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Vibration and damping analysis of a three-layered composite annular plate with a viscoelastic mid-layer

机译:具有粘弹性中层的三层复合环形板的振动与阻尼分析

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摘要

The natural frequencies and modal loss factors of the three-layered annular plate with a viscoelastic core layer and two polar orthotropic laminated face layers are considered. The discrete layer annular finite element is employed to derive the equations of motion for the three-layered annular plate. The viscoelastic material in the central layer is assumed to be incompressible, and the extensional and shear moduli are described by the complex quantities. Complex eigenvalued problems are then solved, and the frequencies and modal loss factors of the composite plate are extracted. The results of the symmetric and non-symmetric composite annular plates are both presented. The effects of material properties, radius to thickness ratio, stacking sequences and thickness of face layers, and thickness of the viscoelastic core layer are discussed.
机译:考虑具有粘弹性芯层和两层正交各向异性正交面层的三层环形板的固有频率和模态损耗因子。离散层环形有限元用于导出三层环形板的运动方程。假定中心层中的粘弹性材料是不可压缩的,并且拉伸模量和剪切模量由复数来描述。然后解决复杂的特征值问题,并提取复合板的频率和模态损耗因子。给出了对称和非对称复合环形板的结果。讨论了材料特性,半径与厚度之比,堆积顺序和表层厚度以及粘弹性芯层厚度的影响。

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