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Détail de l'indexation
620.1 : Essais des matériaux. Défauts des matériaux. Protection des matériaux
620 Essais des matériaux. Matériaux commerciaux. Station génératrice d'énergie. Economie de l'énergie
620.1.08 Principes généraux et théorie des mesures et de la construction des instruments de mesure. Procédés de mesurage
620.1/389
620.1/531
620.106
620.106/016
620.106/621.381
620.11 Inspection préalable des matériaux. Pièces d'essais. Echantillonnage
620.11/668.4
620.110 5
620.112
620.13
620.162
620.168 Essais et mesures des matériaux composites
620.17 Mesure des propriétés mécaniques des matériaux. Essais de résistance
620.19 Détection des défauts des matériaux. Méthodes d'éssais. Imperfections, défectuosités, failles, vices. Influences et actions chimiques et physico-chimiques. Corrosion. Erosion
620.193 Influences physiques et chimiques. Corrosion. Résistance aux attaques
620.315
620.8
620.9 Economie de l'énergie en général
620.91 Sources de l'énergie. Sources naturelles d'énergie
620.92 Utilisation des sources d'énergie naturelles. Énergies alternatives
620.92:551.55 Utilisation de l'énergie éolienne
620.95 Utilisation de l'énergie biologique, p. ex. issue de la végétation, des animaux
620/530
620/622
620.1.08 Principes généraux et théorie des mesures et de la construction des instruments de mesure. Procédés de mesurage
620.1/389
620.1/531
620.106
620.106/016
620.106/621.381
620.11 Inspection préalable des matériaux. Pièces d'essais. Echantillonnage
620.11/668.4
620.110 5
620.112
620.13
620.162
620.168 Essais et mesures des matériaux composites
620.17 Mesure des propriétés mécaniques des matériaux. Essais de résistance
620.19 Détection des défauts des matériaux. Méthodes d'éssais. Imperfections, défectuosités, failles, vices. Influences et actions chimiques et physico-chimiques. Corrosion. Erosion
620.193 Influences physiques et chimiques. Corrosion. Résistance aux attaques
620.315
620.8
620.9 Economie de l'énergie en général
620.91 Sources de l'énergie. Sources naturelles d'énergie
620.92 Utilisation des sources d'énergie naturelles. Énergies alternatives
620.92:551.55 Utilisation de l'énergie éolienne
620.95 Utilisation de l'énergie biologique, p. ex. issue de la végétation, des animaux
620/530
620/622
Ouvrages de la bibliothèque en indexation 620.1
Affiner la rechercheValidation of a Source-Receiver Model for Road Traffic-Induced Vibrations in Buildings. II: Receiver Model / Pyl, Lincy in Journal of engineering mechanics, Vol. 130 N°12 (Decembre 2004)
[article]
in Journal of engineering mechanics > Vol. 130 N°12 (Decembre 2004) . - 1394-1406 p.
Titre : Validation of a Source-Receiver Model for Road Traffic-Induced Vibrations in Buildings. II: Receiver Model Titre original : Validation d'un Modèle de Récepteur de Source pour des Vibrations Induites du Trafic de Route dans les Bâtiments. II : Modèle de Récepteur Type de document : texte imprimé Auteurs : Pyl, Lincy, Auteur ; Degrande, Geert, Auteur ; Clouteau, Didier ; Ghanem, Roger G., Editeur scientifique Article en page(s) : 1394-1406 p. Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Vibration Vehicles Traffic Buildings Numerical models Soil-structure interaction Models Véhicules Le trafic Bâtiments Modèles numériques Interaction de Sol-structure Modèles Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : The objective of part II of this paper is to couple the validated source model for free-field traffic-induced vibrations, which has been presented in part I of the paper, to a receiver model that incorporates the structure and accounts for dynamic soil–structure interaction. The incident wave field is applied to the structure and the response is calculated using a subdomain formulation for dynamic soil–structure interaction. A finite element method is applied to the structure, while the unbounded soil domain is calculated with a boundary element method using the Green’s functions of a homogeneous or a layered half-space. The results of elaborate in situ experiments in and around a single family dwelling during the passage of a truck on joints in a concrete pavement and on a plywood unevenness, are used for the validation of the numerical prediction model. The predicted structural response during the passage of a truck at a speed v=50 km/h is compared with the experimental results. The agreement between the numerical and the experimental results is very good for the passage on the plywood unevenness and satisfactory for the passage on the joints between the concrete plates.
