地震前兆的数值模拟
|
摘要
针对均匀介质模型模拟地震前兆存在实际地壳介质不均匀、岩石破裂终止区域人为指定等不足,借助ANSYS 12.0数值模拟软件,采用不均匀介质模型模拟地震前兆现象。结果表明,弱介质区是地震前兆出现的主要区域,地震前兆的复杂性主要表现在弱介质区分布的复杂性。该结果能很好地解释地震空区、两头跳和密集—平静—大震的地震前兆现象,为地震预测研究提供了借鉴。
Aimed at seeking an alternative to homogeneous geological model which suffers disadvantages,such as,inhomogeneity of practical crustal media and manual specification of terminal region of rock failure,in simulating seismic precursor,this paper introduces inhomogeneous geological model to simulate seismic precursor by means of ANSYS 12.0 numerical simulation software.The simulations show that weak medium areas are main areas where seismic precursor may occur,and complexity of seismic precursor may mainly lie in complicated distributions of weak medium areas.The simulations prove a better explanation for seismic gap,earthquake prediction models of bilateral jumping and denseness-quietude-large earthquake and are very beneficial to study of seismic forecasting.
Aimed at seeking an alternative to homogeneous geological model which suffers disadvantages,such as,inhomogeneity of practical crustal media and manual specification of terminal region of rock failure,in simulating seismic precursor,this paper introduces inhomogeneous geological model to simulate seismic precursor by means of ANSYS 12.0 numerical simulation software.The simulations show that weak medium areas are main areas where seismic precursor may occur,and complexity of seismic precursor may mainly lie in complicated distributions of weak medium areas.The simulations prove a better explanation for seismic gap,earthquake prediction models of bilateral jumping and denseness-quietude-large earthquake and are very beneficial to study of seismic forecasting.
引文
[1]李勇,周荣军,董顺利,等.汶川地震的地表破裂与逆冲走滑作用[J].成都理工大学学报:自然科学版,2008,35(4):404-413.
[2]王卫民,赵连锋,李娟,等.四川汶川8.0级地震震源过程[J].地球物理学报,2008,51(5):1403-1410.
[3]王金龙,王清明,王伟章.ANSYS12.0有限元分析与范例解析[M].北京:机械工业出版社,2010:5.
[4]李围,叶裕明,刘春山,等.ANSYS土木工程应用实例[M].北京:中国水利水电出版社,2007:78-83.
[5]赵春香,杨德生,齐辉,等.砌体墙片抗震破坏有限元分析[J].黑龙江科技学院学报,2011,21(3):194-197.
[6]MADARIAGA,OLSEN,ARCHULETA R.Modeling dynamic rup-ture in a 3D earthquake fault model[J].BSSA,1998,88(5):1182-1197.
[7]ZHANG WENBO,LWATA TOMOTAKA,LRIKURA K.Dynamicsimulation of the 1999 Chi-Chi,Taiwan,earthquake[J].J Geo-phys Res,2010,115,B04305,doi:10.1029/2008JB006201.
[8]陈顒.地壳岩石的力学性能[M].北京:地震出版社,1988:53-58.
[9]AKI K,RICHARDS P G.Quantitative seismology[M].Sausali-to,Calif:University Science Books,2002:585-586.
[10]尹祥础.固体力学[M].北京:地震出版社,1985:423-439.
[11]郭安宁,郭增建.从震源模式讨论2008年汶川8级地震的回顾性预测[J].地震地质,2010,32(1):115-126.
[12]曲延军,王海涛,邬成栋,等.中国大陆地震空区统计特征分析[J].地震学报,2010,32(5):544-556.
[13]梅世蓉,薛艳,宋治平.汶川8.0级与昆仑山口西8.1级地震前地震活动异常特征与启示[J].地震,2009,29(1):1-14.
[14]王泽皋,薛经,董书香,等.邢台地震综合特征分析与应用[J].高原地震,2006,18(2):1-13.
[2]王卫民,赵连锋,李娟,等.四川汶川8.0级地震震源过程[J].地球物理学报,2008,51(5):1403-1410.
[3]王金龙,王清明,王伟章.ANSYS12.0有限元分析与范例解析[M].北京:机械工业出版社,2010:5.
[4]李围,叶裕明,刘春山,等.ANSYS土木工程应用实例[M].北京:中国水利水电出版社,2007:78-83.
[5]赵春香,杨德生,齐辉,等.砌体墙片抗震破坏有限元分析[J].黑龙江科技学院学报,2011,21(3):194-197.
[6]MADARIAGA,OLSEN,ARCHULETA R.Modeling dynamic rup-ture in a 3D earthquake fault model[J].BSSA,1998,88(5):1182-1197.
[7]ZHANG WENBO,LWATA TOMOTAKA,LRIKURA K.Dynamicsimulation of the 1999 Chi-Chi,Taiwan,earthquake[J].J Geo-phys Res,2010,115,B04305,doi:10.1029/2008JB006201.
[8]陈顒.地壳岩石的力学性能[M].北京:地震出版社,1988:53-58.
[9]AKI K,RICHARDS P G.Quantitative seismology[M].Sausali-to,Calif:University Science Books,2002:585-586.
[10]尹祥础.固体力学[M].北京:地震出版社,1985:423-439.
[11]郭安宁,郭增建.从震源模式讨论2008年汶川8级地震的回顾性预测[J].地震地质,2010,32(1):115-126.
[12]曲延军,王海涛,邬成栋,等.中国大陆地震空区统计特征分析[J].地震学报,2010,32(5):544-556.
[13]梅世蓉,薛艳,宋治平.汶川8.0级与昆仑山口西8.1级地震前地震活动异常特征与启示[J].地震,2009,29(1):1-14.
[14]王泽皋,薛经,董书香,等.邢台地震综合特征分析与应用[J].高原地震,2006,18(2):1-13.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心