仿生纤维增强复合材料层压板的自由振动

FREE VIBRATION OF BIOMIMETIC FIBER REINFORCED COMPOSITE LAMINATES

  • 摘要: 基于Hamilton原理和一阶剪切变形板理论,获得了Winkler-Pasternak弹性基础上仿生纤维增强复合材料层压板的自由振动控制方程。在四边固支和四边简支的边界条件下,利用微分求积法研究了仿生纤维增强复合材料层压板的无量纲固有频率,讨论了叠层结构、边界条件、宽厚比、无量纲弹性基础刚度以及轴向载荷比对仿生纤维增强复合材料层压板无量纲固有频率的影响。结果表明,固有频率随Winkler弹性基础刚度、Pasternak弹性基础刚度、板宽厚比的增大而增大,随轴向载荷比的增大而减小。

     

    Abstract: Based on Hamilton's principle and the first-order shear deformation plate theory, the free vibration control equation of biomimetic fiber reinforced composite laminates on Winkler Pasternak elastic foundation was proposed. The dimensionless natural frequencies of biomimetic fiber reinforced composite laminates were discussed using the differential quadrature method under the boundary conditions of four fixed and four simply supported edges. The effects of laminated structure, boundary conditions, aspect ratio, dimensionless elastic foundation stiffness, and axial load ratio on the dimensionless natural frequency of biomimetic fiber reinforced composite laminates were examined through numerical examples. The results show that the natural frequency increases with the increase of the Winkler elastic foundation stiffness, the Pasternak elastic foundation stiffness, and the plate width thickness ratio, while decreases with the increase of the axial load ratio.

     

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