Relevant bibliographies by topics / Stabilité de versant

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Stabilité de versant'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Stabilité de versant"

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Quinty, François, and Louise Filion. "Décrochements pelliculaires et gélifluxion en nappe sur le versant nord des drumlins, région du lac Minto, Québec subarctique." Géographie physique et Quaternaire 43, no. 1 (2007): 51–64. http://dx.doi.org/10.7202/032753ar.

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RÉSUMÉ L'examen des photographies aériennes à l'échelle de 1/40 000 d'un secteur s'étendant à l'est de la baie d'Hudson, entre le 56° et le 58° de latitude nord, soit dans la région du lac Minto, a révélé l'existence de phénomènes d'érosion par des mouvements de masse sur le versant nord des drumlins. La description des formes d'érosion sur le terrain et l'étude des sols et des paléosols ont permis de distinguer deux processus responsables de l'évolution du versant d'un drumlin, soit les décrochements pelliculaires et la gélifluxion en nappe. Les premiers sont des mouvements rapides qui laisse
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Magnan, J. P., A. Abdul Baki, and P. Pouget. "Analyse probabiliste de la stabilité de deux remblais édifiés sur versant instable." Revue Française de Géotechnique, no. 69 (1994): 3–10. http://dx.doi.org/10.1051/geotech/1994069003.

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Hétu, Bernard, and James T. Gray. "Évolution postglaciaire des versants de la région de Mont-Louis, Gaspésie, Québec." Géographie physique et Quaternaire 34, no. 2 (2011): 187–208. http://dx.doi.org/10.7202/1000397ar.

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La géomorphologie climatique classique a fait de l’écosystème forestier tempéré l’un des moins agressifs qui soit. La présence d’une couverture forestière fermée éliminerait toute possibilité d’érosion autre que chimique. Des découvertes récentes effectuées au Québec remettent en cause cette idée de stabilité morphogénétique en forêt tempérée. Dans la région de Mont-Louis (Gaspésie), des cônes de déjection et des éboulis amorphes ou stratifiés, formes et dépôts qui auraient pu être interprétés en terme de paléoclimat périglaciaire, se sont constitués, de façon métachrone, durant toute la pério
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Cheggour, Aouatif, Vincent Simonneaux, Samia Asma, et al. "Recherche d’indicateurs de ruissellement et des risques d’érosion au moyen de tests d’infiltrométrie dans le bassin versant du Rhéraya (Haut-Atlas occidental, Maroc)." Revue des sciences de l'eau 21, no. 3 (2008): 311–22. http://dx.doi.org/10.7202/018777ar.

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Résumé L’objectif de ce travail est d’étudier les risques de ruissellement et d’érosion dans le bassin versant du Rhéraya (Haut-Atlas du Maroc) au moyen d’un irrigateur manuel à rampe sur 1 m2. Nous recherchons des indicateurs faciles à déterminer directement sur le terrain (états de surface du sol) ou à partir des tests en laboratoire (stabilité des agrégats, texture, matière organique), qui soient bien corrélés avec l’infiltrabilité et la turbidité issues des tests d’infiltrométrie. Pour les différents sols affleurant dans le bassin, les résultats ont mis en évidence une grande variabilité d
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Hétu, Bernard, and James T. Gray. "Les étapes de la déglaciation dans le nord de la Gaspésie (Québec) : les marges glaciaires des dryas ancien et récent." Géographie physique et Quaternaire 54, no. 1 (2002): 5–40. http://dx.doi.org/10.7202/004831ar.

