摘要
运用LS-DYNA有限元软件对方形、三角形、正弦形和梯形4种金属波纹梁结构进行了准静态加载和动态冲击加载试验仿真分析。从其变形模式和吸能特性两个方面,对仿真结果的数据进行对比分析。仿真结果表明:正弦波纹梁和梯形波纹梁形状保持较好;正弦波纹梁比吸能最大,且其初始峰值载荷和平均压溃载荷明显最小。所以选取正弦波纹梁作为机身货舱地板以下吸能结构能够取得良好的吸能特性和缓冲效果。
In order to select the aircraft waved beams structure with optimal energy absorption,the simulation analysis for quasi-static loading tests and dynamic impact tests were conducted by using finite element code LSDYNA on four kinds of metal waved beams structures,including square waved beam,triangle waved beam,sine waved beam and trapezoidal waved beam. The deformation modes and energy-absorbing characteristics of four waved beams structures were analyzed. The results show that the sine waved beams and trapezoidal waved beams can maintain good shapes. Specific energy absorption（ SEA） of sine waved beam is the maximal,while its original peak load（ Pcr） and average load（ Fm） are the minimal. The research results show that the sine waved beams can be selected as the energy-absorbing structures of the fuselage sub-floor because of the optimal energy absorption characteristics and cushioning effects.
出处
《机械科学与技术》
CSCD
北大核心
2014年第6期948-952,共5页
Mechanical Science and Technology for Aerospace Engineering
基金
中国民航局科技项目(MHRD201010)
中央高校基本科研业务费专项项目(ZXH2012B004)资助
关键词
飞机
波纹梁
有限元法
吸能特性
aircraft
computer simulation
constitutive models
deformation
energy absorption characteristics
energy absorption
finite element method
impact testing
waved beams
