粘弹性人工边界ABAQUS二次开发及应用
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摘要
在地震作用下,采用无质量固定边界模型会引入不真实的反射地震波,无法模拟地震波的远域能量逸散效应。基于波动理论及ABAQUS有限元软件二次开发功能实现了粘弹性单元的开发和外源波动的输入。采用粘弹性人工边界模拟地震波外源波动的远域能量逸散效应,并与固定边界模型计算结果比较。数值模拟结果表明粘弹性人工边界计算结果更接近地震波的真实传播。开发的粘弹性人工边界单元提高了ABAQUS的适用性,对促进大型或复杂工程的粘弹性人工边界波动分析具有潜在的应用价值。
With earthquake excitation,the fixed boundary model without consideration of the mass of foundation will introduces nonexistent reflection seismic waves and can not simulate the real transmission of seismic waves.Based on wave motion theories and the redevelopment of ABAQUS finite element software,the development of visco-elastic elements and external waves accurate input were realized.Using visco-elastic artificial boundary to simulate external waves far field energy dissipation,the results are compared with those by fixed boundary model.The results show that the artificial boundary gives more realistic simulation of seismic wave transmission.The redevelopment of visco-elastic artificial boundary improves the feasibility of ABAQUS,which has the potential application value to promote the applicability of visco-elastic artificial boundary in the large or complex engineering.
With earthquake excitation,the fixed boundary model without consideration of the mass of foundation will introduces nonexistent reflection seismic waves and can not simulate the real transmission of seismic waves.Based on wave motion theories and the redevelopment of ABAQUS finite element software,the development of visco-elastic elements and external waves accurate input were realized.Using visco-elastic artificial boundary to simulate external waves far field energy dissipation,the results are compared with those by fixed boundary model.The results show that the artificial boundary gives more realistic simulation of seismic wave transmission.The redevelopment of visco-elastic artificial boundary improves the feasibility of ABAQUS,which has the potential application value to promote the applicability of visco-elastic artificial boundary in the large or complex engineering.
引文
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[2]黄强兵,彭建兵.基于地震波入射角的地下管道地震应力计算[J].地下空间与工程学报,2008,4(5):979-984.(Huang Qiangbing,Peng Jianbin.Calculationabout earthquake stress for underground pipeline basedon the incident angle of earthquake wave[J].ChineseJournal of Underground Space and Engineering,2008,4(5):979-984.(in Chinese))
[3]Lysmer J,Kuhlemeyer R L.Finite dynamic model forinfinite media[J].Journal of Engineering Mechanics,ASCE,1969,95(1):759-877.
[4]Deeks A J,Randolph M F.Axisymmetric time-domaintransmitting boundaries[J].Journal of EngineeringMechanics,1994,120(1):25-42.
[5]杜修力,赵密,王进廷.近场波动模拟的应力人工边界条件[J].力学学报,2006,38(1):49-56.(DuXiuli,Zhao Mi,Wang Jinting.A stress artificialboundary in FEA for near-field wave problem[J].Chinese Journal of Theoretical and Applied Mechanics,2006,38(1):49-56.(in Chinese))
[6]Somnath Ghosh,Kyunghoon Lee.Small deformationmulti-scale analysis of heterogeneous materials with thevoronoi cell finite element model and homogenizationtheory[J].Computional Materials Science 1996,7:131-146.
[7]Gyoo-Dong Jung,Sung-KieYoun,Bong-Kyu Kim.Athree-dimensional nonlinear viscoelastic constitutivemodel of solid propellant[J].International Journal ofSolid and Structures,2000,37:4 715-4 732.
[8]徐远杰,王观琪,李健,等.在ABAQUS中开发实现Duncan-Chang模型[J].岩土力学,2004,25(7):1 032-1 036.(Xu Yuanjie,Wang Guanqi,Li Jian,etal.Development and implementation of Duncan-Changconstitutive model in ABAQUS[J].Rock and SoilMechanics,2004,25(7):1 032-1 036.(in Chinese))
[9]刘晶波,吕彦东.结构-地基动力相互作用问题分析的一种直接方法[J].土木工程学报,1998,31(3):55-64.(Liu Jingbo,Lv Yandong.A direct method foranalysis of dynamic soil-structure interaction[J].ChinaCivil Engineering Journal,1998,31(3):55-64.(inChinese))
[10]刘晶波,谷音,杜义欣.一致粘弹性人工边界及粘弹性边界单元[J].岩土工程学报,2006,28(9):1 070-1 075.(Liu Jingbo,Gu Yin,Du Yixin.Consistent viscous-spring artificial boundaries andviscous-spring boundary elements[J].Chinese Journalof Geotechnical Engineering,2006,28(9):1 070-1 075.(in Chinese))
[11]艾龙根,舒胡毕.弹性动力学[M].北京:石油工业出版社,1984.(Eringen A.C.,Suhubi E.S.Elastodynamics[M].Beijing:Petroleum Industry Press,1984.(in Chinese))
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