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Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy最新文献

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Feedback minimax control for parabolic variational inequality 抛物型变分不等式的反馈极大极小控制
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy Pub Date : 2000-01-01 DOI: 10.1016/S1287-4620(00)88424-0
Vyacheslav Maksimov
{"title":"Feedback minimax control for parabolic variational inequality","authors":"Vyacheslav Maksimov","doi":"10.1016/S1287-4620(00)88424-0","DOIUrl":"10.1016/S1287-4620(00)88424-0","url":null,"abstract":"<div><p>The problems of feedback minimax control for parabolic variational inequalities are considered. Algorithms solving these problems which are stable with respect to informational noises and computational errors are outlined. The algorithms are based on the principle of feedback control with a model [1].</p></div>","PeriodicalId":100303,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy","volume":"328 1","pages":"Pages 105-108"},"PeriodicalIF":0.0,"publicationDate":"2000-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1287-4620(00)88424-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85669025","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Une méthode multiniveau pour la simulation des grandes échelles des écoulements turbulents compressibles 可压缩湍流大尺度模拟的多级方法
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy Pub Date : 2000-01-01 DOI: 10.1016/S1287-4620(00)88420-3
Marc Terracol , Pierre Sagaut , Claude Basdevant
{"title":"Une méthode multiniveau pour la simulation des grandes échelles des écoulements turbulents compressibles","authors":"Marc Terracol ,&nbsp;Pierre Sagaut ,&nbsp;Claude Basdevant","doi":"10.1016/S1287-4620(00)88420-3","DOIUrl":"10.1016/S1287-4620(00)88420-3","url":null,"abstract":"<div><p>A multilevel method for Large-Eddy Simulation of turbulent unsteady compressible flows is proposed. It relies on the splitting of the turbulent flowfield into several frequency bands in space and time, each band being associated to a computational grid in physical space, allowing to take into account in a deterministic way the information contained on finer grids. A subgrid-scale model adapted to such a decomposition — based on a generalization of the Germano's identity to multilevel decomposition — is also introduced. The approach is validated by a simulation in a subsonic plane channel flow configuration.</p></div>","PeriodicalId":100303,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy","volume":"328 1","pages":"Pages 81-86"},"PeriodicalIF":0.0,"publicationDate":"2000-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1287-4620(00)88420-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82823849","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
Analytic stress-strain relationship for isotropic network model of rubber elasticity 橡胶弹性各向同性网络模型的应力-应变关系分析
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy Pub Date : 2000-01-01 DOI: 10.1016/S1287-4620(00)88409-4
Gilles Perrin
{"title":"Analytic stress-strain relationship for isotropic network model of rubber elasticity","authors":"Gilles Perrin","doi":"10.1016/S1287-4620(00)88409-4","DOIUrl":"10.1016/S1287-4620(00)88409-4","url":null,"abstract":"<div><p>James and Guth [3] have used the inverse Langevin function-based expression of tension in a polymer chain to build the so-called 3-chain model of uncompressible rubber elasticity. It is an analytical model, but it is not isotropic. If one considers an isotropic superposition of an infinite number of chains in all the directions, one obtains an isotropic model, but it is no more tractable analytically. Following Cohen [12], we propose to replace the inverse Langevin function by its Padé approximant, the two functions being very close. The isotropic model is then analytically integrable, and yields large strain strain-stress relationship.</p></div>","PeriodicalId":100303,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy","volume":"328 1","pages":"Pages 5-10"},"PeriodicalIF":0.0,"publicationDate":"2000-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1287-4620(00)88409-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75614032","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 23
Une méthode de simulation d'écoulements diphasiques sans reconstruction d'interfaces 一种不重建界面的两相流动模拟方法
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy Pub Date : 2000-01-01 DOI: 10.1016/S1287-4620(00)88412-4
Adlène Benkenida, Jacques Magnaudet