L'objectif de la partie II de cet article est de coupler le modèle validé de source pour des vibrations induites par trafic libre de champ, qui a été présenté dans la partie I du papier, à un modèle de récepteur qui incorpore la structure et explique l'interaction dynamique de structure de sol. Le champ de vague d'incident est appliqué à la structure et la réponse est calculée en utilisant une formulation secondaire de domaine pour l'interaction dynamique de structure de sol. Une méthode d'élément fini est appliquée à la structure, alors que le domaine illimité de sol est calculé avec une méthode d'élément de frontière en utilisant les fonctions de Green d'un demi-espace homogène ou posé. Les résultats des expériences in situ raffinées dans et autour d'un logement unifamilial pendant le passage d'un camion sur des joints dans un revêtement bétonné et sur une inégalité de contre-plaqué, sont employés pour la validation du modèle numérique de prévision. La réponse structurale prévue pendant le passage d'un camion à km/h de la vitesse v=50 est comparée aux résultats expérimentaux. L'accord entre les résultats numériques et expérimentaux est très bon pour le passage sur l'inégalité de contre-plaqué et satisfaisant pour le passage sur les joints entre les plats concrets.
DEWEY : 620.1 ISSN : 0733-9399 [article] Validation of a Source-Receiver Model for Road Traffic-Induced Vibrations in Buildings. II: Receiver Model = Validation d'un Modèle de Récepteur de Source pour des Vibrations Induites du Trafic de Route dans les Bâtiments. II : Modèle de Récepteur [texte imprimé] / Pyl, Lincy, Auteur ; Degrande, Geert, Auteur ; Clouteau, Didier ; Ghanem, Roger G., Editeur scientifique . - 1394-1406 p.
Génie Mécanique
Langues : Anglais (eng)
in Journal of engineering mechanics > Vol. 130 N°12 (Decembre 2004) . - 1394-1406 p.
Mots-clés : Vibration Vehicles Traffic Buildings Numerical models Soil-structure interaction Models Véhicules Le trafic Bâtiments Modèles numériques Interaction de Sol-structure Modèles Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : The objective of part II of this paper is to couple the validated source model for free-field traffic-induced vibrations, which has been presented in part I of the paper, to a receiver model that incorporates the structure and accounts for dynamic soil–structure interaction. The incident wave field is applied to the structure and the response is calculated using a subdomain formulation for dynamic soil–structure interaction. A finite element method is applied to the structure, while the unbounded soil domain is calculated with a boundary element method using the Green’s functions of a homogeneous or a layered half-space. The results of elaborate in situ experiments in and around a single family dwelling during the passage of a truck on joints in a concrete pavement and on a plywood unevenness, are used for the validation of the numerical prediction model. The predicted structural response during the passage of a truck at a speed v=50 km/h is compared with the experimental results. The agreement between the numerical and the experimental results is very good for the passage on the plywood unevenness and satisfactory for the passage on the joints between the concrete plates.
L'objectif de la partie II de cet article est de coupler le modèle validé de source pour des vibrations induites par trafic libre de champ, qui a été présenté dans la partie I du papier, à un modèle de récepteur qui incorpore la structure et explique l'interaction dynamique de structure de sol. Le champ de vague d'incident est appliqué à la structure et la réponse est calculée en utilisant une formulation secondaire de domaine pour l'interaction dynamique de structure de sol. Une méthode d'élément fini est appliquée à la structure, alors que le domaine illimité de sol est calculé avec une méthode d'élément de frontière en utilisant les fonctions de Green d'un demi-espace homogène ou posé. Les résultats des expériences in situ raffinées dans et autour d'un logement unifamilial pendant le passage d'un camion sur des joints dans un revêtement bétonné et sur une inégalité de contre-plaqué, sont employés pour la validation du modèle numérique de prévision. La réponse structurale prévue pendant le passage d'un camion à km/h de la vitesse v=50 est comparée aux résultats expérimentaux. L'accord entre les résultats numériques et expérimentaux est très bon pour le passage sur l'inégalité de contre-plaqué et satisfaisant pour le passage sur les joints entre les plats concrets.
DEWEY : 620.1 ISSN : 0733-9399 Validation of the fuel saving potential of downsized and supercharged hybrid pneumatic engines using vehicle emulation experiments / Christian Dönitz in Transactions of the ASME . Journal of engineering for gas turbines and power, Vol. 133 N° 9 (Septembre 2011)
[article]
in Transactions of the ASME . Journal of engineering for gas turbines and power > Vol. 133 N° 9 (Septembre 2011) . - 13 p.
