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Science China Earth Sciences 2007年第11期50卷 1655-1662页

作者： michel bouchon Université Joseph Fourier F38041 Grenoble France

The spatiotemporal evolution patterns of complete Coulomb stress changes caused by 1988 Ms7.6 earthquake in Lancang-Gengma, Yunnan, are calculated and studied. And the triggering problems of Ms7.2 Gengma shock occurring 13 minutes after the main shock and of Ms5.0―6.9 aftershocks within 24 days after the main shock are discussed. The results show that the spatial distribution patterns of complete Coulomb stress changes of the Ms7.6 main shock are strongly asymmetric. The areas of positive dynamic and static Coulomb stress are both coincident well with the strong aftershocks' loca-tions. The Ms7.2 Gengma shock and most of strong aftershocks are subjected to the triggering effect of dynamic and static Coulomb stresses induced by the Ms7.6 Lancang earthquake.

关键词： complete Coulomb stress changes,dynamic and static stress triggering,earthquakes in Yunnan

Discrete wavenumber solutions to numerical wave propagation in piecewise heterogeneous media-Ⅰ.Theory of two-dimensional SH case

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Discrete wavenumber solutions to numerical wave propagation ...

完全库仑破裂应力变化与云南龙陵震群序列的应力触发

中国科学院地质与地球物理研究所2004学术年会

作者： michel bouchon Labaratoire de Geophysique Interne et Tectonophysique.Universite Joseph Fourier.BP53X Grenoble Cedex 38041France

A semi-analytical,semi-numerical method of seismogram synthesis is presented for piecewise heterogeneous media resulting from an arbitrary *** method incorporates the discrete wavenumber Green’s function representation into the boundary-volume integral equation numerical *** presentation is restricted to 2-D antiplane motion(SH waves).To model different parts of the media to a necessary accuracy,the incident,boundary-scattering and volume-scattering waves are separately formulated in the discrete wavenumber domain and handled flexibly at various accuracies using approximation *** waves are accurately superposed through the generalized Lippmann-Schwinger integral(GLSI) equation. The full-waveform boundary method is used for the boundary-scattering wave to accurately simulate the reflection/transmission across strong-contrast *** for volume heterogeneities,the following four flexible approaches have been developed in the numerical modelling scheme present here,with a great saving of computing time and memory: (i) the solution implicitly for the volume-scattering wave with high accuracy to model subtle effects of volume heterogeneities;(ii) the solution semi-explicitly for the volume-scattering wave using the average Fresnelradius approximation to volume integrations to reduce numerical burden by making the coefficient matrix sparser;(iii)the solution explicitly for the volume-scattering wave using the first-order Born approximation for smooth volume heterogeneities;and (iv)the solution explicitly for the volume-scattering wave using the second-order/high-order Born approximation for practical volume heterogeneities. These solutions are tested for dimensionless frequency responses to a heterogeneous alluvial valley where the velocity is perturbed randomly in the range of ca 5-20 per cent,which is not rare in most complex near-surface *** experiments indicate that several times of site amplification can be expecte

关键词： discrete wavenumber representation generalized Lippmann-Schwinger integral equation piecewise heterogeneous media 2-D SH waves wave propagation

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地球物理学报 2007年第4期50卷 1111-1122页

作者：吴小平付虹 michel bouchon 胡家富胡毅力黄雍虎雄林解朝娣云南大学地球物理系云南省地震局 Universit Joseph Fourier F38041 Grenoble France

计算和研究了1976年云南龙陵Ms7.3、Ms7.4双主震产生的完全库仑破裂应力变化及其对后续震群序列的动态和静态应力触发作用.结果显示,龙陵第2主震受到了第1主震的动态和静态库仑破裂应力的触发作用.龙陵双主震的13个后续强余震中,发生在... 详细信息

计算和研究了1976年云南龙陵Ms7.3、Ms7.4双主震产生的完全库仑破裂应力变化及其对后续震群序列的动态和静态应力触发作用.结果显示,龙陵第2主震受到了第1主震的动态和静态库仑破裂应力的触发作用.龙陵双主震的13个后续强余震中,发生在龙陵三角形块体内部的强余震,90%都受到了第1或第2主震的动态库仑破裂应力触发或静态库仑破裂应力触发作用,发生在三角形块体外部的强余震,2/3受到了第2主震的动态库仑破裂应力触发作用.从触发作用的强度和范围上看,第2主震的动态和静态库仑破裂应力触发作用都大于第1主震.就近场而言,受到龙陵双主震的动态和静态库仑破裂应力触发作用的余震数目相当,但动态库仑破裂应力的触发作用范围大于静态库仑破裂应力.

