长厚比对正六边形铝蜂窝夹层板等效板模型动力学计算精度的影响

发布时间：2018-05-18 02:31

  本文选题：长厚比 + 蜂窝夹层板　； 参考：《复合材料学报》2016年08期

【摘要】：为提高正六边形铝蜂窝夹层板的数值计算精度,研究了长厚比对其等效板模型动力学计算精度的影响。针对芯层均匀壁厚的正六边形铝蜂窝夹层板,首先研究了它的等效板模型,包括Reissner理论模型、蜂窝板理论模型和层合板低阶剪切理论模型;然后,将等效板模型与精细化模型相同模态振型的模态频率进行比较,分析了长厚比对等效板模型动力学计算精度的影响。结果表明:芯层均质化后模型模态频率的计算误差很小;层合板低阶剪切理论模型是计算精度较高的等效板模型;Reissner理论模型在长厚比为7.37时计算精度最低,蜂窝板理论模型对厚板的计算精度比薄板低,层合板低阶剪切理论模型对厚板的计算精度比薄板高。
[Abstract]:In order to improve the accuracy of numerical calculation of hexagonal aluminum honeycomb sandwich plates, the effect of the ratio of length to thickness on the dynamic calculation accuracy of the equivalent plate model is studied. For hexagonal aluminum honeycomb sandwich plate with uniform wall thickness of core layer, the equivalent plate model, including Reissner theory model, honeycomb plate theory model and low order shear theory model of laminated plate, is studied firstly. The effect of the ratio of length to thickness on the dynamic calculation accuracy of the equivalent plate model is analyzed by comparing the modal frequencies of the equivalent plate model with that of the refined model. The results show that the calculation error of the modal frequency of the model is very small after homogenization of the core layer, the low order shear theory model of laminated plate is the equivalent plate model with high accuracy, and the Reissner model has the lowest accuracy when the ratio of length to thickness is 7.37. The calculation accuracy of honeycomb plate model is lower than that of thin plate, and that of laminated plate model is higher than that of thin plate.
【作者单位】： 北京理工大学宇航学院;
【基金】：国家自然科学基金(11002027,11290151)
【分类号】：V414.6
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本文编号：1903999