鸟撞飞机风挡夹层结构数值分析  

Numerical Analyses of Bird Strike Aircraft Multilayer Windshield

作　　者：张博平[1] 孙秦[1] 李玉龙[1] 

机构地区：[1]西北工业大学航空学院,陕西西安710072

出　　处：《航空计算技术》2008年第1期6-8,22,共4页Aeronautical Computing Technique

基　　金：国防科技工业民用专项科研技术研究项目(N6BM0001)

摘　　要：用非线性显式动力分析软件LS-DYNA建立了风挡夹层结构有限元模型,鸟体用ALE格式和与应变率相关的随动硬化材料模型,风挡夹层用Lagrange格式和双线性随动硬化材料模型,对鸟撞击风挡进行了数值计算,分析了夹层结构应力分布,为飞机风挡设计提供理论依据。A numerical analysis model for bird striking multilayer windshield structure has been established with the non - linear, explicit dynamics finite element program LS - DYNA. The bird was represented by an idealized geometry and the material model was defined by a kinematical hardening model with strain rate dependency. An ALE element for- mulation was used to represent the motion of the bird, whereas the multilayer windshield was described by a Lagrangian reference configuration. The windshield material was defined by a bilinear model. The stresses distributed of bird impacting multilayer windshield were calculated and analyzed. The result of numerical simulation offers a theoretical reference for aircraft multilayer windshield design.

关 键 词：鸟撞击 风挡夹层结构 接触-碰撞 应力分析 

分 类 号：O242[理学—计算数学]