This paper deals with the dynamic characteristics of hemispherical sandwich shells with electro-rheological (ER) fluid core under clamped free and clamped clamped conditions. The free vibration and damping analysis is carried out by using the semi-analytical finite element method. Three noded line elements with seven degree of freedom per node are used in meridional direction and Fourier series is assumed in circumferential direction. There are two types of electro-rheological fluid cores used in the present study. The damping variation of hemispherical sandwich shell for different radius to thickness (R/t) ratio and core to facing thickness ratio (t{sub}c/t{sub}f) are carried out. The variation of damping properties of ER fluid with electric field is also investigated.
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机译：本文涉及在夹紧和夹紧夹紧条件下具有电流流变（ER）流体芯的半球夹心壳的动态特性。通过使用半分析有限元方法进行自由振动和阻尼分析。每个节点具有七个自由度的三个点头线元素用于优选方向，傅里叶系列以圆周方向假设。本研究中使用两种类型的电流流变芯。执行针对厚度（R / T）比和面对厚度比（T {Sub} C / T {Sub} F）的不同半径的半球夹心壳的阻尼变化。还研究了与电场的ER流体阻尼性能的变化。
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