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首页> 外文会议>Conference on damping and isolation >Magnetorheological Elastomers in Tunable Vibration Absorbers
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Magnetorheological Elastomers in Tunable Vibration Absorbers

机译：可调振动吸收器中的磁流变弹性体

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Filling an elastomeric material with magnetizable particles leads to mechanical properties -shear moduli, tensile moduli, and magnetostriction coefficients - that are reversibly and rapidly controllable by an applied magnetic field. The origin of the field dependence of these properties is the existence of field-induced dipole magnetic forces between the particles. These 'smart' composites, which are sometimes termed magnetorheological (MR) elastomers, have been explored for use in a number of components, including automotive suspension bushings. In these and other applications, the tunability of the stiffness can enhance the compliance-control or vibration-transfer performance of the complex mechanical systems in which they are used. In the present study, we have constructed a simple one-degree-of-freedom mass-spring system - an adaptive tuned vibration absorber - that utilizes MR elastomers as variable-spring-rate elements. This device was used not only to explore the performance of such tunable components, but also to extend measurements of the shear moduli of these materials to higher frequencies than has previously been reported. We find that the field-induced increase in moduli of these materials is effective to mechanical frequencies well above 1 kHz, and that the moduli are consistent with the behavior expected for filled elastomers.
机译：填充的弹性体材料与可磁化粒子导致机械性能-shear模量，拉伸模量，和磁致伸缩系数 - 这是可逆地和通过迅速可控施加的磁场。这些属性的场依赖性的起源是在颗粒之间字段 - 诱导偶极磁力的存在。这些“智能”的复合材料，其是有时被称为磁流变（MR）弹性体，已探索用于在多个组件，其中包括汽车悬挂衬套使用。在这些和其他应用中，刚性的可调谐性可以增强它们所使用的复杂的机械系统的顺应性控制或振动传输性能。在本研究中，我们已经建立了一个简单的一程度的自由度质量 - 弹簧系统 - 自适应调谐减振器 - 利用MR弹性体作为可变弹簧率的元件。已使用此装置不仅探讨这样的可调谐元件的性能，而且也比以前已报道这些材料的剪切模量的测量结果扩展到更高的频率。我们发现，在这些材料的弹性模量的场致增长是有效的机械频率远高于1千赫兹，并且该模量预计为填充弹性体的行为是一致的。

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