摘要：磁流变减振器是一种以磁流变液作为其工作介质的新型阻尼可调器，因其具有功耗小、响应迅速、可控性强、阻尼力连续可调等优点，近年来在机械、汽车以及土木工程等领域的振动控制方面得到了广泛的应用。然而常规的磁流变减振器主要用于较低频率、长行程，但对于稍高频率振动的减振效率并不理想，这主要是因为环状缝隙较小，磁流变液从一腔流到另一腔需要较长的时间，所以不适于高频振动的控制，并且常规减振器的可控阻尼较小，为使磁流变减振器能够用于稍高频率的振动控制和获得较大的阻尼力，可以采取增加阻尼孔数目的办法。泡沫金属具有多孔且空隙能够达到很小的特点，若使磁流变液通过泡沫金属的孔隙，将会产生很大的阻尼力。另外，泡沫金属具有缓冲吸振的性能，将其与磁流变液减振器结合将产生附加的缓冲吸振效果。与传统磁流变减振器相比，该种减振器具有成本低和寿命长的特点。但是，通过理论计算发现该种减振器阻尼力较低。为了提高泡沫金属磁流变减振器的性能，本课题对其进行优化设计。20500
毕业论文关键词： 磁流变减振器；泡沫金属；磁流变液；ANSYS；磁场仿真；优化设计
Optimization design of metal foam magnetorheological absorber
Abstract: Magnetorheological(MR) absorber is a new adjustable MR damper with MR fluid serving as carrying liquid, and because of its low power consumption, fast response, controllable, continuously adjustable damping force and so on, in recent years, (MR) absorber vibration has been widely used in control machinery, automotive and civil engineering and other fields. However, the conventional magnetorheological absorber is mainly used for low frequency, long trip, but for a slightly higher frequency of vibration damping efficiency is not satisfactory, mainly because of the smaller annular gap, magneto-rheological fluid from one chamber flowing to the other chamber takes a long time, so it is not suitable for high-frequency vibration control, and controllable conventional shock absorber damping is smaller, magnetorheological absorbers able to make for a slightly higher frequency and vibration control the damping force is larger, the hole can be taken to increase the number of the damping solution. Metal foam has some characteristics that it is porous and its voids is small, when the magneto-rheological fluid flow through the pores of the metal foam, a large damping force will be generated. In addition, tMetal foam has performance of cushioning and vibration absorption, combined with its magnetorheological fluid absorber will produce additional shock absorbing cushioning effect. Compared with conventional magnetorheological absorber, the kind of absorber with characteristics of low cost and long life. However, by theoretical calculations found that the damping force of this kind of absorber is lower.In order to improve the the performance of metal foam magnetorheological absorber, I will research this study to optimize the design.
Keywords: Magnetorheological (MR) absorber; Metal foam; MR fluid; Ansys; Magnetic field simulation; Optimization design
目录
1 绪论 1
1.1 课题研究意义 1
1.2 本文的主要研究内容 2
2 泡沫金属磁流变减振器 3
2.1 磁流变液阻尼器的发展 3
2.1.1 国内发展 3
2.1.2 国外发展 4
2.1.3 磁流变减振器的应用 5
2.2 磁流变减振器的工作模式 5
2.3 泡沫金属磁流变减振器的提出 7
2.3.1 多孔泡沫金属 7
2.3.2 泡沫金属磁流变减振器的提出 8
2.4 泡沫金属磁流变减振器与传统磁流变液减振器对比 9 ANSYS泡沫金属磁流变减振器的优化设计+CAD图纸:http://www.youerw.com/jixie/lunwen_12444.html