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Résumé Une cartographie morphosédimentologique des vallées comprises entre Cap-au-Renard et Petite-Vallée, complétée par des levés stratigraphiques et plusieurs datations au 14 C et au SMA inédites, ont permis de reconstituer en détail les étapes de la déglaciation wisconsinienne dans le nord de la Gaspésie. Durant le pléniglaciaire wisconsinien, la partie orientale de la Gaspésie était occupée par une calotte glaciaire régionale à écoulement radial. La déglaciation s'amorce le long du littoral peu avant 13 300 BP. Elle reste lente jusqu'à l'intervalle allant de 12 300 BP à 11 800 BP, alors qu
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Lledo, P. M. "Affect, mémoire et neurogenèse chez l’adulte." European Psychiatry 28, S2 (2013): 11. http://dx.doi.org/10.1016/j.eurpsy.2013.09.025.

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Les avancées récentes en neurobiologie ont quelque peu modifié l’idée d’une relative stabilité des composants structuraux du cerveau mature. Chez les mammifères, on découvre aujourd’hui que des milliers de nouvelles cellules nerveuses apparaissent chaque jour dans le cerveau adulte. Cette neurogenèse, qualifiée de secondaire par opposition à la production neuronale de l’embryon, contribue aux changements structuraux et fonctionnels de certains circuits cérébraux. L’existence de cette forme extrême de neuroplasticité prouve que les capacités d’adaptation du système nerveux ne se limitent pas au
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Scrinzi, G., E. Gregori, F. Giannetti, et al. "An evaluation model of protective function in forest management planning: slope stability in regard to shallow landslide events." Forest@ - Rivista di Selvicoltura ed Ecologia Forestale 3, no. 1 (2006): 98–155. http://dx.doi.org/10.3832/efor0349-0030098.

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Sherman, Tami Irwin, Jay Greenspan, Nancy St. Clair, Suzanne Touch, and Thomas Shaffer. "Optimizing the Neonatal Thermal Environment." Neonatal Network 25, no. 4 (2006): 251–60. http://dx.doi.org/10.1891/0730-0832.25.4.251.

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Devices used to maintain thermal stability in preterm infants have advanced over time from the first incubator reported by Jean-Louis-Paul Denuce in 1857 to the latest Versalet Incuwarmer and Giraffe Omnibed devices today. Optimizing the thermal environment has proven significant for improving the chances of survival for small infants. Understanding the basic physiologic principles and current methodology of thermoregulation is important in the clinical care of these tiny infants. This article highlights principles of thermoregulation and the technologic advances that provide thermal support t
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Vengeon, Jean-Marc, André Giraud, Pierre Antoine, and Louis Rochet. "Contribution à l'analyse de la déformation et de la rupture des grands versants rocheux en terrain cristallophyllien." Canadian Geotechnical Journal 36, no. 6 (1999): 1123–36. http://dx.doi.org/10.1139/t99-066.

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In mountainous regions, the study of the stability of rock slopes is of major importance for land management and safety of populations. The monitoring of several unstable alpine slopes has shown the existence of continuous movements with periods of acceleration, but the interpretation of these measurements is still difficult and makes any longer time prediction very uncertain. Three unstable slopes in the Alps, chosen in foliated metamorphic rocks are presented to illustrate the different deformation mechanisms that can be encountered. In particular, we present an analysis of the slope movemen
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Sharma, Abhishek K., Manish K. Khandelwal, and P. Bera. "Finite amplitude analysis of non-isothermal parallel flow in a vertical channel filled with a highly permeable porous medium." Journal of Fluid Mechanics 857 (October 22, 2018): 469–507. http://dx.doi.org/10.1017/jfm.2018.745.

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This paper addresses the finite amplitude instability of stably stratified non-isothermal parallel flow in a vertical channel filled with a highly permeable porous medium. A cubic Landau equation is derived to study the limiting value of growth of instabilities under nonlinear effects. The non-Darcy model is considered to describe the flow instabilities in a porous medium. The nonlinear results are presented for air as well as water. The analysis is carried out in the vicinity of as well as away from the critical point (bifurcation point). It is found that when the medium is saturated by water
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Dissertations / Theses on the topic "Stabilité de versant"

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Nadeau, Kenny. "Détermination de la stabilité cinétique des complexes uranium-substances humiques dans le bassin versant du fleuve St-Laurent." Master's thesis, Université Laval, 2014. http://hdl.handle.net/20.500.11794/25511.

