Bibliografias temáticas / Pendule centrifuge

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Literatura científica selecionada sobre o tema "Pendule centrifuge"

Autor: Grafiati

Publicado: 4 de junho de 2021

Última modificação: 7 de fevereiro de 2022

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Artigos de revistas sobre o assunto "Pendule centrifuge"

Ineichen, Laurent. "Controllable centrifugal pendulum". PAMM 10, n.º 1 (16 de novembro de 2010): 611–12. http://dx.doi.org/10.1002/pamm.201010298.

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Jinnouchi, Y., Y. Araki, J. Inoue e S. Kubo. "Dynamic Instability of a High-Speed Rotor Containing a Partitioned Cavity Filled With Two Kinds of Liquids". Journal of Pressure Vessel Technology 111, n.º 4 (1 de novembro de 1989): 450–56. http://dx.doi.org/10.1115/1.3265703.

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This paper is concerned with the dynamic instability of a high-speed rotor containing a partitioned cavity filled with two kinds of liquids of different density. The system considered simulates a centrifuge of two liquids type, in which the cylindrical cavity is divided into fan-shaped compartments in order to suppress asynchronous whirling motions induced by waves in the liquids traveling around the cavity. Assuming rotor vibrations to be small, liquids inviscid, and external damping negligible, perturbed motions of the liquid-rotor system are analyzed. The theory shows that the rotor containing a partitioned cavity can still exhibit unstable behavior, similar to that observed for a rotor system equipped with centrifugal pendula, in the region where the rotor speed is nearly equal to the sum of the critical speed of the system and the natural frequency of the liquids. The theory has been verified by the experiments. The dependence of the unstable region on the main system parameters is also discussed.

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Mayet, J., e H. Ulbrich. "Tautochronic centrifugal pendulum vibration absorbers". Journal of Sound and Vibration 333, n.º 3 (fevereiro de 2014): 711–29. http://dx.doi.org/10.1016/j.jsv.2013.09.042.

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Zink, Matthias, e Markus Hausner. "The centrifugal pendulum-type absorber". ATZ worldwide 111, n.º 7-8 (julho de 2009): 42–47. http://dx.doi.org/10.1007/bf03225088.

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Hässler, Martin, Ad Kooy, Roland Welter e Viktor Lichtenwald. "Clutch Disc With Centrifugal Pendulum Absorber". Auto Tech Review 5, n.º 4 (abril de 2016): 26–31. http://dx.doi.org/10.1365/s40112-016-1118-7.

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Häßler, Martin, Ad Kooy, Roland Welter e Viktor Lichtenwald. "Clutch Disc with Centrifugal Pendulum Absorber". ATZ worldwide 118, n.º 1 (19 de dezembro de 2015): 42–47. http://dx.doi.org/10.1007/s38311-015-0087-9.

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Mitchiner, R. G., e R. G. Leonard. "Centrifugal Pendulum Vibration Absorbers—Theory and Practice". Journal of Vibration and Acoustics 113, n.º 4 (1 de outubro de 1991): 503–7. http://dx.doi.org/10.1115/1.2930214.

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Reciprocating mechanical systems, such as pumps and compressors, present a nonuniform dynamic load to the driving motor. These load variations and their interactions with the dynamic characteristics of the motor result in dynamic torque variations on the rotor which have very significant harmonic components. These torque variations contribute to undesirable dynamic loading of the mounting frame and subsequent transmission of vibrations and noise into the supporting structure. Centrifugal pendulum absorbers offer an excellent means for the elimination of the effects of some of these torque harmonics. Since most reciprocating machinery operates over a speed range depending on load conditions, the centrifugal absorber is an excellent means for insuring that the suppression of vibrations is insensitive to speed and local conditions. While the virtues of centrifugal absorbers are well known as are the differential equations describing the dynamics of the absorbers, the literature does not address the case of real absorbers with distributed mass properties. This paper presents a derivation of the equations of motion for the rotor and the distributed mass pendulum, along with those insights and techniques necessary for the practical design of a centrifugal pendulum system. The tuning of the pendulum is discussed along with damping requirements. A case study is presented where a set of pendulums is employed on the rotor of an air compressor driven by a close-coupled electric induction motor. In the case study, first and second harmonic rotor torques (30 percent and 9 percent, respectively, of the average rotor torque) are eliminated with 3.77 lb and 0.83 lb pendulums in a 3-horsepower, 875 rpm machine.