Titre : Validation of the fuel saving potential of downsized and supercharged hybrid pneumatic engines using vehicle emulation experiments Type de document : texte imprimé Auteurs : Christian Dönitz, Auteur ; Christoph Voser, Auteur ; Iulian Vasile, Auteur Année de publication : 2012 Article en page(s) : 13 p. Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Combustion Internal combustion engines Pneumatic systems Road vehicles Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : The pneumatic hybridization of power trains is especially effective when it is combined with strong downsizing and supercharging of spark ignited engines. This paper presents measurement results obtained from such an engine. Specifically, performance measurements for all additional engine modes are shown. The pneumatic motor mode and the pneumatic pump mode are individually optimized over their whole operating range for maximum recuperation efficiency. Jointly with the conventional combustion mode and the pneumatic supercharged mode, they are implemented in one engine control system, thereby enabling the switching between all modes. A dynamometer simulates the longitudinal dynamics of two series production vehicles for the modified engine. This experimental setup, defined as emulation, is used to accurately measure the engine's fuel consumption in the MVEG-95 and federal test procedure (FTP) drive cycles. Causal and noncausal energy management strategies are presented and used for choosing the engine mode during a drive cycle. Fuel savings of up to 35% are measured when comparing the modified engine to the vehicles' standard engines with the same rated power. Hybrid pneumatic vehicles (HPVs) may prove to be a viable alternative to hybrid electric vehicles since fuel savings and driveability are comparable, while the added cost is expected to be substantially lower for HPVs. DEWEY : 620.1 ISSN : 0742-4795 En ligne : http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JETPEZ00013 [...] [article] Validation of the fuel saving potential of downsized and supercharged hybrid pneumatic engines using vehicle emulation experiments [texte imprimé] / Christian Dönitz, Auteur ; Christoph Voser, Auteur ; Iulian Vasile, Auteur . - 2012 . - 13 p.
Génie Mécanique
Langues : Anglais (eng)
in Transactions of the ASME . Journal of engineering for gas turbines and power > Vol. 133 N° 9 (Septembre 2011) . - 13 p.
Mots-clés : Combustion Internal combustion engines Pneumatic systems Road vehicles Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : The pneumatic hybridization of power trains is especially effective when it is combined with strong downsizing and supercharging of spark ignited engines. This paper presents measurement results obtained from such an engine. Specifically, performance measurements for all additional engine modes are shown. The pneumatic motor mode and the pneumatic pump mode are individually optimized over their whole operating range for maximum recuperation efficiency. Jointly with the conventional combustion mode and the pneumatic supercharged mode, they are implemented in one engine control system, thereby enabling the switching between all modes. A dynamometer simulates the longitudinal dynamics of two series production vehicles for the modified engine. This experimental setup, defined as emulation, is used to accurately measure the engine's fuel consumption in the MVEG-95 and federal test procedure (FTP) drive cycles. Causal and noncausal energy management strategies are presented and used for choosing the engine mode during a drive cycle. Fuel savings of up to 35% are measured when comparing the modified engine to the vehicles' standard engines with the same rated power. Hybrid pneumatic vehicles (HPVs) may prove to be a viable alternative to hybrid electric vehicles since fuel savings and driveability are comparable, while the added cost is expected to be substantially lower for HPVs. DEWEY : 620.1 ISSN : 0742-4795 En ligne : http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JETPEZ00013 [...] Vapor phase deposition using a plasma spray process / von Niessen, Konstantin in Transactions of the ASME . Journal of engineering for gas turbines and power, Vol. 133 N° 6 (Juin 2011)
[article]
in Transactions of the ASME . Journal of engineering for gas turbines and power > Vol. 133 N° 6 (Juin 2011) . - 07 p.