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Le bassin versant du St-Laurent (BVSL), constitué des Grands Lacs et du fleuve Saint-Laurent, est un écosystème d’eau douce unique puisqu’il est le seul dans le monde à avoir accueilli tous les stades du cycle du combustible nucléaire. La présence d’activités nucléaires sur les rives de l’écosystème nécessite une connaissance approfondie du comportement environnemental des radionucléides. Comme la plupart des actinides ont une origine anthropique, ils vont se comporter selon des paramètres thermodynamiques qui peuvent être estimés selon divers modèles. Le cas des TENORM (matériaux présentant u
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Bourdeau, Céline. "Effets de site et mouvements de versant en zones sismiques : apport de la modélisation numérique." Phd thesis, École Nationale Supérieure des Mines de Paris, 2005. http://pastel.archives-ouvertes.fr/pastel-00001480.

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Dans ce travail on cherche à définir , par la modélisation numérique (logiciel FLAC), les causes à l'origine du déclenchement des mouvements de versant sous sollicitations dynamiques. Plus particulièrement, on s'intéresse aux corrélations entre la distribution des mouvements sismiques au sein des versants ( effet de site) et, le déclenchement et les caractéristiques des mouvements de versant. Les analyses paramétriques d'effets de site et de stabilité des pentes réalisées sur des modèles élémentaires ont montré que, lorsque l'accélération maximale du signal sismique incident est faible, les ve
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Hadadou, Rafik. "Contribution à la mise au point d'une méthodologie de contrôle de stabilité des talus d'une grande mine à ciel ouvert : application à la mine de Carmaux (Tarn)." Vandoeuvre-les-Nancy, INPL, 1993. http://docnum.univ-lorraine.fr/public/INPL_T_1993_HADADOU_R.pdf.

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Les talus des exploitations minières à ciel ouvert, doivent après leur dimensionnement et leur réalisation, être surveillés. Ce travail contribue à la mise au point de ces opérations de contrôle et définit ce que devrait être un suivi géotechnique d'une mine à ciel ouvert au cours de son creusement. Une base de données d'informations géologiques sur le terrain a été constituée. Ces informations ont été analysées en vue de détecter d'éventuelles instabilités. Une grande partie de ces dernières étaient liées à la présence d'anciens travaux exploités en souterrain. Il s'agit alors de gérer au mie
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Quéméneur, Philippe. "Caractérisation géotechnique en zone d"offshore" profond et analyse régionale de la stabilité des pentes : application à quelques secteurs de la pente continentale du golfe de Guinée." Vandoeuvre-les-Nancy, INPL, 1996. http://www.theses.fr/1996INPL073N.

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Deux campagnes océanographiques ont été réalisées en 1992 et 1993 par Ifremer and Elf Aquitaine Production, dans le golfe de Guinée, avec des prélèvements de carottes küllenberg et l'acquisition de données géophysiques par grandes profondeurs d'eau. Les essais géotechniques, réalisés au laboratoire de géotechnique de l'E. N. S. G. , ont permis une description synthétique des sédiments superficiels sur les talus continentaux du Nigeria, du Gabon et du Congo. Sur la pente continentale du Gabon, ces résultats mettent en évidence un état sous-consolidé en profondeur. Les relevés géophysiques y ind
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Porokhovoï, Evgueni. "Stabilité à long terme des talus de mines à ciel ouvert dans les massifs de roches basiques et ultrabasiques." Phd thesis, Ecole Nationale des Ponts et Chaussées, 1995. http://tel.archives-ouvertes.fr/tel-00529344.

