ANALYTICAL MODELING OF AN ELECTRORHEOLOGICAL SANDWICH BEAM
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摘要: 将电流变材料处理为粘弹性材料,采用了线性粘弹性理论,基于夹层梁动力学分析方法,利用广义Hamilton原理,推导了电流变层合梁的动力学方程。在此基础上,研究了具有简单的边界条件夹层梁的动力学特性,得出了在外加电场作用下,电流变层合梁模态频率和模态损耗因子都随着电场的增大而增大;电流变层合梁的低阶模态损耗因子变化趋势大于高阶模态损耗因子的变化趋势;在同样的电场(或电压)作用下,层合梁的低阶模态损耗因子大于高阶模态损耗因子。这些结论表明了电流变层合梁在外加电场作用下,对低频振动具有较好的振动抑振效果。Abstract: Based on the linear visco-elasticity theory, a variational mathematical model was developed using Hamilton's principle to describe the dynamics of ER sandwich beams. And a modal analysis of ER beam, considering simple boundary conditions, was performed. Some conclusions are drawn: the modal frequency and modal loss factor of the ER beam will become bigger when the applied electric field intensity is increased.
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Key words:
- electrorheological fluid /
- sandwich beam /
- modal frequency /
- modal loss factor
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