关键词：完全库仑破裂应力变化动态和静态库仑破裂应力触发云南地震

云南澜沧-耿马Ms7.6地震的完全库仑破裂应力变化与后续地震的动态、静态应力触发

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中国科学（D辑） 2007年第6期37卷 746-752页

作者：吴小平虎雄林 michel bouchon 黄雍胡家富解朝娣王绍晋胡毅力云南大学地球物理系 Université Joseph Fourier F38041 GrenobleFrance 云南省地震局

计算和研究了1988年云南澜沧-耿马Ms7.6地震产生的完全库仑破裂应力变化的时空演化图像,对继澜沧地震13min后发生的耿马M7.2地震的应力触发问题进行了分析,同时也对澜沧-耿马地震后24d内发生的Ms5.0-6.9后续强余震的应力触发问题进行了... 详细信息

计算和研究了1988年云南澜沧-耿马Ms7.6地震产生的完全库仑破裂应力变化的时空演化图像,对继澜沧地震13min后发生的耿马M7.2地震的应力触发问题进行了分析,同时也对澜沧-耿马地震后24d内发生的Ms5.0-6.9后续强余震的应力触发问题进行了探讨.结果显示,澜沧地震断层破裂产生的完全库仑破裂应力变化空间分布图像具有很强的非对称性,正值的动态和静态库仑破裂应力变化区域均具有与强余震分布位置吻合较好的现象.耿马Ms7.2地震受到了澜沧Ms7.6地震产生动态和静态库仑破裂应力的触发作用;绝大多数后续强余震受到了动、静态库仑破裂应力的综合触发作用.

关键词：完全库仑破裂应力变化动态和静态库仑破裂应力触发云南地震

1999年土耳其Izmit M_W7.6地震的持续成核过程

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国际地震动态 2011年第5期32卷 18-26页

作者： michel bouchon Hayrullah Karabulut Mustafa Aktar Serdar zalaybey Jean Schmittbuhl Marie-Paule Bouin 左玉玲 Centre National de la Recherche Scientifique and Université Joseph Fourier GrenobleISTerre Kandilli Observatory and Earthquake Research Institute Bogazii University TBITAK Marmara Research CenterEarth and Marine Sciences Institute Centre National de la Recherche Scientifique and Université de Strasbourg Ecole et Observatoire des Sciences de la Terre Centre National de la Recherche Scientifique and Institut de Physique du Globe de Paris Observatoire Volcanologique et Sismologique de Guadeloupe 中国地震局地球物理研究所

实验室和理论研究表明,地震之前会出现一个渐进性的滑动不稳定阶段,在此期间,断层缓慢滑动,而后突然加速并最终导致动态破裂。本文中,我们报道了迄今记录最为完整的大地震之一,即1999年土耳其Izmit MW7.6地震之前出现了持续时间很久的... 详细信息

实验室和理论研究表明,地震之前会出现一个渐进性的滑动不稳定阶段,在此期间,断层缓慢滑动,而后突然加速并最终导致动态破裂。本文中,我们报道了迄今记录最为完整的大地震之一,即1999年土耳其Izmit MW7.6地震之前出现了持续时间很久的源自震源的地震信号。这种信号包含一连串的地震破裂,破裂随时间和低频地震噪声的增加而加速。这些观测结果表明,此次地震之前在脆性地壳底部出现了44min的缓慢滑动。滑动最初呈缓慢加速,然后在地震发生前2min内又突然加速。

关键词：大地震土耳其成核过程地震破裂地震信号持续时间地震噪声地震发生

层状介质中充满流体井发射的声波波场和弹性波场数值模拟

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油气藏评价与开发 1994年第1期 86-86页

作者： michel bouchon

本文提出了一种计算方法,该方法能模拟层状介质中井中产生的声波和弹性波的传播。该方法是用稀疏波数法计算的格林函数的边界元素技术来系统阐述的。特定的假设前提是钻孔是筒形的,而且钻孔的轴线垂直于地层界面。方法在物理上基于惠更... 详细信息