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Le présent travail est consacré aux problèmes de l'altération de roches basiques et ultrabasiques sous des conditions climatiques différentes et à l'influence de ces processus sur la stabilité à long terme des talus de mines à ciel ouvert. Les roches font partie d'anciens profils d'altération et, mises à jour par l'exploitation, subissent des altérations météoriques modernes qui changent les paramètres pétrographiques et géotechniques les caractérisant, ceci au niveau de la matrice rocheuse et du massif rocheux. Deux objets ont été étudiés au cours de ce travail : la mine de chromite de Bemane
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Aigle, Pascal. "Stabilisation des talus de déblai par les techniques de drainage - simulation numérique des écoulements tridimentionnels à surface libre - Évaluation de l'augmentation de stabilité par méthode tridimensionnelle à la rupture." Nancy 1, 1989. http://www.theses.fr/1989NAN10037.

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Le but de ce travail est d'analyser les effets du drainage comme moyen de stabilisation des pentes naturelles et artificielles. On propose une méthodologie en deux phases : premièrement, reconstitution par simulation numérique des écoulements tridimensionnels à surface libre créés par les systèmes confortatifs classiques ; puis, calcul de l'équilibre du talus en tenant compte du champ complet des potentiels. L'analyse en rupture circulaire est utilisée à 2 et à 3 dimensions. Des calculs systématiques montrent qu'entre deux ouvrages drainants successifs, le coefficient de sécurité minimum est o
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Garnier, Denis. "Analyse par la théorie du calcul à la rupture des facteurs de réduction de la capacité portante de fondations superficielles." Phd thesis, Ecole Nationale des Ponts et Chaussées, 1995. http://tel.archives-ouvertes.fr/tel-00529455.

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Si le problème de la capacité portante d'une fondation superficielle posée sur un massif plan semi-infini est aujourd'hui bien maîtrisé, il n'en est plus de même dès que l'on s'éloigne de cette configuration de référence. Ce travail s'attache donc à étudier à l'aide de la théorie du calcul à la rupture, la réduction de la capacité portante de la fondation superficielle soumise à différents modes de chargement, due notamment à la proximité d'une pente ou une excavation. L'étude est abordée dans un premier temps, dans le cadre d'une approche bidimensionnelle du problème (cas de la semelle filant
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Toffolini, Philippe. "Stabilisation des pentes naturelles par les techniques de drainage : Étude géologique et hydrogéologique du site de Chateau-sous-Clevant (Meurthe-et-Moselle) ; Essai de synthèse méthodologique." Nancy 1, 1989. http://www.theses.fr/1989NAN10259.

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Lors de la construction de l'autoroute A31 (Nancy-Metz) d'importants travaux de drainage furent exécutés au droit du lieu-dit Chateau-sous-Clevant (Meurthe-et-Moselle) pour assurer la stabilité du remblai autoroutier construit sur un versant instable. Ce mémoire présente une nouvelle étude du site, entreprise afin de définir ce que pourrait être, aujourd'hui, une méthodologie adaptée à ce type de problèmes. Il est proposé une étude géologique et structurale à grande échelle, une étude de la piézométrie reposant sur l'analyse de mesures anciennes ainsi que sur un suivi des variations du champ d
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Meftah, Khaled. "Mécanique des sols anisotropes : caractérisation de l'anisotropie des sols et prise en compte dans le calcul des ouvrages." Paris 6, 1988. http://www.theses.fr/1988PA066413.

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Ce rapport comprend quatre parties: la premiere partie consiste en une description detaillee de l'origine et des formes de l'anisotropie des sols; une place importante est accordee a la mise en evidence et la caracterisation de l'anisotropie de la cohesion non drainee des argiles; la seconde partie decrit les principes des modeles elastiques lineaires aelotropes et passe en revue les methodes de determination des parametres d'elasticite aelotrope et leurs valeurs disponibles dans la litterature, pour les sables et pour les argiles; dans la troisieme partie, apres une revue des solutions publie
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Nguyen, Hieu Toan. "Évaluation des effets de site topographiques dans les pentes soumises à des sollicitations dynamiques par simulations numériques." Thesis, Paris, ENMP, 2015. http://www.theses.fr/2015ENMP0074/document.

