变截面S形薄壁梁的设计与耐撞性研究
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摘要
为了提高汽车前纵梁结构(S形薄壁梁)的耐撞性能,引入变截面设计思想对S形薄壁梁进行研究。基于LS-DYNA有限元分析软件,在轴向动态冲击载荷下开展变截面S形梁数值仿真,研究横截面轴向变化率、横截面几何形状和加强筋对变截面S形梁的耐撞性影响。结果表明,变截面S形梁与等截面S形梁相比在结构吸能方面有较大提升,合理设计横截面轴向变化率、横截面几何形状和加强筋可以显著地提升结构的吸能效果,为汽车吸能部件的设计提供重要参考
In order to improve the crashworthiness of the front side frame structure(thin-walled S-shaped beam),thin-walled S-shaped beam is studied by introducing variable cross-section design. Based on the finite element analysis software LS-DYNA,to simulate the S-shaped beam with variable cross-section under dynamic axial impacting load,studying the influence of cross-section change rate along the longitudinal direction,cross-section geometry and inner stiffeners on crashworthiness of S-shaped beam with variable cross-section. The results show that the S-shaped beam with variable crosssection has great advantages on energy absorption over the traditionally S-shaped beam,reasonably designing cross-section change rate along the longitudinal,cross-section geometry and inner stiffeners can obviously enhance energy absorption of structure,and the investigation provides significant reference to automobile energy absorbing component design.
In order to improve the crashworthiness of the front side frame structure(thin-walled S-shaped beam),thin-walled S-shaped beam is studied by introducing variable cross-section design. Based on the finite element analysis software LS-DYNA,to simulate the S-shaped beam with variable cross-section under dynamic axial impacting load,studying the influence of cross-section change rate along the longitudinal direction,cross-section geometry and inner stiffeners on crashworthiness of S-shaped beam with variable cross-section. The results show that the S-shaped beam with variable crosssection has great advantages on energy absorption over the traditionally S-shaped beam,reasonably designing cross-section change rate along the longitudinal,cross-section geometry and inner stiffeners can obviously enhance energy absorption of structure,and the investigation provides significant reference to automobile energy absorbing component design.
引文
[1]荆友录.基于有限元法的矩形薄壁梁轴向耐撞性能优化[J].机械设计与制造,2009(12):36-38.(Jing You-lu.Axial crashworthiness optimization of thin-walled rectangular beam based on finite element method[J].Machinery Design&Manufacture,2009(12):36-38.)
[2]Wu H,Xin Y.Optimal Design of the S-Rail for Crash-worthiness Analysis[J].International Joint Conference on Computational Sciences&Optimization,2009(2):735-738.
[3]Kim H-S,Wierzbicki T.Effect of the cross-sectional shape of hat-type cross-sections on crash resistance of an“S”-frame[J].Thin-Walled Structures,2001,39(7):535-554.
[4]Kim H-S,Wierzbicki T.Closed-form solution for crushing response of three-dimensional thin-walled“S”frames with rectangular cross-sections[J].International journal of impact engineering,2004,30(1):87-112.
[5]Zhang C,Saigal A.Crash behavior of a 3D S-shape space frame structure[J].Journal of materials processing technology,2007,191(1):256-259.
[6]侯淑娟,龙述尧,李青.薄壁构件的抗撞性优化设计[D].长沙:湖南大学,2007.(Hou Shu-juan,Long Shu-xiao,Li Qing.Optimal design of thin-walled sections for structural crashworthiness[D].Changsha:Hunan University,2007.)
[7]武和全,辛勇,胡宏伟.S形梁碰撞多参数优化设计[J].公路交通科技,2009,26(12):131-136.(Wu He-quan,Xin Yong,Hu Hong-wei.Parameters optimization of S-shaped rail for crashworthiness analysis[J].Journal of Highway and Transportation Research and Development,2009,26(12):131-136.)
[8]Nguyen V-S,Wen G,Yin H.Optimisation design of reinforced S-shaped frame structure under axial dynamic loading[J].International Journal of Crashworthiness,2014,19(4):385-393.
[9]亓昌,董方亮,杨姝.锥形多胞薄壁管斜向冲击吸能特性仿真研究[J].振动与冲击,2012,31(24):102-107.(Qi Chang,Dong Fang-liang,Yang Shu.Energy-absorbing characteristics of a tapered multi-cell thin-walled tube under oblique impact[J].Journal of Vibration and Shock,2012,31(24):102-107.)
[10]Overvelde J-T,Bertoldi K.Relating pore shape to the non-linear response of periodic elastomeric structures[J].Journal of the Mechanics and Physics of Solids,2014(64):351-366.
[2]Wu H,Xin Y.Optimal Design of the S-Rail for Crash-worthiness Analysis[J].International Joint Conference on Computational Sciences&Optimization,2009(2):735-738.
[3]Kim H-S,Wierzbicki T.Effect of the cross-sectional shape of hat-type cross-sections on crash resistance of an“S”-frame[J].Thin-Walled Structures,2001,39(7):535-554.
[4]Kim H-S,Wierzbicki T.Closed-form solution for crushing response of three-dimensional thin-walled“S”frames with rectangular cross-sections[J].International journal of impact engineering,2004,30(1):87-112.
[5]Zhang C,Saigal A.Crash behavior of a 3D S-shape space frame structure[J].Journal of materials processing technology,2007,191(1):256-259.
[6]侯淑娟,龙述尧,李青.薄壁构件的抗撞性优化设计[D].长沙:湖南大学,2007.(Hou Shu-juan,Long Shu-xiao,Li Qing.Optimal design of thin-walled sections for structural crashworthiness[D].Changsha:Hunan University,2007.)
[7]武和全,辛勇,胡宏伟.S形梁碰撞多参数优化设计[J].公路交通科技,2009,26(12):131-136.(Wu He-quan,Xin Yong,Hu Hong-wei.Parameters optimization of S-shaped rail for crashworthiness analysis[J].Journal of Highway and Transportation Research and Development,2009,26(12):131-136.)
[8]Nguyen V-S,Wen G,Yin H.Optimisation design of reinforced S-shaped frame structure under axial dynamic loading[J].International Journal of Crashworthiness,2014,19(4):385-393.
[9]亓昌,董方亮,杨姝.锥形多胞薄壁管斜向冲击吸能特性仿真研究[J].振动与冲击,2012,31(24):102-107.(Qi Chang,Dong Fang-liang,Yang Shu.Energy-absorbing characteristics of a tapered multi-cell thin-walled tube under oblique impact[J].Journal of Vibration and Shock,2012,31(24):102-107.)
[10]Overvelde J-T,Bertoldi K.Relating pore shape to the non-linear response of periodic elastomeric structures[J].Journal of the Mechanics and Physics of Solids,2014(64):351-366.