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Natural frequency analysis of a sandwich panel with soft core based on a refined shear deformation model

机译：基于精细剪切变形模型的软芯夹芯板固有频率分析

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摘要

The natural frequency of a thick rectangular sandwich panel composed of orthotropic facesheets and a soft core was studied based on a refined shear deformation model. The shear deformation of the sandwich panel was described by a polynomial function. The effect of transverse shear modulus of the facesheets and core on flexural vibration of the panel was investigated. Comparison was made among classical thin plate theory, linear shear (low order) deformation theory and the refined shear (high order) deformation model. Results from finite element analysis were also provided to verify the theoretical predictions. It was shown that the refined shear deformation model provided a better prediction on the natural frequency of vibration of a sandwich panel than thin plate model or low order deformation model.
机译：基于精细的剪切变形模型，研究了由正交各向异性面板和软芯组成的矩形厚夹心板的固有频率。夹层板的剪切变形由多项式函数描述。研究了面板和芯的横向剪切模量对面板弯曲振动的影响。比较了经典薄板理论，线性剪切（低阶）变形理论和精细剪切（高阶）变形模型。还提供了有限元分析的结果，以验证理论预测。结果表明，与薄板模型或低阶变形模型相比，改进的剪切变形模型可以更好地预测夹层板的固有振动频率。

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