分散粒子のクラスタ形成を考慮したMR流体の透磁率の算定(機械力学,計測,自動制御)

概要

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Magnetorheological (MR) fluid can vary the rheological characteristics according to applied magnetic field strength and has been applied to various kinds of devices such as dampers, clutches, etc. In the design of these devices, magnetic analysis is generally carried out to verify their performance. Though the permeability of MR fluid should be estimated beforehand in the analysis, it cannot be given uniquely because MR fluid is a particle-dispersed system and the particles form clusters under a magnetic field. In this study, the cluster formation of the particles was modeled and simulated by Cellular Automata. Cellular Automata is known as a class of discrete modeling techniques in which the whole phenomena of the system emerge through the local interaction among state variables defined on each cell. On the basis of the simulation results, magnetic analysis was carried out to obtain the equivalent permeability of MR fluid considering the cluster formation. It was shown that the permeability might be estimated from the iron content in MR fluid.
一般社団法人日本機械学会の論文
2003-04-25