Vibration Response Characteristics of Quasi-Periodic Sandwich Beam With Magnetorheological Visco-Elastomer Core Under Random Support Excitations
Vibration Response Characteristics of Quasi-Periodic Sandwich Beam With Magnetorheological Visco-Elastomer Core Under Random Support Excitations
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DOI：
10.1115/1.4039726
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发表时间：
2018-10
期刊：
影响因子：
--
通讯作者：
Z. Ying;Y. Ni;R. Huan
中科院分区：
文献类型：
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作者：
Z. Ying;Y. Ni;R. Huan
可以使用具有可调节动态特性的磁流变粘弹性体芯来对受到随机支撑运动激励的具有支撑质量的夹层梁进行振动控制。夹层梁几何和物理参数的周期性分布可以改善其振动响应特性。为了进一步改善特性或减少响应，研究了随机激励下带有支撑质量的准周期夹层梁。夹层梁的面层厚度和芯层模量被认为是准周期分布。推导了夹层梁水平和垂直耦合运动的偏微分方程，并将其转换为多自由度（DOF）振动的常微分方程。得到了夹层梁的频率响应和响应谱密度表达式。数值结果说明了夹层梁振动响应特性的显着改善以及反共振响应相对减少局部化的突出表现。所提出的准周期分布和分析方法可用于随机激励下夹层梁的振动控制设计。
The vibration control of a sandwich beam with supported mass subjected to random support motion excitations can be performed using magnetorheological visco-elastomer core with adjustable dynamic properties. The periodic distributions of geometrical and physical parameters of the sandwich beam can improve its vibration response characteristics. To further improve characteristics or reduce responses, the quasi-periodic sandwich beam with supported mass under random excitations is studied. The facial layer thickness and core layer modulus of the sandwich beam are considered as quasi-periodic distributions. The partial differential equations for the horizontal and vertical coupling motions of the sandwich beam are derived and converted into ordinary differential equations for multi-degrees-of-freedom (DOFs) vibration. The expressions of frequency response and response spectral densities of the sandwich beam are obtained. Numerical results are given to illustrate the greatly improvable vibration response characteristics of the sandwich beam and the outstanding relative reduction localization of antiresonant responses. The proposed quasi-periodic distribution and analysis method can be used for the vibration control design of sandwich beams subjected to random excitations.