{"title":"Une méthode de simulation d'écoulements diphasiques sans reconstruction d'interfaces","authors":"Adlène Benkenida,&nbsp;Jacques Magnaudet","doi":"10.1016/S1287-4620(00)88412-4","DOIUrl":"https://doi.org/10.1016/S1287-4620(00)88412-4","url":null,"abstract":"<div><p>We develop a technique for computing incompressible two-phase flows on a fixed grid without using any interface reconstruction procedure. We discuss the grounds, the motivations and the advantages of such an approach and we present several tests of validation, especially concerning the constitutive law for the viscosity. We finally show that the method is able to reproduce the essential features of the flow induced by the rise of a Taylor bubble in a vertical tube.</p></div>","PeriodicalId":100303,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy","volume":"328 1","pages":"Pages 25-32"},"PeriodicalIF":0.0,"publicationDate":"2000-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1287-4620(00)88412-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91759850","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 22
Matrix crack deflection at an interface between a stiff matrix and a soft inclusion 在硬基体和软夹杂之间的界面处的基体裂纹挠度
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy Pub Date : 2000-01-01 DOI: 10.1016/S1287-4620(00)88411-2
Dominique Leguillon , Cécile Lacroix , Éric Martin
{"title":"Matrix crack deflection at an interface between a stiff matrix and a soft inclusion","authors":"Dominique Leguillon ,&nbsp;Cécile Lacroix ,&nbsp;Éric Martin","doi":"10.1016/S1287-4620(00)88411-2","DOIUrl":"https://doi.org/10.1016/S1287-4620(00)88411-2","url":null,"abstract":"<div><p>Matrix crack deflection by an interface increases the apparent toughness of a composite. Criteria developed to predict such a mechanism never gave a complete and satisfying answer. They require additional assumptions on a characteristic fracture length and are sensitive to these choices. The criterion proposed here is based on the maximum total energy decrease, it is independent of any length and is well-suited to study a stiff matrix crack impinging on a soft inclusion.</p></div>","PeriodicalId":100303,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy","volume":"328 1","pages":"Pages 19-24"},"PeriodicalIF":0.0,"publicationDate":"2000-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1287-4620(00)88411-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91759863","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 14
Ondes variqueuses absolument instables dans un canal élastique 弹性管中绝对不稳定的静脉曲张波
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy Pub Date : 2000-01-01 DOI: 10.1016/S1287-4620(00)88417-3
Emmanuel de Langre
{"title":"Ondes variqueuses absolument instables dans un canal élastique","authors":"Emmanuel de Langre","doi":"10.1016/S1287-4620(00)88417-3","DOIUrl":"https://doi.org/10.1016/S1287-4620(00)88417-3","url":null,"abstract":"<div><p>Conditions for absolute instability of the elastic walls of a plane channel with potential flow are investigated. The absolute instability threshold is given in closed form in the thin film approximation for walls made of plates or membranes. The more general case is solved numerically and is compared with more classical results for a single wall in the presence of a semi-infinite fluid domain. It is found that absolute instability is strongly influenced by the membrane or plate nature of the wall stiffness.</p></div>","PeriodicalId":100303,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy","volume":"328 1","pages":"Pages 61-65"},"PeriodicalIF":0.0,"publicationDate":"2000-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1287-4620(00)88417-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90126392","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Des régularités très significatives dans les observations interférométriques de Dayton C. Miller 1925–1926 代顿·c·米勒1925 - 1926年干涉观测中非常重要的规律
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy Pub Date : 1999-12-01 DOI: 10.1016/S1287-4620(00)87512-2
Maurice Allais