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Pitre, Sangita N., S. V. Dhurandhar, D. G. Blair e Ju Li. "Losses in pendular suspensions due to centrifugal coupling". Pramana 42, n.º 3 (março de 1994): 261–70. http://dx.doi.org/10.1007/bf02847687.

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Cera, Mattia, Marco Cirelli, Ettore Pennestrì e Pier Paolo Valentini. "Design analysis of torsichrone centrifugal pendulum vibration absorbers". Nonlinear Dynamics 104, n.º 2 (abril de 2021): 1023–41. http://dx.doi.org/10.1007/s11071-021-06345-y.

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Kwak, Gyubin, e Hyeong-ill Lee. "Investigation of the Point-Mass Pendulum Centrifugal Pendulum Absorber Using Transfer Matrix Method". Transactions of the Korean Society for Noise and Vibration Engineering 31, n.º 1 (20 de fevereiro de 2021): 64–72. http://dx.doi.org/10.5050/ksnve.2021.31.1.064.

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Mais fontes

Teses / dissertações sobre o assunto "Pendule centrifuge"

Cullaz, Etienne. "Modélisation de l’endommagement des guidages d’un pendule centrifuge". Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLC008.

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Le développement de nouvelles motorisations plus économes en carburant, entraine une augmentation du niveau de vibration. Afin de répondre à cela, Valeo développe un nouveau système : le pendule centrifuge. C’est dans cette phase de développement que s’inscrit ce travail de thèse. L’objectif est de réaliser un outil de pré-dimensionnement permettant de modéliser l’endommagement des guidages d’un pendule centrifuge. Une première étude expérimentale présente la faisabilité du suivi du système mécanique par l’utilisation de l’imagerie dynamique. Des essais de caractérisation matériaux des différents constituants du système viennent ensuite compléter l’étude. Ce travail expérimental réalisé à l’aide d’un tribomètre bi-disque permet d’obtenir les lois de frottements en fonction du taux de glissement ainsi que leur sensibilité à l’état de surface, au traitement thermique et au chargement. Un modèle théorique de détermination des valeurs du glissement est ensuite proposé, permettant de prendre en compte les différentes géométries de pendules. Enfin, les perspectives d’industrialisation sont envisagées en proposant une étude paramétrique sur le système réel en vue de son dimensionnement ainsi qu’une étude d’endurance pour modéliser l’usure du système
The development of more fuel efficient engines results in an increase in the vibration levels. To solve this, Valeo is developing a new system: the centrifugal pendulum. This PhD research thesis registered as a contribution to the system development phase. The objective is to realize a predimensioning tool in order to model the wear of a centrifugal pendulum. A first experimental study shows the feasibility of monitoring the mechanical system through the use of dynamic imaging. Materials characterization tests of the various system components complete the study. The experimental work carried out using a twin-disc tribometer provides the friction laws versus sliding rate and their sensitivity to surface condition, processing and loading. A theoretical model for determining sliding values is then proposed to take into account the different pendulum geometries. Finally, the perpectives of industrialization are considered with a parametric study on the real system for a sizing purpose and an endurance study to model the wear of the system

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Smith, Emma. "Analysis and simulation of centrifugal pendulum vibration absorbers". Thesis, KTH, MWL Marcus Wallenberg Laboratoriet, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-185217.

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When environmental laws are constricted and downsizing of engines has become the reality of the vehicle industry, there needs to be a solution for the rise in torsion vibrations in the drivetrain. These increased levels of torsion vibrations are mostly due to excitations from the firing pulses, which in turn have become increased due to higher cylinder pressures. One of the solutions for further dampening the system is to add a centrifugal pendulum absorber to the flywheel, and predicting the behaviour of such a device has become imperative.The intent of this thesis is to create a model that will accurately emulate the effectiveness and functionality of a centrifugal pendulum absorber, so that it can be used in simulations to predict vehicle behaviour with its addition. To validate the model, a comparison is made between simulated results, using the model created in Adams/Car and Matlab, and road measurements conducted using a prototype acquired by the industry.The results from the simulations show that, with existing theory on the subject and software provided by Scania, an accurate model can be created. The reduction of torsion vibrations is evident, and the model’s behaviour correlates to that of the prototype.Future work on the subject requires a larger insight into pendulums tuned to multiple orders, and an extension of the model geometry would be advantageous.

