstitial structure, the traditional Bingham model using in the flow field analysis has been improved. Through the method of finite-element analysis, the structure of the MRF damper is analyzed under the function of two dimensional stresses. This paper probes and sets up a relatively simple and precise calculation model and method that can be implemented in ANSYS platform.更多还原