(3)机身整体壁板
建议以焊接整体带筋壁板为研究重点 ,尽快开展如下工作 :①针对典型结构的焊接 (激光和搅拌摩擦焊)和成形工艺 (喷丸成形和时效成形)基础试验 ;②焊接和成形后材料力学性能分析评估 ;
③材料微观组织结构变化规律研究 ;④针对激光焊接和搅拌摩擦焊接的工艺验证试验 ;⑤针对焊
核心关键制造
,应尽快立项开展针对大飞机机翼和机身的整体壁板长寿命、低成本成形技术的系统研究 ,才能有效地解决这一长期制约中国飞机研制的重大瓶颈问题 ,确保大飞机的研制成功。
参 考 文 献
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—飞机钣金工艺[M].北京 :航空工业出版社 , 1992 : 3972400. Aeronautical Manufacturing Technology Manual Ehief Ed2 itorial Committee. Aeronautical manufacturing technology manual —sheet metal forming[M]. Beijing: Aviation In2 dustry Press,1992: 3972400. (in Chinese)
[2] 常荣福.飞机钣金零件制造技术[ M ].北京 :国防工业出版社 , 1992 :942117. Chang Rongfu. Sheet metal forming technology[M].Bei2 jing: National Defence Industry Press, 1992:942117. (in Chinese)
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[4] 曾元松 ,黄遐 ,李志强.先进喷丸成形技术及其应用与发展
[J ].塑性工程学报 ,2006 , 13 (3) :23228.
Zeng Yuansong , Huang Xia , Li Zhiqiang. The application
and development of advanced shot peen forming technolo2
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23228. (in Chinese)
[5] O’Hara P. Peen2forming —a developmenting technique
[C] ∥Proceedings of the 8th International Conference on Shot Peening (ICSP8).2002:2152226.
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[ 15 ] 李劲风 ,郑子樵 ,李世晨 ,等.铝合金时效成形及时效成形铝合金[J ].材料导报 , 2006 ,20 (5) :1012103. Li Jinfeng , Zheng Ziqiao ,Li Shichen , et al. Age forming of Al alloys and ageformable Al alloys[J]. Journal of Ma2 terials , 2006 ,20 (5) :1012103. (in Chinese)
[ 16 ] 周贤宾 ,常和生 ,陈爱雅 ,等.带筋壁板的时效应力松弛校形[J ].航空制造工程与维修 , 1998 (5) :19223. Zhou Xianbing, Chang Hesheng, Chen Aiya. Stress2re2 laxtion sizing integral panel[J ]. Aviation Engineering and Maintenance ,1998 (5) :19223. (in Chinese)
作者简介 :曾元松 (1971 -) 男 ,博士 ,研究员。主要研究方向 :整体壁板成形与强化技术、管件成形技术和钣金零件数字化制造技术等。
Tel : 010285701351 E2mail: yszengnantes@yahoo.com
黄遐(1977 -) 女 ,硕士 ,工程师。主要研究方向 :整体壁板成形技术。
Tel : 010285701254 E2mail : huangxia @bamtri. com. cn
(责任编辑 :蔡斐 ,杨冬)
文章编号 :100026893 (2008) 0320627207
带油箱结构的机身框段坠撞仿真分析
何欢 ,陈国平 ,张家滨 (南京航空航天大学振动工程研究所 ,江苏南京 210016)
Crash Simulation of Fuselage Section with Fuel Tank
He Huan , Chen Guoping , Zhang Jiabin
(Institute of Vibration Engineering Research , Nanjing University of Aeronautics and Astronautics ,
Nanjing 210016 , China)
摘 要 :主要研究了任意拉格朗日 /欧拉耦合方法计算带油箱的机身框段的坠撞过程。首先 ,建立了带油箱结构的机身框段坠撞分析模型 ,包括机身框段结构模型和欧拉流体模型。采用水代替油箱内部燃油 ,考虑了
装水量和机身框段最大垂向压缩位移、最大过载和能量吸收等参数之间的关系。通过仿真分析 ,揭示了冲击载荷作用下油箱内部燃油量对机身框段各个部分结构的损伤破坏的影响。研究指出 ,在垂直撞击环境下 ,机身加强框和蒙皮是主要的吸能结构。在油箱内装水量多的情况下 ,油箱结构的吸能作用不能忽略。给出了应急着陆或可生存坠撞事故发生前 ,飞行员所应采取的紧急措施。关键词 :任意拉格朗日 /欧拉耦合 ;耐撞性 ;油箱结构 ;机身框段中图分类号 : V221 文献标识码 :A Abstract : A numerical model for the crash simulation of a fuselage section with a fuel tank is developed in this paper. The fluid2structure interaction is considered in the impact simulation using the arbitrary Lagrangian/ Eulerian coupling method. The whole model consists of a finite element model of the fuselage section with a fu2 el tank and an Eulerian model of the water inside the fuel tank , which is used instead of fuel. Crashworthiness of the fuselage section under the influence of the water volume inside the fuel tank is taken into account. How the water sloshing inside the fuel tank influences the deformation of the fuselage section is analyzed. The rela2 tionship is established between the water volume and the maximal vertical impact displacement , overload and energy absorption of the fuselage section. Simulation results reveal the relationship between the fuel weight and the responses and failure of the fuselage section. Numerical results show that most of the impact energy is absorbed by the stiffening frame and out2skin , and that the energy absorbed by the fuel tank cannot be ignored when there is a lot of water in it. Recommendations are made to the pilots to deal with emergency landing or survive crash conditions. Key words : arbitraryLagrangian/Euleriancoupling; crashworthiness;fuel tank;fuselage section
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