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Les séismes sont connus comme des catastrophes naturelles destructrices et meurtrières. Particulièrement dans les régions montagneuses, les effets des séismes sont encore beaucoup plus aggravés à cause des effets de site topographiques. La présence d'une pente est à l'origine d'une amplification du signal sismique notamment dans le voisinage de la crête. De nombreux séismes anciens tels que le séisme de Lambesc (1909, Ms=6.2) qui a conduit à la destruction du village de Rognes (Bouches-du-Rhône, France), ou plus récemment le séisme d'Athènes en Grèce (1999, Ms=5.9) qui a endommagé la ville d'A
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Books on the topic "Stabilité de versant"

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Ciclo di Conferenze di Meccanica e Ingegneria delle Rocce (11th 2006 Turin, Italy). Instabilita di versante interazioni le infranstrutture i centri abitati e l'ambiente: Torino 28-29 Novembre 2006. Patron Editore, 2006.

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Button, Tim, and Sean Walsh. Types and Stone spaces. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198790396.003.0014.

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Types are one of the cornerstones of contemporary model theory. Simply put, a type is the collection of formulas satisfied by an element of some elementary extension. The types can be organised in an algebraic structure known as a Lindenbaum algebra. But the contemporary study of types also treats them as the points of a certain kind of topological space. These spaces, called ‘Stone spaces’, illustrate the richness of moving back-and-forth between algebraic and topological perspectives. Further, one of the most central notions of contemporary model theory—namely stability—is simply a constrain
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Book chapters on the topic "Stabilité de versant"

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Boutellier, Hans. "Social order in a network society." In A Criminology of Moral Order. Policy Press, 2019. http://dx.doi.org/10.1332/policypress/9781529203752.003.0002.

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This chapter first looks at the information age and its networking mindset. It then examines three tenets from the study of complex systems: structure, synchrony, and stability. It describes the concept of ‘improvising society’, which refers to new social forms of processing alignment and fine-tuning. In both tightly structured and more fluid compositions, arrangements and spontaneous play produce a kaleidoscopic image of networks, clusters and subcultures. The improvising society reflects the new institutional relations. Institutions develop on the basis of tradition and renewal, and give society stability. The alignment of one actor (person, organization) with another actor, and vice versa, ad infinitum, is the ordering process of the current network society.
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Balla, Vamsi Krishna, Mitun Das, Someswar Datta, and Biswanath Kundu. "Articulating Biomaterials." In Biomedical Engineering. IGI Global, 2018. http://dx.doi.org/10.4018/978-1-5225-3158-6.ch038.

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This chapter examines the importance of surface characteristics such as microstructure, composition, crystallographic texture, and surface free energy in achieving desired biocompatibility and tribological properties thereby improving in vivo life of artificial articulating implants. Current implants often fail prematurely due to inadequate mechanical, tribological, biocompatibility, and osseointegration properties, apart from issues related to design and surgical procedures. For long-term in vivo stability, artificial implants intended for articulating joint replacement must exhibit long-term stable articulation surface without stimulating undesirable in vivo effects. Since the implant's surface plays a vital and decisive role in their response to biological environment, and vice versa, surface modification of implants assumes a significant importance. Therefore, overview on important surface modification techniques, their capabilities, properties of modified surfaces/implants are presented in the chapter. The clinical performance of surface modified implants and new surfaces for potential next-generation articulating implant applications are discussed at the end.
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Balla, Vamsi Krishna, Mitun Das, Someswar Datta, and Biswanath Kundu. "Articulating Biomaterials." In Processing Techniques and Tribological Behavior of Composite Materials. IGI Global, 2015. http://dx.doi.org/10.4018/978-1-4666-7530-8.ch009.

