冲击荷载下K8单层球面网壳的破坏类型
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摘要
首先介绍求解冲击问题解析法与数值法的算法基础,以及有限元求解的基本解法(中心差分法)。之后介绍了以上述为理论基础的计算冲击荷载的国际通用有限元软件ANSYS/LS-DYNA。并分别用解析法与有限元软件求解同一简单模型,互相校核;二者结论接近,验证了软件求解功能及相关参数设置的正确性。随后在ANSYS/LS-DYNA软件中建立了60m跨度K8型单层球面网壳抗冲击模型,在上述基础上,通过对135个算例的分析总结,根据竖向变形与塑性发展情况总结了K8单层球面网壳结构在顶点冲击荷载下的五种破坏类型及其分布规律。
This paper introduces briefly the analytical methods and numerical methods to solve non-linear problems, and then ANSYS/LS-DYNA, a finite element software. In order to validate the function of software and the parameter selection, solutions of a simple problem are obtained by the analytical method and ANSYS/LS-DYNA respectively, and good agreement is achieved. Finally, the model of Kiewitt8 single-layer reticulated dome with a span of 60m is set up, and 135 cases are analyzed, with five failure patterns observed.
This paper introduces briefly the analytical methods and numerical methods to solve non-linear problems, and then ANSYS/LS-DYNA, a finite element software. In order to validate the function of software and the parameter selection, solutions of a simple problem are obtained by the analytical method and ANSYS/LS-DYNA respectively, and good agreement is achieved. Finally, the model of Kiewitt8 single-layer reticulated dome with a span of 60m is set up, and 135 cases are analyzed, with five failure patterns observed.
引文
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[2]熊世树,潘琴存,熊明祥.钢框架组合结构的冲击倒塌分析与防倒措施研究[J].铁道工程学报,2006,8:55―57.Xiong Shishu,Pan Qincun,Xiong Mingxiang.The collapsed analysis and study of protective methods of steel frame with composite slab under impact load[J].Journal of Railway Engineering Society,2006,8:55―57.(in Chinese)
[3]熊明祥.钢框架组合结构的冲击响应和防护措施研究[D].武汉:华中科技大学,2005.Xiong Mingxiang.Study of the response and protective methods of steel structure with composite slab under impact loads[D].Wuhan:Huazhong University of Science&Technology,2005.(in Chinese)
[4]陆新征,江见鲸.世界贸易中心飞机撞击后倒塌过程的仿真分析[J].土木工程学报,2001,34(6):8―10.Lu Xinzheng,Jiang Jianjing.Dynamic finite element simulation for the collapse of world trade center[J].China Civil Engineering Journal,2001,34(6):8―10.(inChinese)
[5]赵振东,钟江荣,余世舟.钢混结构物受外来飞射体撞击的破坏效应研究[J].地震工程与工程振动,2003,23(5):89―94.Zhao Zhendong,Zhong Jiangrong,Yu Shizhou.Study on damage to reinforced concrete structures by impacting of an aircraft.[J].Earthquake Engineering and Engineering Vibration,2003,23(5):89―94.(in Chinese)
[6]郭可.单层球面网壳在冲击荷载作用下的动力响应分析[D].太原:太原理工大学,2004.Guo Ke.Dynamic analysis of singgle-layer reticulated shells under impact[D].Taiyuan:Taiyuan University of Technology,2004.(in Chinese)
[7]史俊亮.K8型单层网壳在撞击荷载作用下的动力响应研究[D].太原:太原理工大学,2005.Shi Junliang.Dynamic response research on K8singgle-layer reticulated dome under impact[D].Taiyuan:Taiyuan University of Technology,2005.(in Chinese)
[8]李海旺,郭可,魏剑伟,秦冬祺.撞击载荷作用下单层球面网壳动力响应模型实验研究[J].爆炸与冲击,2006,26(1):39―45.Li Haiwang,Guo Ke,Wei Jianwei,Qin Dongqi.The dynamic response of a single-layer reticulated shell to drop hammer impact[J].Explosion and Shock Waves,2006,26(1):39―45.(in Chinese)
[9]安世亚太北京有限公司,ANSYS/LS-DYNA使用指南[M].北京:安世亚太,1999.Pera Global(Beijing)Limited Company,ANSYS/LS-DYNA User's guide[M].Beijing:Pera Global,1999.(in Chinese)
[10]Karagiozova D,Alves M.Transition from progressive buckling to global bending of circular shells under axial impact––Part I:Experimental and numerical observations[J].International Journal of Solids and Structures,2004,41:1565―1580.
[11]Karagiozova D,Alves M.Transition from progressive buckling to global bending of circular shells under axial impact––Part II:Theoretical analysis[J].International Journal of Solids and Structures,2004,41:1581―1604.
[12]杜庆华,熊祝华,陶学义.应用固体力学[M].北京:高等教育出版社,1987.Du Qinghua,Xiong Zhuhua,Tao Xueyi.Solid mechanics[M].Beijing:China Higher Education Press,1987.(in Chinese)
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