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Free vibration analysis of coplanar sandwich panels

机译:共面夹芯板的自由振动分析

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A comprehensive vibration study of simple three-layer sandwich plates, based on the h-p version of the finite element method, is presented. The methodology incorporates a new set of trigonometric functions to provide the element p-enrichment -- these functions exhibit good convergence characteristics, and enable the medium frequency regime to be explored at minimum computational expense. Elements may be joined together to model more general coplanar assemblies, and the trade-off between h- division and p-enrichment is discussed. Excellent agreement has been found with the work of other investigators, and new results are presented for (i) a completely free, symmetric section, rectangular sandwich panel whose core thickness is varied as a function of the overall plate thickness whilst the mass per unit area is maintained constant, and (ii) a cantilevered, T- planform, asymmetric section, sandwich plate.
机译:基于有限元方法的h-p版本,对简单的三层夹心板进行了全面的振动研究。该方法学结合了一组新的三角函数,以提供元素p富集-这些函数表现出良好的收敛特性,并使得能够以最小的计算成本来探索中频状态。可以将元素连接在一起以建模更通用的共面装配,并讨论h划分与p富集之间的权衡。已经与其他研究人员的工作达成了极好的协议,并且针对以下方面提出了新的结果:(i)完全自由,对称截面的矩形夹心板,其芯厚度随总板厚度而变化,而单位面积质量保持恒定;(ii)悬臂,T形,不对称截面的夹心板。

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