Titre : Vapor phase deposition using a plasma spray process Type de document : texte imprimé Auteurs : von Niessen, Konstantin, Auteur ; Gindrat, Malko, Auteur Année de publication : 2011 Article en page(s) : 07 p. Note générale : Tubines à gaz Langues : Anglais (eng) Mots-clés : Crystal microstructure Engines Jets Plasma arc sprayed coatings Plasma deposition Thermal barrier coatings Turbines Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : Plasma spray-physical vapor deposition (PS-PVD) is a low pressure plasma spray technology recently developed by Sulzer Metco AG (Switzerland) to deposit coatings out of the vapor phase. PS-PVD is developed on the basis of the well established low pressure plasma spraying technology. In comparison to conventional vacuum plasma spraying and low pressure plasma spraying, these new processes use a high energy plasma gun operated at a work pressure below 2 mbar. This leads to unconventional plasma jet characteristics, which can be used to obtain specific and unique coatings. An important new feature of PS-PVD is the possibility to deposit a coating not only by melting the feed stock material, which builds up a layer from liquid splats, but also by vaporizing the injected material. Therefore, the PS-PVD process fills the gap between the conventional PVD technologies and standard thermal spray processes. The possibility to vaporize feedstock material and to produce layers out of the vapor phase results in new and unique coating microstructures. The properties of such coatings are superior to those of thermal spray and electron beam-physical vapor deposition (EB-PVD) coatings. In contrast to EB-PVD, PS-PVD incorporates the vaporized coating material into a supersonic plasma plume. Due to the forced gas stream of the plasma jet, complex shaped parts like multi-airfoil turbine vanes can be coated with columnar thermal barrier coatings using PS-PVD. Even shadowed areas and areas, which are not in the line-of-sight to the coating source, can be coated homogeneously. This paper reports on the progress made by Sulzer Metco to develop a thermal spray process to produce coatings out of the vapor phase. Columnar thermal barrier coatings made of yttria stabilized zircona are optimized to serve in a turbine engine. This includes coating properties like strain tolerance and erosion resistance but also the coverage of multiple air foils. DEWEY : 620.1 ISSN : 0742-4795 En ligne : http://asmedl.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JETPEZ00013300 [...] [article] Vapor phase deposition using a plasma spray process [texte imprimé] / von Niessen, Konstantin, Auteur ; Gindrat, Malko, Auteur . - 2011 . - 07 p.
Tubines à gaz
Langues : Anglais (eng)
in Transactions of the ASME . Journal of engineering for gas turbines and power > Vol. 133 N° 6 (Juin 2011) . - 07 p.
Mots-clés : Crystal microstructure Engines Jets Plasma arc sprayed coatings Plasma deposition Thermal barrier coatings Turbines Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : Plasma spray-physical vapor deposition (PS-PVD) is a low pressure plasma spray technology recently developed by Sulzer Metco AG (Switzerland) to deposit coatings out of the vapor phase. PS-PVD is developed on the basis of the well established low pressure plasma spraying technology. In comparison to conventional vacuum plasma spraying and low pressure plasma spraying, these new processes use a high energy plasma gun operated at a work pressure below 2 mbar. This leads to unconventional plasma jet characteristics, which can be used to obtain specific and unique coatings. An important new feature of PS-PVD is the possibility to deposit a coating not only by melting the feed stock material, which builds up a layer from liquid splats, but also by vaporizing the injected material. Therefore, the PS-PVD process fills the gap between the conventional PVD technologies and standard thermal spray processes. The possibility to vaporize feedstock material and to produce layers out of the vapor phase results in new and unique coating microstructures. The properties of such coatings are superior to those of thermal spray and electron beam-physical vapor deposition (EB-PVD) coatings. In contrast to EB-PVD, PS-PVD incorporates the vaporized coating material into a supersonic plasma plume. Due to the forced gas stream of the plasma jet, complex shaped parts like multi-airfoil turbine vanes can be coated with columnar thermal barrier coatings using PS-PVD. Even shadowed areas and areas, which are not in the line-of-sight to the coating source, can be coated homogeneously. This paper reports on the progress made by Sulzer Metco to develop a thermal spray process to produce coatings out of the vapor phase. Columnar thermal barrier coatings made of yttria stabilized zircona are optimized to serve in a turbine engine. This includes coating properties like strain tolerance and erosion resistance but also the coverage of multiple air foils. DEWEY : 620.1 ISSN : 0742-4795 En ligne : http://asmedl.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JETPEZ00013300 [...] Vibration analysis of a nonlinear system with cyclic symmetry / Aurélien Grolet in Transactions of the ASME . Journal of engineering for gas turbines and power, Vol. 133 N° 2 (Fevrier 2011)
[article]
in Transactions of the ASME . Journal of engineering for gas turbines and power > Vol. 133 N° 2 (Fevrier 2011) . - 09 p.