{"title":"Des régularités très significatives dans les observations interférométriques de Dayton C. Miller 1925–1926","authors":"Maurice Allais","doi":"10.1016/S1287-4620(00)87512-2","DOIUrl":"10.1016/S1287-4620(00)87512-2","url":null,"abstract":"<div><p>The analysis of the hodographs corresponding to the interferometric observations of Dayton C. Miller 1925–1926 demonstrates the existence of a very marked coherence underlying these observations, quite unexplainable by perverse effects (e.g. temperature).</p></div>","PeriodicalId":100303,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy","volume":"327 14","pages":"Pages 1405-1410"},"PeriodicalIF":0.0,"publicationDate":"1999-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1287-4620(00)87512-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75305529","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Conductivité hydraulique et progression du front de dessiccation dans une argilite 粘土中的水力传导率和干燥前沿的进展
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy Pub Date : 1999-12-01 DOI: 10.1016/S1287-4620(00)87504-3
Farimah Masrouri, Lee Yong Guy Rakotondratsima, Jean-Paul Tisot
{"title":"Conductivité hydraulique et progression du front de dessiccation dans une argilite","authors":"Farimah Masrouri,&nbsp;Lee Yong Guy Rakotondratsima,&nbsp;Jean-Paul Tisot","doi":"10.1016/S1287-4620(00)87504-3","DOIUrl":"10.1016/S1287-4620(00)87504-3","url":null,"abstract":"<div><p>The “Schistes carton” formation is highly overconsolidated and hardened in its intact form. The variations of hydraulic and/or mechanical stresses on this material lead to an alteration as well as a change in its mechanical properties. Experiments have been carried out to study the advancement of the desiccation front and the hydraulic conductivity of this unsaturated soil. The samples are from Pont-à-Mousson Lorraine. The evolution of the volumetric water content versus the depth and the variations of the hydraulic conductivity have permitted the estimation of the alteration depth in this formation.</p></div>","PeriodicalId":100303,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy","volume":"327 14","pages":"Pages 1355-1361"},"PeriodicalIF":0.0,"publicationDate":"1999-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1287-4620(00)87504-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79427941","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Étude analytique de la viscosité turbulente à l'aide du modèle K-L 用K-L模型分析湍流粘度
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy Pub Date : 1999-12-01 DOI: 10.1016/S1287-4620(00)87506-7
Cristèle Chevalier , André Temperville
{"title":"Étude analytique de la viscosité turbulente à l'aide du modèle K-L","authors":"Cristèle Chevalier ,&nbsp;André Temperville","doi":"10.1016/S1287-4620(00)87506-7","DOIUrl":"https://doi.org/10.1016/S1287-4620(00)87506-7","url":null,"abstract":"<div><p>From the K-L turbulence model proposed by Lewellen [1], an analytical expression of turbulence macroscale is established. This expression, obtained with the hypothesis of a null horizontal pressure gradient, can be used for inertial or Couette flow. This formulation is better than the classical linear expression and, moreover, this analytical computation and numerical computations are in a good agreement.</p></div>","PeriodicalId":100303,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy","volume":"327 14","pages":"Pages 1371-1374"},"PeriodicalIF":0.0,"publicationDate":"1999-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1287-4620(00)87506-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"92064089","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Un bicristal mince déformé sous l'effet d'un réseau bipériodique de dislocations de misfit 在双周期错配位网络作用下变形的薄双晶状体
Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy Pub Date : 1999-12-01 DOI: 10.1016/S1287-4620(99)90010-8
Roland Bonnet
{"title":"Un bicristal mince déformé sous l'effet d'un réseau bipériodique de dislocations de misfit","authors":"Roland Bonnet","doi":"10.1016/S1287-4620(99)90010-8","DOIUrl":"10.1016/S1287-4620(99)90010-8","url":null,"abstract":"<div><p>The elastic field of a planar two-period network of misfit dislocations parallel to the two free surfaces of a thin bimaterial is explicitly determined from the assumption of an isotropic elasticity for each crystal. A few calculations of normal stresses enable the elastic field relaxation to be illustrated for CoSi<sub>2</sub>/Si(111).</p></div>","PeriodicalId":100303,"journal":{"name":"Comptes Rendus de l'Académie des Sciences - Series IIB - Mechanics-Physics-Astronomy","volume":"327 13","pages":"Pages 1331-1336"},"PeriodicalIF":0.0,"publicationDate":"1999-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1287-4620(99)90010-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83235313","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
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