大型重载飞艇复合材料骨架结构设计及其力学分析
作者:
作者单位:

1.南京航空航天大学航空航天结构力学及控制全国重点实验室,南京210016;2.中国特种飞行器研究所,荆门448000

作者简介:

通讯作者:

许明轩,男,研究员,博士生导师,E-mail:xumx008@avic.com。

中图分类号:

V222

基金项目:


Design and Mechanical Analysis of Composite Framework Structure for Large Heavy Lift Airships
Author:
Affiliation:

1.State Key Laboratory of Mechanics and Control for Aerospace Structures, Nanjing University of Aeronautics & Astronautics, Nanjing 210016, China;2.China Special Vehicle Research Institute, Jingmen 448000, China

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    摘要:

    大型重载飞艇具有较为广阔的应用前景,但大尺寸、空间大跨度先进复合材料骨架结构设计与分析技术一直是制约大型重载飞艇发展的关键技术之一。以某型重载飞艇骨架为研究对象,以总体设计给出的相关要求作为设计输入条件,选择较成熟的材料体系和结构连接形式,完成了飞艇复合材料骨架结构设计。骨架的主要结构单元为三角桁架梁,开发了一种基于Python的飞艇骨架结构参数化建模方法。该方法基于刚度等效原理,将三角桁架转化成空间梁单元,可自动生成骨架整体有限元模型和定义连接关系,实现了飞艇骨架结构的参数化快速建模。针对飞艇悬停装卸载这一实际典型载荷工况,开展了骨架整体应力和变形计算,并运用“整体-局部”方法,将整体有限元分析中应力承载严重的等效梁单元还原成精细化三角桁架模型。基于Hashin失效准则,对复合材料圆管、接头等结构元件进行了强度计算和校核,结果验证了方法的有效性。

    Abstract:

    Large heavy lift airships have broad application prospects. However, design and analysis on advanced composite framework structures with large size and physical span have been one of the key technologies restricting the development of large heavy lift airships. This paper takes a certain heavy lift airship framework as the research object. We design an airship composite framework structure by considering the relevant requirements given by the overall design and selecting the more mature material system and structural connection form. The main structural element of the framework is a triangular truss beam, and a parametric modeling method based on Python is developed for the framework structure of the airship. Based on the principle of stiffness equivalence, the method transforms the triangular truss into a spatial beam element.It can automatically generate the overall finite element model of the framework and define the connection relationship. It realizes the parametric and rapid modeling of the framework structure. The overall stress and deformation calculation of the framework is carried out for the typical loading condition of hovering loading and unloading, and the “global-local” method is used to transform the equivalent beam element that has severe stress loads in the overall finite element analysis into a refined triangular truss model. Based on the Hashin failure criterion, the strength calculation and calibration are carried out for composite circular tubes, joints and other structural elements, and the results verifies the validity of the method.

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许明轩,徐雷,唐博建,孔卫宏,熊婕.大型重载飞艇复合材料骨架结构设计及其力学分析[J].南京航空航天大学学报,2024,56(5):932-938

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  • 收稿日期:2023-09-19
  • 最后修改日期:2024-05-20
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  • 在线发布日期: 2024-11-05
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