基于ADINA软基上地震动输入方法研究及其应用
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摘要
针对传统的刚性边界模型不能真实反映结构与地基的相互作用且对结构的动力响应影响较大的问题,研究了ADINA中实现软基上等效一致黏弹性人工边界及在该边界上波动输入的方法和技术,将其应用于某软基上泵站的三维结构—地基—水体有限元模型,在地震荷载下对结构进行动力分析,并与传统无质量地基模型结果进行对比,发现考虑地基辐射阻尼能有效降低泵站的动力响应,表明本文方法可行、有效。
Due to the traditional rigid boundary model failing to truly reflect the interaction between the structure and foundation and its great effect of structural dynamic response,the method and technology to realize equivalent consistent viscoelastic artificial boundary and wave imput on the boundary in ADINA are studied.It is applied to analyze three-dimensional structure-foundation-water finite element of pumping station in soft foundation.Dynamic analysis is made on the structure under the action of earthquake load.Then the results are compared to those of the traditional massless foundation model.It is found that the foundation radiation damping can effectively reduce dynamic response of pumping station.Therefore,the proposed method is feasible and effective.
Due to the traditional rigid boundary model failing to truly reflect the interaction between the structure and foundation and its great effect of structural dynamic response,the method and technology to realize equivalent consistent viscoelastic artificial boundary and wave imput on the boundary in ADINA are studied.It is applied to analyze three-dimensional structure-foundation-water finite element of pumping station in soft foundation.Dynamic analysis is made on the structure under the action of earthquake load.Then the results are compared to those of the traditional massless foundation model.It is found that the foundation radiation damping can effectively reduce dynamic response of pumping station.Therefore,the proposed method is feasible and effective.
引文
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[3]廖振鹏.工程波动理论导论(第二版)[M].北京:科学出版社,2002.
[4]Lysmer J,Kulemeyer R L.Finite Dynamic Model forInfinite Media[J].Journal of the Engineering Me-chanics,1969,95(4):859-878.
[5]Deeks A J,Randolph M F.Axisymmetric Time-do-main Transmitting Boundaries[J].Journal of Engi-neering Mechanics,1994,120(1):25-42.
[6]刘云贺,张伯艳,陈厚群.拱坝地震输入模型中黏弹性边界与黏性边界的比较[J].水利学报,2006,37(6):758-763.
[7]谷音,刘晶波,杜义欣.三维一致粘弹性人工边界及等效粘弹性边界单元[J].工程力学,2007,24(12):31-37.
[8]谷音.结构—地基动力相互作用问题高效数值方法研究及工程应用[D].北京:清华大学,2005.
[9]杜修力,李密.基于黏弹性边界的拱坝地震反应分析方法[J].水利学报,2006,37(9):1 063-1 069.
[10]A C艾龙根,E S舒胡华.弹性动力学[M].戈革译.北京:石油工业出版社,1983.
[2]Clayton R W,Engquist B.Absorbing Boundary Con-ditions for Wave-equation Migration[J].Geophys-ics,1980,45(5):895-904.
[3]廖振鹏.工程波动理论导论(第二版)[M].北京:科学出版社,2002.
[4]Lysmer J,Kulemeyer R L.Finite Dynamic Model forInfinite Media[J].Journal of the Engineering Me-chanics,1969,95(4):859-878.
[5]Deeks A J,Randolph M F.Axisymmetric Time-do-main Transmitting Boundaries[J].Journal of Engi-neering Mechanics,1994,120(1):25-42.
[6]刘云贺,张伯艳,陈厚群.拱坝地震输入模型中黏弹性边界与黏性边界的比较[J].水利学报,2006,37(6):758-763.
[7]谷音,刘晶波,杜义欣.三维一致粘弹性人工边界及等效粘弹性边界单元[J].工程力学,2007,24(12):31-37.
[8]谷音.结构—地基动力相互作用问题高效数值方法研究及工程应用[D].北京:清华大学,2005.
[9]杜修力,李密.基于黏弹性边界的拱坝地震反应分析方法[J].水利学报,2006,37(9):1 063-1 069.
[10]A C艾龙根,E S舒胡华.弹性动力学[M].戈革译.北京:石油工业出版社,1983.
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