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Simionatto, Vinícius Gabriel Segala 1986. "The use of centrifugal pendulums for torsional vibration control in automotive powertrains = O uso de pêndulos centrífugos para controle de vibrações torcionais em trens de potência automotivos". [s.n.], 2015. http://repositorio.unicamp.br/jspui/handle/REPOSIP/265815.

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Orientador: Milton Dias Junior
Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecânica
Made available in DSpace on 2018-08-27T02:12:19Z (GMT). No. of bitstreams: 1 Simionatto_ViniciusGabrielSegala_D.pdf: 8460823 bytes, checksum: 3f1c69b6dfe1b24e67844c22ad4d181d (MD5) Previous issue date: 2015
Resumo: Absorvedores de Vibração Pendulares Centrífugos (ou CPVAs) são uma tecnologia criada em 1911, que trouxe excelentes resultados na redução de vibração torcional de muitos sistemas. Porém, sua aplicação em trens de potência automotivos para redução de vibração no virabrequim tornou-se inviável ao final da década de 1940 pela existência de dampers viscosos à base de silicone, uma solução mais barata e com performance similar em certas aplicações. Contudo, a vibração torcional transmitida a transmissões manuais ou automatizadas, em certas velocidades críticas, pode gerar ruído em níveis inaceitáveis, e as soluções atuais para a atenuação deste tipo de vibração, em algumas aplicações, são ou pouco efetivas, como o atrito em discos de embreagem, ou muito custosas, como volantes de dupla massa. Por isso, neste trabalho busca-se a aplicação de absorvedores de vibração pendulares em um disco de embreagem de um trem de potência automotivo equipado com uma transmissão automatizada para a redução de vibração torcional na transmissão, reduzindo possivelmente o ruído de rattle. Para este fim, primeiramente testes são realizados no veículo em estudo para o levantamento de dados torcionais do trem de potência, e em seguida, um modelo linear torcional é proposto, para que a dinâmica torcional do trem de potência seja representada. Em seguida, uma análise extensiva dos principais tipos de CPVA é realizada. São realizadas análises lineares e não lineares em modelos com parâmetros adimensionais de um e dois rotores com pêndulos centrífugos, e nas análises não lineares, o Método de Múltiplas Escalas é utilizado; um método mais robusto e preciso do que o método que vem sendo utilizado nos principais trabalhos nesta área. Além disso, as análises são feitas considerando-se que os pêndulos possuem trajetória genérica, e ênfase é dada às trajetórias clássicas: circular, cicloide e epiciclóide. Com base nestas análises, duas metodologias de projeto de pêndulos centrífugos são propostas. Além disso, um protótipo de disco de embreagem com pêndulo é proposto. Então, baseando-se nas limitações do projeto, simulações são feitas utilizando o modelo proposto para o trem de potência e o modelo não linear do pêndulo. As primeiras simulações são feitas obedecendo as limitações do projeto, que propiciam um pequeno raio de instalação do pêndulo e permitem que ele possua massa muito menor do que o valor ideal. Estas simulações mostram que, neste caso o pêndulo se torna instável e ineficaz. Nas simulações seguintes, as limitações de projeto são desprezadas e ambos os projetos de pêndulo são testados. Com maior inércia, o absorvedor pendular é capaz de reduzir substancialmente a vibração torcional na transmissão sem que seja necessário introduzir atrito no disco de embreagem. Contudo, pêndulos com maior inércia podem comprometer a vida útil dos sincronizadores da transmissão, e por isso estudos devem ser realizados para verificar este efeito colateral
Abstract: Centrifugal Pendulum Vibration Absorbers (or CPVAs) are a technology which dates back to 1911, and which has brought excellent results on the reduction of torsional vibrations in many systems. Its application in automotive powertrains for the reduction of vibration on the crankshaft became impracticable by the second half of the 1940s due to the existence of silicone based viscous dampers, a cheaper solution that had similar performance in many applications. However, torsional vibration transmitted to manual or semi-automatic gearboxes may cause unacceptable noise in some critical speeds, and the current solutions for the mitigation of this kind of vibration are, in some cases, either not effective, as torsional friction in clutch disks, or too expensive, as dual mass flywheels. For this reason, in this work, the use of centrifugal pendulum vibration absorbers on a clutch disk of a vehicle powertrain equipped with a semi-automatic gearbox is studied, aiming at reducing torsional vibration at the gearbox, leading to possible reduction of rattle noise. For this means, firstly tests are performed on the vehicle under investigation in order to obtain torsional data from its powertrain, and a linear torsional model of it is proposed next, so that the torsional dynamics of the powertrain can be represented. Then, an extensive analysis of the main types of CPVA are performed. Linear and nonlinear analyses are made in models with dimensionless parameters composed by one of two rotors and centrifugal pendulums. For the nonlinear analyses, the Method of Multiple Scales is used; a more robust and precise method than the one which has been used on the main literature in this area. Besides, the analyses are performed considering general-path pendulums and emphasis is given to the classical paths: circular, cycloid and epicycloid. Based on these analyses, two design techniques for CPVAs are proposed. Furthermore, a prototype of a clutch disk with pendulum absorbers is proposed. Then, based on project limitations, simulations are performed using the powertrain model and the nonlinear model of the CPVA. The first simulations are performed taking into consideration the project limitations, which allow a small radius for pinning the pendulum and also for a small mass of the pendulum bob, much lower than the ideal value. These simulations show that, in this case, the pendulum becomes unstable and ineffective. On the forthcoming simulations, project limitations are neglected and both pendulum design techniques are tested. With higher inertia, the pendulum absorbers are capable of providing a substantial reduction on the amplitude of vibration of the gearbox without the need for adding torsional friction to the clutch disk. However, pendulum bobs with high inertia may harm the service life of the gearbox¿s synchronizers, and further studies must be performed to evaluate this side effect
Doutorado
Mecanica dos Sólidos e Projeto Mecanico
Doutor em Engenharia Mecânica