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This chapter examines the importance of surface characteristics such as microstructure, composition, crystallographic texture, and surface free energy in achieving desired biocompatibility and tribological properties thereby improving in vivo life of artificial articulating implants. Current implants often fail prematurely due to inadequate mechanical, tribological, biocompatibility, and osseointegration properties, apart from issues related to design and surgical procedures. For long-term in vivo stability, artificial implants intended for articulating joint replacement must exhibit long-term stable articulation surface without stimulating undesirable in vivo effects. Since the implant's surface plays a vital and decisive role in their response to biological environment, and vice versa, surface modification of implants assumes a significant importance. Therefore, overview on important surface modification techniques, their capabilities, properties of modified surfaces/implants are presented in the chapter. The clinical performance of surface modified implants and new surfaces for potential next-generation articulating implant applications are discussed at the end.
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Kanagasabai, Lenin. "Enhanced Symbiotic Organisms Search and Hydrological Cycle Algorithms for Real Power Loss Diminution and Voltage Stability Enhancement." In Advances in Environmental Engineering and Green Technologies. IGI Global, 2022. http://dx.doi.org/10.4018/978-1-7998-7447-8.ch007.

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In this chapter, enhanced symbiotic organisms search (ESOS) algorithm and hydrological cycle (HC) algorithm are projected to solve factual power loss lessening problem. Symbiotic search algorithm is based on the actions between two different organisms in the ecosystem: mutualism, commensalism, and parasitism. Exploration procedure has been initiated arbitrarily, and each organism indicates a solution with fitness value. Quasi-oppositional-based learning and chaotic local search have been applied to augment the performance of the algorithm. In this work, hydrological cycle (HC) algorithm has been utilized to solve the optimal reactive power problem. It imitates the circulation of water form land to sky and vice versa. Only definite number of water droplets is chosen for evaporation, and it is done through roulette-wheel selection method. In the condensation stage, water drops move closer, combine, and also collusion occurs as the temperature decreases.
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Deathridge, John. "The Invention of German Music, c. 1800." In Unity and Diversity in European Culture c.1800. British Academy, 2006. http://dx.doi.org/10.5871/bacad/9780197263822.003.0004.

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Arnold Schoenberg once spoke famously of his invention of ‘the method of composition with twelve tones related only to one another’, as the discovery of ‘something which will assure the supremacy of German music for the next hundred years’. How did the generally inclusive habits of composers in German-speaking countries in the eighteenth century, who did not hesitate to adopt diverse musical styles from other countries in Europe, turn into something called German music in the nineteenth century that was decidedly exclusive? And who were its inventors? This chapter argues that German music took its bearings from non-German countries in a spirit of assimilation or opposition — and vice versa. Public ritual and predictable cycles most memorably marked by German music began in Germany in the nineteenth century with the inauguration of the annual Lower Rhine Music Festivals founded in the late 1810s. The marked suitability of German music to do cultural work in the name of the past in order to stabilise uncertain life in the present is not without precedent in Britain too.
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Lovejoy, Shaun. "Macroweather, the climate, and beyond." In Weather, Macroweather, and the Climate. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780190864217.003.0009.

