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典型梁-缘结构鸟撞破坏的有限元分析
引用本文:ZHANG Yong-kang,李玉龙,WANG Hai-qing.典型梁-缘结构鸟撞破坏的有限元分析[J].爆炸与冲击,2008,28(3):236-242.
作者姓名:ZHANG Yong-kang  李玉龙  WANG Hai-qing
作者单位:1.西北工业大学航空学院,陕西 西安 710072;
基金项目:国防科技工业民用专项科研技术研究项目
摘    要:以某特种飞机机身处典型支撑结构为对象,建立了鸟撞击多层间隙梁-缘结构的三维有限元分析模型。在给定的三种工况下,运用大型非线性动力学有限元分析程序ANSYS/LS-DYNA的ALE-Lagrange耦合运算功能,计算得到了鸟撞击关键部位的数值结果及结构的鸟撞临界速度,考察了不同撞击点对结构动响应的影响,分析了结构鸟撞破坏机理,经与全尺寸实验结果比较,不论是结构的变形量还是破坏模式,两者均吻合较好,从而证明了本文方法及模型的正确性。

关 键 词:固体力学    临界速度    有限元分析    梁-缘结构    鸟撞

Finite element analysis of bird impact damage to representative beam-edge structure
ZHANG Yong-kang,LI Yu-long,WANG Hai-qing.Finite element analysis of bird impact damage to representative beam-edge structure[J].Explosion and Shock Waves,2008,28(3):236-242.
Authors:ZHANG Yong-kang  LI Yu-long  WANG Hai-qing
Institution:1.School of Aeronautics, Northwestern Polytechnical University, Xi’an  710072, Shaanxi, China;2.Aircraft Design & Research Institute, Shaanxi Aircraft Industry (Group) Co Ltd, Hanzhong 723214, Shaanxi, China
Abstract:The 3D finite element analysis model for multi-layered spaced beam-edge structure under bird impact is established by taking the typical fuselage support structure of a certain type airplane as the object. Numerical results of the crucial parts during bird impact are obtained by using the ALE-Lagrange coupling method in the non-linear program (ANSYS/LS-DYNA), and the critical velocity when the beam-edge structure fails is achieved. The effects on structure response of different impact locations are investigated, and the structure failure mechanism for bird impact is analyzed. Both the structure deformation and failure mode from the simulation are consistent with the results of the prototype test, which proves the validity of the method and model proposed in this paper.
Keywords:solid mechanics  critical velocity  finite element analysis  beam-edge structure  bird impact
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