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Analysis of active damping in composite laminate cyindrica shes of revolution with skewed PVDF sensors/actuators

机译:偏心PVDF传感器/执行器对复合材料叠层圆柱旋转中的主动阻尼的分析

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摘要

Active damping in a FRP composite cylindrical shell with collocated piezoelectric sensors/actuators is studied. The electrode on the sensors/actuators are spatially shaped to reduce spillover between circumferential modes. A three nodded, isoparametric, semianalytical finite element is developed and used to model the cylindrical shell. The element is based on a mixed piezoelectric shell theory which makes a single layer assumption for the displacements and a layerwise assumption for the electric potential. The effects of location of patch of collocated piezoelectric sensors/actuators, percentage length of the shell covered with these patches, fiber angle of the laminae in the composite laminate, staking sequence of laminae in a laminate and skew angle of the sensor/actuator piezoelectric material, on the system damping for various modes is studied.
机译:研究了并置压电传感器/执行器的FRP复合材料圆柱壳中的主动阻尼。传感器/执行器上的电极在空间上具有一定的形状,以减少圆周模式之间的溢出。开发了一个三点等参半解析有限元,并将其用于圆柱壳建模。该元件基于混合压电壳理论,该理论对位移进行单层假设,对电势进行分层假设。并置压电传感器/执行器的贴片位置,覆盖这些贴片的壳体的百分比长度,复合层合物中薄片的纤维角度,层合物在薄片中的铆接顺序以及传感器/执行器压电材料的偏斜角的影响,研究了系统在各种模式下的阻尼。

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