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首页> 外文期刊>Journal of the Aeronautical Society of India >VIBRATION CONTROL OF COMPOSITE THICK SHELLS USING MAGNETOSTRICTIVE MATERIAL AND HIGHER ORDER SHEAR DEFORMATION THEORY
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VIBRATION CONTROL OF COMPOSITE THICK SHELLS USING MAGNETOSTRICTIVE MATERIAL AND HIGHER ORDER SHEAR DEFORMATION THEORY

机译：磁致伸缩材料和高阶剪切变形理论控制复合厚壳的振动

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摘要

Analytical solutions of laminated composite shells with embedded actuating layers are presented in this study. The actuating layers are used to control natural vibration of laminated composite shell panels. The first order shear deformation theory (FSDT) and higher order shear deformation theory (HSDT) for shells are used to represent the shell kinematics and equations of motion. The exact solution for symmetric laminated shells with embedded actuating layers under simply supported boundary conditions is obtained using the Navier solution procedure. Negative velocity feedback control is used. The parametric effect of the position of the magnetostrictive layers, material properties and control parameters on the vibration suppression are investigated in detail. It is found that (i) the shortest vibration suppression time is achieved by placing the actuating layers farthest from the neutral axis (ii) using thinner smart material layers leads to better vibration attenuation characteristics and, (iii) the vibration suppression time is longer for a lower value of the feedback control coefficient. For thicker shells HSDT predicts larger amplitude of vibration and longer vibration suppression time as compared to FSDT predictions.
机译：这项研究提出了具有嵌入式驱动层的层压复合材料壳的解析解。致动层用于控制层压复合壳面板的自然振动。壳体的一阶剪切变形理论（FSDT）和高阶剪切变形理论（HSDT）用于表示壳体的运动学和运动方程。使用Navier解法可得到在简单支撑的边界条件下具有嵌入的致动层的对称层压壳的精确解。使用负速度反馈控制。详细研究了磁致伸缩层位置，材料特性和控制参数对减振的参数影响。发现（i）最短的振动抑制时间是通过将致动层放置在离中性轴最远的位置来实现的（ii）使用较薄的智能材料层可获得更好的振动衰减特性，并且（iii）振动抑制时间更长。反馈控制系数的较低值。与FSDT预测相比，对于更厚的壳体，HSDT预测的振动幅度更大，振动抑制时间更长。

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