有抑制使用橡胶磁性的粉末(DRM ) 的材料的一根伸臂横梁被调查了。二个方法被选择保持 DRM 到一根颤动的钢横梁,一个人是由粘合剂结合由磁性的吸引人的力量(叫的 DRM 横梁) 和其它依附 DRM (叫的 AB-DRM 横梁) 。与引起由的 AB-DRM 横梁的抑制性质不同砍抑制材料的变丑, DRM 横梁的抑制性质被滑动描绘和抑制材料的内部损失的摩擦损失。作者建立了明确的表达预言 DRM 横梁的抑制特征,它试验性地被验证。橡胶材料损失因素尾在抑制 DRM 横梁对 AB-DRM 横梁的改进上有明确的影响,这被发现。如果尾是比在 0.8255 附近的批评价值小的,振动振幅的一个有效范围总是在在哪个 DRM,横梁能完成比 AB-DRM 横梁的更好的抑制存在;相反地,如果尾比批评价值大,当幻灯片发生时,有效范围不存在。如此的结果被用来决定 DRM 的优点和限制并且开发设计指南。
A cantilever beam with Damping Material Applying Rubber Magnetic Powder (DRM) has been investigated. Two methods are selected to hold DRM to a vibrating steel beam, one is to attach DRM by the magnetic attractive force (called DRM beam) and the other by adhesive bonding (called AB-DRM beam). Different from the damping property of AB-DRM beam caused by shear deformation of damping material, the damping property of DRM beam is characterized by the sliding frictional loss together with the internal loss of damping material. The authors established a formulation to predict the damping characteristics of DRM beam, which was validated experimentally. It is found that rubber material loss factor β has a decisive influence on damping improvement of DRM beam versus AB-DRM beam. If β is smaller than the critical value around 0.8255, a valid range of vibratory amplitude always exists in which DRM beam can achieve better damping than AB-DRM beam; conversely, if β is bigger than the critical value, the valid range does not exist when slide occurs. Such results are used to determine the merits and limitations of DRM and develop design guidelines.