邹广平， 刘宝君^*， 芦颉， 曹扬

（  哈尔滨工程大学航天与建筑工程学院；  ）

摘要： 本文阐述了蜂窝夹芯结构的基本等效方法以及计算模型，从理论上分析了金属蜂窝夹芯结构在三点弯曲下的力学性能，推导出蜂窝芯子的等效剪切模量，分析了芯子剪切应力状态。其次，应用有限元软件对金属蜂窝夹芯板的三点弯曲试验进行了数值仿真模拟，对比了蜂窝芯子的两个排列方向对结构强度的影响，考虑了网格划分对数值模拟计算结果的影响，并对金属蜂窝夹芯板进行了等效模拟，分析了金属蜂窝夹芯板与等效板之间的应力状态的差别。然后，通过两端固支的金属蜂窝夹芯板热载荷下膨胀的数值模拟，以及高温下金属蜂窝夹芯板的三点弯曲试验的数值模拟，分析了高温-恒温环境下，热应力、弹性常数对金属蜂窝夹芯结构的力学性能所产生的影响，并对常温和高温下的数值模拟结果进行了比较分析；最后对金属蜂窝夹芯结构进行了优化设计分析，在满足强度、 的前提下，以蜂窝夹芯结构的面板厚度与芯子壁的厚度为设计变量，蜂窝夹芯板整体重量为目标函数，得到其重量最优解。
关键词： 蜂窝夹芯结构；高温；数值模拟；三点弯曲；优化设计

Zou Guangping， Liu Baojun^*， Lu Jie， Cao Yang

（  College of Aerospace & Civil Engineering,Harbin Engineering University；  ）

Abstract： In this work, through the three-point bending, the mechanical properties of metal honeycomb sandwich structure were analyzed theoretically under room and high temperature environment. The numerical simulations of this structure were carried with the finite element software. The simulation results were well agreed with the experiment results. The results show that the honeycomb sandwich structure which brazed by carbon steel under the three-bending experiments, the L direction specimen were 10% stronger than W direction specimen. The shear strength of honeycomb core was enhanced, but still satisfied the shear strength requirements. Then based on the method of equal rigidity, with the same length, width, and different equal height, the sandwich structure was equaled to a solid panel, and the honeycomb sandwich structure was lighter than the equivalent panel. Finally the optimization design of the metal honeycomb sandwich structure was accomplished by finite element analysis, under the premise of the strength and stiffness satisfied, the optimal solution of the weight was obtained. The minimum weight's geometry of the metal honeycomb sandwich structure was gained.

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