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Schottmüller, Martin [Verfasser], e A. [Akademischer Betreuer] Albers. "Ein Ansatz zur dynamischen Charakterisierung und Bewertung von nichtlinearen Schwingungssystemen anhand des Beispiels Fliehkraftpendel = An approach for dynamic characterization and evaluation of nonlinear vibration systems using the example of a centrifugal pendulum absorber / Martin Schottmüller ; Betreuer: A. Albers". Karlsruhe : KIT-Bibliothek, 2021. http://d-nb.info/1240314515/34.

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Capítulos de livros sobre o assunto "Pendule centrifuge"

Stahl, Karsten, Hermann Pflaum, Georg Johann Meingaßner, Heinz Ulbrich e Johannes Mayer. "Planetary Centrifugal Pendulum Absorber (pCPA) – New type of Centrifugal Pendulum Absorber for Applications in Highly Downsized Hybrid and Range Extender Combustion Engines". In Conference on Future Automotive Technology, 73–84. Wiesbaden: Springer Fachmedien Wiesbaden, 2013. http://dx.doi.org/10.1007/978-3-658-01141-3_5.

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Wang, Lu, Shushan Bai e Xiaokai Chen. "Analysis of Parameter Matching Characteristics for Centrifugal Pendulum Vibration Absorber". In Proceedings of SAE-China Congress 2015: Selected Papers, 61–74. Singapore: Springer Singapore, 2015. http://dx.doi.org/10.1007/978-981-287-978-3_6.

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Acar, Mustafa A., e Steven W. Shaw. "Application of the Harmonic Balance Method to Centrifugal Pendulum Vibration Absorbers". In Special Topics in Structural Dynamics, Volume 6, 243–52. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-29910-5_25.

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Trabalhos de conferências sobre o assunto "Pendule centrifuge"

Shi, Chengzhi, Robert G. Parker e Steven W. Shaw. "Optimal Tuning of Centrifugal Pendulum Vibration Absorbers". In ASME 2013 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/detc2013-12449.

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This note provides an analytical proof of the optimal tuning of centrifugal pendulum vibration absorbers (CPVAs) to reduce in-plane translational and rotational vibration for a rotor with N cyclically symmetric substructures attached to it. The reaction forces that the substructures (helicopter or wind turbine blades, for example) exert on the rotor are first analyzed. The linearized equations of motion for the vibration are then solved by a gyroscopic system modal analysis procedure. The solutions show that the rotor translational vibration at order j is reduced when one group of CPVAs is tuned to order jN − 1 and the other is tuned to order jN + 1. Derivation of this result is not available in the literature. The current derivation also yields the better known result that tuning CPVAs to order jN reduces rotational rotor vibration at order j.