本文提出了一种计算方法,该方法能模拟层状介质中井中产生的声波和弹性波的传播。该方法是用稀疏波数法计算的格林函数的边界元素技术来系统阐述的。特定的假设前提是钻孔是筒形的,而且钻孔的轴线垂直于地层界面。方法在物理上基于惠更斯原理,它表明:可把绕射边界——井壁(在目前情况下)看成是分布的二次震源。井孔可被分解成许多小筒形单元,每个单元可用三个震源表示:表示在流体中绕射波场的一个体积震源和二个产生向井孔外辐射的弹性波场的表面力。每个震源的强度可通过解描述井

关键词：波场流体弹性力学性能

Some Fuzzy Logic Based Methods to Deal with Sensorial Information

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Journal of Donghua University(English Edition) 2004年第3期21卷 5-8页

作者： Bernadette bouchon-Meunier CNRS-Université Pierre et Marie Curie LIP6 Pole IA 8 rue du Capitaine Scott75015 Paris France

Sensorial information is very difficult to elicit, to represent and to manage because of its complexity. Fuzzy logic provides an interesting means to deal with such information, since it allows us to represent imprecise, vague or incomplete descriptions, which are very common in the management of subjective information. Aggregation methods proposed by fuzzy logic are further useful to combine the characteristics of the various components of sensorial information.

关键词： Sensorial information. Fuzzy logic Possibility theory.

An Immersed Method Based on Cut-Cells for the Simulation of 2D Incompressible Fluid Flows Past Solid Structures

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Computer Modeling in Engineering & Sciences 2019年第4期119卷 165-184页

作者： Francois bouchon Thierry Dubois Nicolas James Université Clermont Auvergne CNRSLMBPF-63000 CLERMONT-FERRANDFrance Laboratoire de Mathématiques et Applications UMR 7348 Universitéde PoitiersTéléport 2-B.P.30179Boulevard Marie et Pierre Curie86962 Futuroscope Chasseneuil CedexFrance

We present a cut-cell method for the simulation of 2D incompressible flows past *** consists in using the MAC scheme on cartesian grids and imposing Dirchlet boundary conditions for the velocity field on the boundary of solid structures following the Shortley-Weller *** order to ensure local conservation properties,viscous and convecting terms are discretized in a finite volume *** scheme is second order implicit in time for the linear part,the linear systems are solved by the use of the capacitance matrix method for non-moving *** results of flows around an impulsively started circular cylinder are presented which confirm the efficiency of the method,for Reynolds numbers 1000 and *** example of flows around a moving rigid body at Reynolds number 800 is also shown,a solver using the PETSc-Library has been prefered in this context to solve the linear systems.

关键词： Immersed boundary methods cutt-cell methods incompressible viscous flows

A PERTURBATION METHOD FOR THE NUMERICAL SOLUTION OF THE BERNOULLI PROBLEM

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Journal of Computational Mathematics 2008年第1期26卷 23-36页

作者： Franois bouchon Stéphane Clain Rachid Touzani Laboratoire de Mathématiques Universite Blaise Pascal (Clermont-Ferrand) and CNRS (UMR 6620) Campus Universitaire des Cézeaux63177 Aubière cedexFrance Laboratoire MIP UFR MIGUniversité Paul Sabatier Toulouse 3118 route de Narbonne31062 Toulouse cedex 4France Laboratoire de Mathematiques Université Blaise Pascal (Clermont-Ferrand) and CNRS (UMR 6620) Campus Universitaire des Cézeaux63177 Aubière cedexFrance

We consider the numerical solution of the free boundary Bernoulli problem by employing level set formulations. Using a perturbation technique, we derive a second order method that leads to a fast iteration solver. The iteration procedure is adapted in order to work in the case of topology changes. Various numerical experiments confirm the efficiency of the derived numerical method.

关键词： Bernoulli problem Free boundary Level sets

On Some Elliptic Problems in Unbounded Domains

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Chinese Annals of Mathematics,Series B 2018年第3期39卷 597-606页

作者： michel CHIPOT Dedicated to Philippe G. Ciarlet on the occasion of his 80th birthda

The author presents a method allowing to obtain existence of a solution for some elliptic problems set in unbounded domains,and shows exponential rate of convergence of the approximate solution toward the solution.

关键词： Elliptic Exponential convergence Unbounded domains