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Numerical static and dynamic analyses of improved equivalent models for corrugated sandwich structures

机译：瓦楞三明治结构改进等效模型的数值静态和动态分析

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In order to further improve the accuracy of the equivalent models of the trapezoidal corrugated core, a 3D homogenization method based on a representative unit cell (RUC) has been developed to obtain a complete set of equivalent properties, which also investigates the influences of the elastic modulus in the thickness direction and different RUCs on the equivalent models that were rarely considered in previous studies. Then free vibration analysis is conducted to further validate the present homogenized models by comparing with the corresponding actual corrugated sandwich structures. Finally, parametric studies are carried out to investigate the influence of the corrugation height and trough angle on the equivalent properties and natural frequencies. Results show that sufficient accuracy of the present homogenized models can be easily obtained by choosing suitable profile geometries and high-quality meshes. Furthermore, the effects of corrugation height and trough angle both play a vital role in the equivalent properties and dynamic behavior of corrugated sandwich structures. Several conclusions are drawn, which may be useful for designing such kinds of sandwich cored structures in the applications.
机译：为了进一步提高梯形波纹芯的等效模型的准确性，已经开发了基于代表单元电池（RUC）的3D均化方法以获得一整套等效性，这也研究了弹性的影响在先前研究中很少考虑的等效模型中的厚度方向和不同RUC的模量。然后进行自由振动分析以通过与相应的实际瓦楞三明治结构进行比较进一步验证本均质均质模型。最后，进行参数研究以研究波纹高度和槽角对等效性能和自然频率的影响。结果表明，通过选择合适的轮廓几何形状和高质量网格，可以容易地获得充分的均质模型的足够精度。此外，波纹高度和槽角度的效果在波纹夹心结构的等效性能和动态行为中起着至关重要的作用。绘制了几个结论，这对于设计应用中的这种种类的夹心芯结构可能是有用的。

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