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基于拓扑优化的新型蜂窝结构设计
Design of New Honeycomb Structure Based on Topology Optimization
投稿时间:2022-02-28  修订日期:2022-04-09
DOI:
中文关键词:  零泊松比蜂窝  拓扑优化  大变形  驱动力小  高承载
英文关键词:zero possion’s ration honeycomb  topology optimization  large deformation  low driving force  high load-bearing capacity
基金项目:国家自然科学基金(U1808215,12172076)资助项目.
作者单位邮编
刘浩 大连理工大学 工业装备结构分析国家重点实验室 116024
高仁璟 大连理工大学 工业装备结构分析国家重点实验室 116024
肖山 沈阳飞机设计研究所
沈阳飞机设计研究所 
王长生 大连理工大学 工业装备结构分析国家重点实验室 
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中文摘要:
      可变体飞行器若要实现机翼后掠角、面积和前后缘弯度等参数的大幅度变化,机翼蒙皮需要具有光滑的气动外形,大变形、高承载以及驱动力小的特点。针对柔性蒙皮的需求,本文利用拓扑优化方法设计了一种新型零泊松比蜂窝结构,通过有限元仿真与U形蜂窝结构和余弦形蜂窝结构进行对比,验证其变形、承载等性能。以最大应变2%为基准,比较了三种蜂窝结构的变形能力。结果表明新型蜂窝结构的拉伸变形量高达75%,分别是U形蜂窝结构、余弦形蜂窝结构的1.7倍、2.1倍。在最大位移量相同时,所需驱动力分别是U形蜂窝结构、余弦形蜂窝结构的0.51倍、0.28倍,表明新型蜂窝结构具有很大的易变形能力。当蜂窝结构的橡胶蒙皮受到相同压强载荷且处于初始未拉伸状态/拉伸状态时,新型蜂窝结构橡胶蒙皮的最大法向位移量分别是U形蜂窝橡胶蒙皮、余弦形蜂窝橡胶蒙皮的0.4倍/0.56倍、0.29倍/0.42倍,表明新型蜂窝结构具有良好的面外承载能力。另外,通过适当增加壁厚,可以提高新型蜂窝结构本身的抗弯曲能力。分析结果表明,本文所设计的新型蜂窝结构具备大变形、高承载以及驱动力小的优点。
英文摘要:
      For deformable aircraft to achieve large changes in wing sweep angle, area, and leading and trailing edge curvature, the wing skin should have smooth aerodynamic shape, large deformation, high load-bearing capacity and small driving force. Aiming at the demand of flexible skin, a new zero possion’s ratio honeycomb structure is designed by topology optimization method, and the performance of the structure is verified by finite element analysis compared with U-type honeycomb structure and cosine honeycomb structure. The deformation capacity of three structures is compared with the maximum strain of 2%. The tensile deformation of the new honeycomb structure is up to 75%, which is 1.7 times that of U-type honeycomb structure and 2.1 times that of cosine honeycomb structure. The new honeycomb structure has strong deformability. When the maximum displacement is the same, the required driving force is 0.51 times and 0.28 times of the U-shaped honeycomb structure and the cosine-shaped honeycomb structure respectively. The new honeycomb structure has high load-bearing capacity. When the rubber skin of the honeycomb structure is under the same pressure load and in the initial unstretched state or stretched state, the maximum normal displacement of the new honeycomb structure skin is small, which is 0.4 times or 0.56 times that of U-type honeycomb structure skin, 0.29 times or 0.42 times that of cosine honeycomb structure skin. In addition, by appropriately increasing the wall thickness, the bending resistance of the new honeycomb structure can be significantly improved. Analysis results show that the new honeycomb structure designed in this paper has the advantages of large deformation, high load-bearing capacity and low driving force.
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