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“Expect the cold weather to continue for the next ten days, followed by a warm spell.” This might have been the fourteen- day weather forecast for Montreal on December, 31, 2006 (Fig. 5.1, top). But imagine what it might have been if Earth rotated about its axis ten times more slowly, so that the length of the day coincided with the ten- day weather– macroweather transition scale— an alignment of scales almost achieved on Mars. In that case (Fig. 5.1, bottom) we would have heard, “Expect mild weather on Monday, followed by freezing temperatures, until a warm spell on Thursday, followed by a brisk Friday and Saturday, a warming on Sunday and Monday, followed by freezing on Tuesday, then a four- day warm period followed by freezing and then warming.” Although long- term trends in weather can persist for up to ten days or so, in macroweather, the upshifts tend to be followed immediately by downshifts (and vice versa) and, although longer term trends exist, they are much more subtle, resulting from imperfect cancelations of successive fluctuations. The tendency of macroweather fluctuations to cancel rather than to accu­mulate is its defining feature, and cancelation is synonymous with stability. Quantitatively, it implies that the temporal fluctuation exponent H is negative. In the weather regime with positive H, the temperature, wind, and other variables wander up and down with prolonged swings. The weather is a meta­phor for instability. If we average macroweather over longer and longer times, its variability is reduced systematically so that it appears to converge to a well-defined value. In that sense, macroweather is what you expect, the weather is what you get. But what about macroweather’s spatial properties? As usual, forecasts can be explained with recourse to maps. For example, Plate 5.1 (left) shows the day- to-day evolution of the daily temperatures corresponding to the forecast in Figure 5.1 (top).
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Conference papers on the topic "Stabilité de versant"

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Faini, A., and Raffaello Giannini. "Progetto di ricerca: relazione tra gestione selvicolturale dei boschi e stabilità dei versanti." In Terzo Congresso Nazionale di Selvicoltura. Accademia Italiana di Scienze Forestali, 2009. http://dx.doi.org/10.4129/cns2008.069.

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Mozuras, Almantas, and Evgueni Podzharov. "Displacement Measurement, Nonlinearity, Noise, and Thermal Stability." In ASME 2003 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/detc2003/vib-48599.

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Nonlinear distortions, noise, and thermal instability are the most important error sources of non-contact displacement and distance measurement. In this work, the ways of elimination of these errors are considered. Two methods are proposed and analyzed. The first method helps to exclude nonlinear distortions and noise. According to this method, the nonlinear converter is driven to harmonic oscillations orthogonally to the object surface with constant amplitude. Fourier coefficients are calculated for the different node positions of the vibrating converter. Calibration curve of the converter is
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Abootorabi Zarchi, Mohammad Mahdi, Hamed Zoghi, and Mohammad Reza Razfar. "Analytical Investigation of Chatter and Its Effective Parameters in Milling, Using Modal Experiment." In ASME 2010 10th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2010. http://dx.doi.org/10.1115/esda2010-24765.

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Chatter is modeled in milling using the planar vibratory equations of the tool. To solve these equations, dynamic parameters of the tool, e.g. natural frequency, damping ratio and stiffness must be known. To obtain these parameters modal experiment is carried out and the results are analyzed. The results show that, increasing the cutting speed, the system changes its behavior from stable to unstable and vice versa frequently, which is shown in a diagram known as stability lobes. The increase in stiffness of the tool and reduction in radial engagement of the tool and the workpiece, increase the
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Alfattani, Rami, and Craig Lusk. "Shape-Morphing Using Bistable Triangles With Dwell-Enhanced Stability." In ASME 2018 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/detc2018-86235.

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This paper presents a new design concept for a morphing triangle-shaped compliant mechanism. The novel design is a bistable mechanism that has one changeable side. These morphing triangles may be arrayed to create shapemorphing structures. The mechanism was based on a six-bar dwell mechanism that can fit in a triangle shape and has stable positions at the motion-limit (dead-center) positions. An example of the triangle-shaped compliant mechanism was designed and prototyped: an isosceles triangle with a vertex that changes from 120 degrees to 90 degrees and vice versa. Three of these in the 120
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Rahnama, Ramin, Mozhdeh Sajjadi, and Simon S. Park. "Chatter Stability in Micro Milling Processes Considering Ploughing and Process Damping Effects." In ASME 2009 International Manufacturing Science and Engineering Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/msec2009-84039.

