复合材料科学与工程 ›› 2021, Vol. 0 ›› Issue (7): 68-75.DOI: 10.19936/j.cnki.2096-8000.20210728.011

• 应用研究 • 上一篇    下一篇

复合材料滑橇式起落架落震性能分析

吴玉根1, 毛春见1*, 周忠斌2, 钟茂平3   

  1. 1.南京航天航空大学 机械结构力学及控制国家重点实验室,南京210016;
    2.中国商用飞机有限责任公司 上海飞机设计研究院,上海201210;
    3.江西洪都航空工业集团有限责任公司,南昌330024
  • 收稿日期:2020-12-16 出版日期:2021-07-28 发布日期:2021-08-04
  • 通讯作者: 毛春见(1983-),男,博士,讲师,主要从事复合材料结构损伤容限/耐久性等领域科研工作,nuaamaoteam@163.com。
  • 作者简介:吴玉根(1996-),男,硕士研究生,主要研究方向为复合材料数值分析。
  • 基金资助:
    江苏省自然科学基金资助项目(BK20160786);江苏省优势学科建设工程资助项目(PAPD)

Analysis of falling performance of composite skid landing gear

WU Yu-gen1, MAO Chun-jian1*, ZHOU Zhong-bin2, ZHONG Mao-ping3   

  1. 1. State Key Laboratory of Mechanics and Control for Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;
    2. Shanghai Aircraft Design and Research Institute, Commercial Aircraft Corporation of China, Ltd., Shanghai 201210, China;
    3. Jiangxi Hongdu Aviation Industry Co., Ltd., Nanchang 330024, China
  • Received:2020-12-16 Online:2021-07-28 Published:2021-08-04

摘要: 针对复合材料滑橇式起落架,设计落震平台试验系统,并进行落震试验。基于ABAQUS/Explict分析模块,二次开发定义材料用户子程序VUMAT,引入损伤判据以及材料刚度折减方案,建立复合材料滑橇式起落架的渐进损伤分析方法,数值结果与试验结果吻合较好,验证了模型的有效性。结果表明:复合材料滑橇式起落架在落震过程中,机身与滑橇连接处和复合材料铺层变厚度区域应力应变偏高。在工况二下,复合材料滑橇式起落架在着陆之后,抱箍连接处会产生一定的基体损伤。

关键词: 复合材料, 滑橇式起落架, 落震试验, 显式动力学, 渐进损伤

Abstract: Composite materials have good mechanical properties and have been widely used in aviation field. Compared with the traditional metal landing gear, the composite skid landing gear has the advantages of light weight, corrosion resistance and designability. In order to ensure the safety of composite landing gear in use, it is necessary to study the mechanical properties of composite landing gear. For composite skid landing gear, a falling platform test system is designed and tested. Based on ABAQUS/Explict analysis module, the material user subroutine VUMAT is redeveloped and defined, damage criterion and material stiffness reduction scheme are introduced, and a progressive damage analysis method for composite skid landing gear is established. The numerical results agree well with the test results, which verifies the validity of the model. The results show that the stress and strain of the fuselage-skid connection and the variable thickness area of the composite layers are higher during the falling of the composite skid landing gear. In condition Ⅱ, composite skid landing gear may cause certain matrix damage at the clamp connection after landing.

Key words: composite material, skid landing gear, drop test, explicit dynamics, progressive damage

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