宽度方向附加局部磁约束阻尼条的夹心板的振动特性

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在柔性结构的减振处理中,传统被动无磁约束减振(PCLD)方法已被广泛采用,但是由于阻尼材料特性受温度和频率的影响,其减振效果受到限制。而采用在约束层上设置永磁体的方法(MCLD)可使阻尼层达到比传统约束阻尼处理方法更高的剪应变,从而增强粘弹层的阻尼耗能,提高低阶模态的减振效果。针对悬臂板的(m=1,n=1)、(m=2,n=1)的两阶扭转模态,在这两阶的方向上的节线y=B/2处设置永磁体,节线两侧设置磁约束阻尼层,研究MCLD的阻尼改进效果及规律。研究表明,在悬臂板的自由端铺设磁阻尼层时,能有效地提高阻尼减
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