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Al-suwaiyan, Abdallah S., e Steven W. Shaw. "Stability Limitations for Multiple Centrifugal Pendulum Vibration Absorbers". In ASME 1999 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/detc99/vib-8055.

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Abstract Centrifugal pendulum vibration absorbers are a type of tuned dynamic absorber used for the attenuation of torsional vibrations in rotating and reciprocating machines. They consist of masses that are constrained to move along a specific path relative to the rotating shaft of the machine. Previous analytical studies have considered the performance of multi-absorber systems with a very specific path and of single absorber systems with general paths. In this paper we investigate the performance and dynamic stability of systems comprised of multiple, identical centrifugal pendulum vibration absorbers that have general paths. The study is carried out by considering a scaling of the system parameters based on physically realistic ranges of dimensionless parameters, which allows for application of the method of averaging. It is found that performance is limited by two distinct types of instabilities. In one of these, the systems of absorbers lose their synchronous character, while the other is a classical nonlinear jump behavior that affects all absorbers identically and leads to disastourous results. These results are used to evaluate the performance of systems with common types of absorber paths, namely circles and cycloids. The analytical results are compared against numerical simulations and good agreement is found.

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Ishida, Yukio, Tsuyoshi Inoue, Taishi Kagawa e Motohiko Ueda. "Torsional Vibration Suppression by a Centrifugal Pendulum Vibration Absorber". In ASME 2005 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/detc2005-84648.

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Driving torque of rotating machinery, such as automobile engines, changes periodically. As a result, torsional vibrations occur and cause serious noise and vibration problems. In this study, the dynamic characteristics of centrifugal pendulum vibration absorbers restraining torsional vibration is investigated both theoretically and experimentally. In the theoretical analysis, the nonlinear characteristics are taken into consideration under the assumption of large amplitude vibration of pendulum. It is clarified that the centrifugal pendulum, although it has remarkable effects on suppressing harmonic vibration, induces large amplitude harmonic vibrations, the second and third superharmonic resonances, and unstable vibrations of harmonic type. We propose various methods to suppress these secondarily induced vibration and show that it is possible to suppress torsional vibrations to substancially zero amplitude in all through the rotational speed range.

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Zhang, Wei. "Chaos of Nonlinear Vibratory System With Single Well Potential". In ASME 1995 Design Engineering Technical Conferences collocated with the ASME 1995 15th International Computers in Engineering Conference and the ASME 1995 9th Annual Engineering Database Symposium. American Society of Mechanical Engineers, 1995. http://dx.doi.org/10.1115/detc1995-0326.

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Abstract In this paper we study chaotic dynamics of nonlinear vibratory system under combined parametric and forcing excitations with single well potential. Especially we focus on chaos of a centrifugal pendulum vibration absorber. The centrifugal pendulum vibration absorber is an efficient device that is used to reduce torsional vibration in crank shaft of internal combustion engine. Because reduced dynamical model of the centrifugal pendulum vibration absorber is a nonlinear system, there is very rich dynamical behavior in this system. We use Meknikov’s method and numerical method to study chaotic dynamics of the centrifugal pendulum vibration absorber and discuss the route from bifurcations of T2 torus to chaotic motion.

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Ishida, Yukio, Tsuyoshi Inoue, Tomohiko Fukami e Motohiko Ueda. "Torsional Vibration Suppression by the Roller Type Centrifugal Vibration Absorbers". In ASME 2007 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/detc2007-34640.

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The centrifugal pendulum vibration absorber (CPVA) has been used for a long time as a method to suppress torsional vibrations. Recently, the roller type CPVA, that has a similar characteristic but simpler structure, has been investigated and started to be used in some automobile engines. However, the dynamical characteristics of the roller type CPVA are not known well. In this study, the nonlinear equations motion of the roller type CPVA are derived and their characterictics are investigated theoretically and experimentally. Especially, the difference between pendulum type CPVA and roller type CPVA is discussed from the viewpoint of the effect of a vibration suppression.

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Vidmar, Brendan J., Steven W. Shaw, Brian F. Feeny e Bruce K. Geist. "Analysis and Design of Multiple Order Centrifugal Pendulum Vibration Absorbers". In ASME 2012 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/detc2012-71074.

