基于有限元的桥梁垮塌场景模拟初探
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摘要
为了科学而逼真地还原桥梁垮塌过程,辅助桥梁垮塌事故鉴定,本文在虚拟现实平台上对基于有限元数据的桥梁垮塌过程场景模拟进行了研究。基于桥梁垮塌过程的有限元模拟数据,本文在三维图形引擎OSG上实现了桥梁场景建模和垮塌动画模拟,并基于桥梁垮塌模型构建了具有一定真实感的场景漫游系统。通过场景模拟与有限元模拟的结果对比,证明了本文基于有限元的桥梁场景建模和垮塌动画控制方法的有效性。本文将有限元技术与虚拟现实技术相结合,为桥梁垮塌事故鉴定提供了科学而真实的虚拟场景。
To replay the process of bridge collapse scientifically and realistically and assist the technical appraisals for bridge collapse accidents,the scene simulation of bridge collapse on VR platform based on FEM is studied in this paper.By the data of FEM simulation of bridge collapse,the bridge scene model and the animation of bridge collapse are realized in 3D graphic engine OSG.Based on the model of bridge collapse,a scene walkthrough system with realistic graphics is developed in this paper.By comparing the animation of bridge collapse in OSG with the FEM simulation of bridge collapse,the methods of creating bridge scene model and realizing the animation of bridge collapse prove to be operative.This paper combines FEM simulation and VR simulation to provide a scientific and realistic virtual scene for the technical appraisals of bridge collapse accidents.
To replay the process of bridge collapse scientifically and realistically and assist the technical appraisals for bridge collapse accidents,the scene simulation of bridge collapse on VR platform based on FEM is studied in this paper.By the data of FEM simulation of bridge collapse,the bridge scene model and the animation of bridge collapse are realized in 3D graphic engine OSG.Based on the model of bridge collapse,a scene walkthrough system with realistic graphics is developed in this paper.By comparing the animation of bridge collapse in OSG with the FEM simulation of bridge collapse,the methods of creating bridge scene model and realizing the animation of bridge collapse prove to be operative.This paper combines FEM simulation and VR simulation to provide a scientific and realistic virtual scene for the technical appraisals of bridge collapse accidents.
引文
[1]陈明宪.从凤凰堤溪大桥事故谈石拱桥[J].公路工程.2008.06,33(3):1-9.
[2]Zhu,S.,Levinson,D.,Liu,H.and Harder,K.The traffic and behavioral effects of the I-35W Mississippi river bridge collapse[C].Transportation Research Board Annual Meeting 2009 Paper #09-2164,2009.
[3]NIST.Final report on the collapse of world trade centre building 7[R].2008,11.
[4]Baylot,JT.Numerical Simulation of Alternate Scenario for Khobar Towers[C].Proceedings of 68th Shock and Vibration Symposium(Limited Distribution),Hunt Valley MD,1997.
[5]National Transportation Safety Board.Highway Accident Report-Collapse of Interstate 35W Highway Bridge[EB/ OL].http://www.ntsb.gov/events/2008/minneapolismn /presentations.htm,2010-8-19.
[6]D.Isobe,M.Tsuda.Seismic collapse analysis of reinforced concrete framed structures using the finite element method[J].Earthquake Engineering and Structural Dynamics, 2003,32(13):2027-2046.
[7]陆新征,叶列平,江见鲸等.考虑地震行波效应大型高架桥梁破坏模拟[J].工程抗震与改造加固,2007,29 (3):1-5.
[8]Kumar P and Bhandari NM.Non-linear Finite Element Analysis of Masonry Arches for Prediction of Collapse Load [J].Structural Engineering International,2005,15(3): 166-175.
[9]吴祚宝,肖田元.虚拟制造环境下有限元分析的应用[J].清华大学学报(自然科学版),2000,40(7): 66-69.
[10]吴鹏,赵龙,王勇军等.一种于基于有限元的形变模型算法[J].系统仿真学报,2001,13(5):674-677.
[11]Igor N.et al..Real-time simulation of elastic objects in virtual environments using finite element method and precomputed Green's functions,Proceedings of the workshop on virtual environments 2002(Wolfgang S.and Stefan M.,editors),Barcelona,Spain,2002,47-52.
[12]于巍,吴炜煜.三维可视化仿真技术与灾害虚拟表现[J].中国体视学与图像分析,2001,6(2)122-127.
[13]陈俊涛,肖明,郑永兰.用OpenGL开发地下结构工程三维有限元图形系统[J].岩石力学与工程学报, 2006,25(5):1015-1020.
[14]肖鹏,刘更代,徐明亮.OpenSceneGraph三维渲染引擎编程指南[M].北京:清华大学出版社,2010.
[15]王锐,钱学雷.OpenSceneGraph三维渲染引擎设计与实践[M].北京:清华大学出版社,2009.
[2]Zhu,S.,Levinson,D.,Liu,H.and Harder,K.The traffic and behavioral effects of the I-35W Mississippi river bridge collapse[C].Transportation Research Board Annual Meeting 2009 Paper #09-2164,2009.
[3]NIST.Final report on the collapse of world trade centre building 7[R].2008,11.
[4]Baylot,JT.Numerical Simulation of Alternate Scenario for Khobar Towers[C].Proceedings of 68th Shock and Vibration Symposium(Limited Distribution),Hunt Valley MD,1997.
[5]National Transportation Safety Board.Highway Accident Report-Collapse of Interstate 35W Highway Bridge[EB/ OL].http://www.ntsb.gov/events/2008/minneapolismn /presentations.htm,2010-8-19.
[6]D.Isobe,M.Tsuda.Seismic collapse analysis of reinforced concrete framed structures using the finite element method[J].Earthquake Engineering and Structural Dynamics, 2003,32(13):2027-2046.
[7]陆新征,叶列平,江见鲸等.考虑地震行波效应大型高架桥梁破坏模拟[J].工程抗震与改造加固,2007,29 (3):1-5.
[8]Kumar P and Bhandari NM.Non-linear Finite Element Analysis of Masonry Arches for Prediction of Collapse Load [J].Structural Engineering International,2005,15(3): 166-175.
[9]吴祚宝,肖田元.虚拟制造环境下有限元分析的应用[J].清华大学学报(自然科学版),2000,40(7): 66-69.
[10]吴鹏,赵龙,王勇军等.一种于基于有限元的形变模型算法[J].系统仿真学报,2001,13(5):674-677.
[11]Igor N.et al..Real-time simulation of elastic objects in virtual environments using finite element method and precomputed Green's functions,Proceedings of the workshop on virtual environments 2002(Wolfgang S.and Stefan M.,editors),Barcelona,Spain,2002,47-52.
[12]于巍,吴炜煜.三维可视化仿真技术与灾害虚拟表现[J].中国体视学与图像分析,2001,6(2)122-127.
[13]陈俊涛,肖明,郑永兰.用OpenGL开发地下结构工程三维有限元图形系统[J].岩石力学与工程学报, 2006,25(5):1015-1020.
[14]肖鹏,刘更代,徐明亮.OpenSceneGraph三维渲染引擎编程指南[M].北京:清华大学出版社,2010.
[15]王锐,钱学雷.OpenSceneGraph三维渲染引擎设计与实践[M].北京:清华大学出版社,2009.
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