Titre : Vibration analysis of a nonlinear system with cyclic symmetry Type de document : texte imprimé Auteurs : Aurélien Grolet, Auteur ; Fabrice Thouverez, Auteur Année de publication : 2012 Article en page(s) : 09 p. Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Bifurcation Dynamic response Nonlinear differential equations Nonlinear systems Stability Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : This work is devoted to the study of nonlinear dynamics of structures with cyclic symmetry under geometrical nonlinearity using the harmonic balance method (HBM). In order to study the influence of the nonlinearity due to large deflection of blades, a simplified model has been developed. It leads to nonlinear differential equations of the second order, linearly coupled, in which the nonlinearity appears by cubic terms. Periodic solutions in both free and forced cases are sought by the HBM coupled with an arc length continuation and stability analysis. In this study, specific attention has been paid to the evaluation of nonlinear modes and to the influence of excitation on dynamic responses. Indeed, several cases of excitation have been analyzed: punctual one and tuned or detuned low engine order. This paper shows that for a localized, or sufficiently detuned, excitation, several solutions can coexist, some of them being represented by closed curves in the frequency-amplitude domain. Those different kinds of solution meet up when increasing the force amplitude, leading to forced nonlinear localization. As the closed curves are not tied with the basic nonlinear solution, they are easily missed. They were calculated using a sequential continuation with the force amplitude as a parameter. DEWEY : 620.1 ISSN : 0742-4795 En ligne : http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JETPEZ00013 [...] [article] Vibration analysis of a nonlinear system with cyclic symmetry [texte imprimé] / Aurélien Grolet, Auteur ; Fabrice Thouverez, Auteur . - 2012 . - 09 p.
Génie Mécanique
Langues : Anglais (eng)
in Transactions of the ASME . Journal of engineering for gas turbines and power > Vol. 133 N° 2 (Fevrier 2011) . - 09 p.
Mots-clés : Bifurcation Dynamic response Nonlinear differential equations Nonlinear systems Stability Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : This work is devoted to the study of nonlinear dynamics of structures with cyclic symmetry under geometrical nonlinearity using the harmonic balance method (HBM). In order to study the influence of the nonlinearity due to large deflection of blades, a simplified model has been developed. It leads to nonlinear differential equations of the second order, linearly coupled, in which the nonlinearity appears by cubic terms. Periodic solutions in both free and forced cases are sought by the HBM coupled with an arc length continuation and stability analysis. In this study, specific attention has been paid to the evaluation of nonlinear modes and to the influence of excitation on dynamic responses. Indeed, several cases of excitation have been analyzed: punctual one and tuned or detuned low engine order. This paper shows that for a localized, or sufficiently detuned, excitation, several solutions can coexist, some of them being represented by closed curves in the frequency-amplitude domain. Those different kinds of solution meet up when increasing the force amplitude, leading to forced nonlinear localization. As the closed curves are not tied with the basic nonlinear solution, they are easily missed. They were calculated using a sequential continuation with the force amplitude as a parameter. DEWEY : 620.1 ISSN : 0742-4795 En ligne : http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JETPEZ00013 [...] Vibration diagnosis featuring blade-shaft coupling effect of turbine rotor models / Norihisa Anegawa in Transactions of the ASME . Journal of engineering for gas turbines and power, Vol. 133 N° 2 (Fevrier 2011)
[article]
in Transactions of the ASME . Journal of engineering for gas turbines and power > Vol. 133 N° 2 (Fevrier 2011) . - 08 p.
Titre : Vibration diagnosis featuring blade-shaft coupling effect of turbine rotor models Type de document : texte imprimé Auteurs : Norihisa Anegawa, Auteur ; Hiroyuki Fujiwara, Auteur ; Osami Matsushita, Auteur Année de publication : 2012 Article en page(s) : 08 p. Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Blades Couplings Nuclear power stations Rotors Shafts Steam turbines Turbines Vibrations Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : As is well known, zero and one nodal diameter (k=0 and k=1) modes of a blade system interact with the shaft system. The former couples with torsional and/or axial shaft vibrations, and the latter with bending shaft vibrations. This paper addresses the latter. With respect to k=1 modes, we discuss, from experimental and theoretical viewpoints, in-plane blades and out-of-plane blades attached radially to a rotating shaft. We found that when we excited the shaft at the rotational speed of Omega=|omegab−omegas| (where omegab is the blade natural frequency, omegas the shaft natural frequency, and Omega is the rotational speed), the exciting frequency nu=omegas induced shaft-blade coupling resonance. In addition, in the case of the in-plane blade system, we encountered an additional resonance attributed to deformation caused by gravity. In the case of the out-of-plane blade system, we experienced two types of abnormal vibrations. One is the additional resonance generated at Omega=omegab/2 due to the unbalanced shaft and the anisotropy of bearing stiffness. The other is a flow-induced, self-excited vibration caused by galloping due to the cross-sectional shape of the blade tip because this instability disappeared in the rotation test inside a vacuum chamber. The two types of abnormal vibrations occurred at the same time, and both led to the entrainment phenomenon, as identified by our own frequency analysis technique. DEWEY : 620.1 ISSN : 0742-4795 En ligne : http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JETPEZ00013 [...] [article] Vibration diagnosis featuring blade-shaft coupling effect of turbine rotor models [texte imprimé] / Norihisa Anegawa, Auteur ; Hiroyuki Fujiwara, Auteur ; Osami Matsushita, Auteur . - 2012 . - 08 p.