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We consider nonlinear interactions in systems of order-tuned torsional vibration absorbers. These absorbers, which consist of centrifugally driven pendulums fitted to a rotor, are used to reduce engine-order torsional vibrations in rotating machines, including automotive engines, helicopter rotors, and light aircraft engines. In all current applications, absorber systems are designed to reduce torsional vibrations at a single order. However, when two or more excitation orders are present and absorbers are introduced to address different orders, undesirable nonlinear interactions become possible under certain resonance conditions. Under these conditions, a common example of which occurs for orders n and 2n, crosstalk between the absorbers, acting through the rotor inertia, can result in instabilities that are detrimental to system response. In order to design absorber systems that avoid these interactions, we develop predictive models that allow one to select proper tuning and sizing of the absorbers. These models are based on perturbation methods applied to the system equations of motion, and they yield system response features, including absorber and rotor response amplitudes and stability, as a function of parameters of interest. The model-based analytical results are compared against numerical simulations of the complete nonlinear equations of motion, and are shown to be in good agreement. These results are useful for the selection of absorber parameters for desired performance. For example, they allow for approximate closed form expressions for the ratio of absorber masses at the two orders that yield optimal performance.

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Vitaliani, Emiliano, Daniele Di Rocco e Martin Sopouch. "Modelling and Simulation of General Path Centrifugal Pendulum Vibration Absorbers". In 12th International Conference on Engines & Vehicles. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2015. http://dx.doi.org/10.4271/2015-24-2387.

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Acar, Mustafa A., Steven W. Shaw e Brian F. Feeny. "Nonlinear Dynamics of Flexible Rotating Shafts With Centrifugal Pendulum Vibration Absorbers". In ASME 2015 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/detc2015-47889.

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We consider the nonlinear vibration response of rotating flexible shafts fitted with centrifugally driven pendulum vibration absorbers (CPVAs) that are used to address engine-order torsional vibrations. The model used to represent the behavior of the flexible shaft consists of two lumped inertial elements with an interconnecting stiffness element, which captures the rigid body and fundamental torsional vibration modes of the rotor. The absorbers are centrifugally driven pendulums fitted to a rotor element, such that their natural frequencies scale with the rotor speed, and can thus tuned to a given order of rotation. Previous analysis of a linearized version of this coupled rotor-absorber system revealed frequency veering behavior as the rotation speed varies, and showed that one can detune the absorber to eliminate key system resonances. In this paper the behavior of the system is analyzed for large absorber amplitudes using perturbation methods and numerical simulations. It is shown that the absorbers remain effective in reducing torsional vibration when moving through large amplitudes, and that the resonance avoidance is similarly robust. This has practical implications for the tuning of absorbers in certain applications.

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Shi, Chengzhi, e Robert G. Parker. "Vibration Mode Structure of Cyclically Symmetric Centrifugal Pendulum Vibration Absorber Systems". In ASME 2012 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/detc2012-70086.

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This work develops an analytical model of centrifugal pendulum vibration absorber systems with equally-spaced, identical absorbers and uses it to investigate the structure of the modal vibration properties. The planar model admits two translational and one rotational degree-of-freedom for the rotor and a single arclength degree-of-freedom for each absorber. The gyroscopic effects from rotor rotation are taken into account. Examination of the associated eigenvalue problem reveals well-defined structure of the vibration modes resulting from the cyclic symmetry of the absorbers. The vibration modes are classified into rotational, translational, and absorber modes. Characteristics of each mode type are analytically proved.

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Hosek, Martin, Hakan Elmali e Nejat Olgac. "Centrifugal Delayed Resonator: Theory and Experiments". In ASME 1997 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/detc97/vib-3829.

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Abstract A novel active vibration absorption technology, the Centrifugal Delayed Resonator (CDR), is presented as an efficient method for eliminating undesired torsional oscillations in rotating mechanical structures. The core idea is to reconfigure the dynamics of a damped centrifugal pendulum arrangement so that it behaves like an ideal real-time tunable absorber. This objective is achieved by applying a control torque based on proportional position feedback with variable gain and time delay. Fundamentals of the control strategy and its basic properties are explained, effects of the CDR absorber on a single-degree-of-freedom rotating structure are studied, and representative results of laboratory tests are presented. The strengths of this vibration control technology consist in complete elimination of a fundamental frequency component of undesired torsional oscillations, full effectiveness of vibration suppression in problems where the fundamental frequency of oscillations varies with time, very wide range of operating frequencies, complete decoupling of the feedback control from the mechanical properties of the rotating structure, comparatively simple implementation of the control algorithm, and fault-tolerant performance in the case of control failure.

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