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Micro milling operations utilize miniature tools to remove workpiece material, in order to create the desired 3D miniature components. One of the challenges in a micro milling operation is the unstable phenomenon called regenerative chatter. The occurrence of chatter in the micro domain, as in macro machining, is detrimental to part finishes and significantly reduces the longevity of tools. There are two different cutting mechanisms in micro milling operations, which are determined by the critical chip thickness. When the chip thickness is less than the critical chip thickness, no chip forms a
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Katta, Viswanath R., James W. Blust, Theodore F. Williams, and Charles R. Martel. "Effects of Buoyancy on Heat Transfer and Oxygen Consumption in Fuel-Thermal-Stability Studies." In ASME 1994 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1994. http://dx.doi.org/10.1115/94-gt-262.

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A unique methodology is used to investigate the effects of gravity on fuel flowing through the small-bore heated tubes that are often used in the study of fuel-thermal-stability characteristics. The copper block that houses the fuel tube (or test section) is located on a swivel, and experiments are conducted for different tube orientations namely; horizontal, vertical with flow from bottom to top and vice versa. Results obtained for different fuel-flow rates and block temperatures are discussed. An axisymmetric, time-dependent numerical model is used to simulate the flow patterns in the test s
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Krüger, Stefan, Hannes Hatecke, Andreas Rinke, and Klaus Tammen. "Analysis of the German Navy Stability Standard BV 1030 With Respect to Operability in Heavy Weather." In ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/omae2014-23390.

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The stability standard of the German Navy — the BV 1030 — was developed in the mid-sixties of the last century in close cooperation with the German Navy Authorities (now BAIINBw) and the University of Hamburg. Other than the stability standards used for commercial shipping, the BV 1030 is based on righting and heeling lever balances for each individual loading condition of each individual ship. Different types of heeling moments have to be assumed in several combinations and they have to be balanced against the righting levers of the ship. Not only the still water stability curve is subject to
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Takahashi, Naohiko, Yohei Magara, Mitsuhiro Narita, and Haruo Miura. "Rotordynamic Evaluation of Centrifugal Compressor Using Electromagnetic Exciter." In ASME 2011 Turbo Expo: Turbine Technical Conference and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/gt2011-45829.

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Since heavier gases exert larger effects on rotordynamic stability, stability evaluation is important in developing or designing high-pressure compressors. To evaluate the rotor stability during operation, an excitation test using a magnetic bearing is the most practical method. In stability analysis, labyrinth seals can produce significant cross-coupling forces, which particularly reduce the damping ratio of the first forward mode. Therefore, forward modes should be distinguished from backward modes in the excitation test. One method that excites only the forward modes, not the backward modes
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Naseradinmousavi, Peiman, Mostafa Bagheri, Miroslav Krstić, and C. Nataraj. "Coupled Chaotic and Hyperchaotic Dynamics of Actuated Butterfly Valves Operating in Series." In ASME 2016 Dynamic Systems and Control Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/dscc2016-9601.

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In this effort, we focus on determining the safe operational domain of a coupled actuator-valve configuration. The so-called “Smart Valves” system has increasingly been used in critical applications and missions including municipal piping networks, oil and gas fields, petrochemical plants, and more importantly, the US Navy ships. A comprehensive dynamic analysis is hence needed to be carried out for capturing dangerous behaviors observed repeatedly in practice. Using some powerful tools of nonlinear dynamic analysis including Lyapunov exponents and Poincaré map, a comprehensive stability map i
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Schlein, B. C., T. G. Fox, and C. J. Puma. "Development of a Dual Fuel Injector for a Gas Turbine Combustor." In ASME 1989 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1989. http://dx.doi.org/10.1115/89-gt-25.

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A dual fuel nozzle has been developed for the FT-8, an industrial version of Pratt and Whitney’s JT8D engine. The nozzle is configured with a natural gas passage wrapped around a liquid air blast nozzle. The paper describes the development of the nozzle in a single can rig in a high pressure facility. A test program was conducted which parametrically varied the swirl angle of the air passage swirlers. Stability, smoke, and exit gas temperature profile data were acquired with Jet A, diesel and methane fuels and used to optimize the design. An optical probe was used to observe starting, blowout
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