Génie Mécanique
Langues : Anglais (eng)
in Transactions of the ASME . Journal of engineering for gas turbines and power > Vol. 133 N° 2 (Fevrier 2011) . - 08 p.
Mots-clés : Blades Couplings Nuclear power stations Rotors Shafts Steam turbines Turbines Vibrations Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : As is well known, zero and one nodal diameter (k=0 and k=1) modes of a blade system interact with the shaft system. The former couples with torsional and/or axial shaft vibrations, and the latter with bending shaft vibrations. This paper addresses the latter. With respect to k=1 modes, we discuss, from experimental and theoretical viewpoints, in-plane blades and out-of-plane blades attached radially to a rotating shaft. We found that when we excited the shaft at the rotational speed of Omega=|omegab−omegas| (where omegab is the blade natural frequency, omegas the shaft natural frequency, and Omega is the rotational speed), the exciting frequency nu=omegas induced shaft-blade coupling resonance. In addition, in the case of the in-plane blade system, we encountered an additional resonance attributed to deformation caused by gravity. In the case of the out-of-plane blade system, we experienced two types of abnormal vibrations. One is the additional resonance generated at Omega=omegab/2 due to the unbalanced shaft and the anisotropy of bearing stiffness. The other is a flow-induced, self-excited vibration caused by galloping due to the cross-sectional shape of the blade tip because this instability disappeared in the rotation test inside a vacuum chamber. The two types of abnormal vibrations occurred at the same time, and both led to the entrainment phenomenon, as identified by our own frequency analysis technique. DEWEY : 620.1 ISSN : 0742-4795 En ligne : http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JETPEZ00013 [...] Viscous disk air flow displacement device (VDAFDD) / Jonathan M. Hilton in Transactions of the ASME . Journal of fluids engineering, Vol. 132 N° 10 (Octobre 2010)
PermalinkVortical structures and instability analysis for athena wetted transom flow with full-scale validation / Shanti Bhushan in Transactions of the ASME . Journal of fluids engineering, Vol. 134 N° 3 (Mars 2012)
PermalinkWave propagation and mode localization in simply supported multispan beams with Couplers on Supports / Dong-Ok Kim in Journal of engineering mechanics, Vol. 130 N°7 (Juillet 2004)
PermalinkWet compression analysis including velocity slip effects / White, A. J. in Transactions of the ASME . Journal of engineering for gas turbines and power, Vol. 133 N° 8 (Août 2011)
PermalinkWide gap braze repair of gas turbine blades and vanes / Huang, Xiao in Transactions of the ASME . Journal of engineering for gas turbines and power, Vol. 134 N° 1 (Janvier 2012)
PermalinkWind turbine gearbox fault detection using multiple sensors with features level data fusion / Y. Lu in Transactions of the ASME . Journal of engineering for gas turbines and power, Vol. 134 N° 4 (Avril 2012)
PermalinkTechniques de l'ingénieur : étude et propriétés des métaux Ti551. Essais mécaniques sur les métaux et alliage / Bréchet, Yves
PermalinkTechniques de l'ingénieur : innovations technologique Ti958. Innovations en matériaux avancés / Annie Boudrant
PermalinkTechniques de l'ingénieur : matériaux fonctionnels Ti580. Matériaux actifs et intelligents. Surfaces fonctionnelles / Gérard Béranger
PermalinkTechniques de l'ingénieur : matériaux fonctionnels Ti580. Matériaux à propriétés thermiques. Matériaux pour l'énergie / Gérard Béranger
Permalink