Relevant bibliographies by topics / Subharmonic mode

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  2. Dissertations / Theses
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Academic literature on the topic 'Subharmonic mode'

Author: Grafiati
Published: 30 May 2022
Last updated: 31 July 2025

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Journal articles on the topic "Subharmonic mode"

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IBADULLAEV, Muhtarhan, Akrom N. TOVBAEV, and Azamat Zh ESENBEKOV. "On the General Theory for Analysis of Subharmonic Oscillations in Three-Phase Ferroresonance Circuits and Systems." Elektrichestvo, no. 12 (2021): 35–44. http://dx.doi.org/10.24160/0013-5380-2021-12-35-44.

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The general theory for analysis of subharmonic oscillations at a frequency of ω/3 in three-phase ferroresonance circuits is presented. The occurrence and existence of ferroresonance oscillations at subharmonic frequencies in power transmission lines and power supply systems is highly undesirable, since they cause overvoltages at various frequencies. At the same time, there is an extensive class of nonlinear electrical circuits in which the excitation of autoparametric oscillations at the frequency of subharmonics forms the basis of phase-discrete frequency converting devices serving as seconda
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Monkewitz, Peter A. "Subharmonic resonance, pairing and shredding in the mixing layer." Journal of Fluid Mechanics 188 (March 1988): 223–52. http://dx.doi.org/10.1017/s0022112088000710.

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An instability-wave analysis is presented to describe the spatial evolution of a fundamental mode and its subharmonic on an inviscid parallel mixing layer. It incorporates explicitly the weakly nonlinear interaction between the two modes. The computational finding that the development of the subharmonic, leading eventually to pairing or shredding, crucially depends on its phase relation with the fundamental is fully confirmed. Furthermore it is shown that a critical fundamental amplitude has to be reached before the (spatial) subharmonic becomes phase locked with the fundamental and exhibits a
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Panigrahi, P. K., and S. Acharya. "Multi-Modal Forcing of the Turbulent Separated Shear Flow Past a Rib." Journal of Fluids Engineering 126, no. 1 (2004): 22–31. http://dx.doi.org/10.1115/1.1637634.

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Experiments have been conducted to study the development of flow behind a surface mounted rib under different phase controlled excitation. Single mode excitation and multi-mode excitation with different relative phases are studied. The results presented include the coherent and random components of the turbulent energy and shear stresses, the energy exchange with the mean flow and between the modes, and the phase decorrelation of the coherent components. The fundamental-subharmonic excitation does not provide any significant improvements in the shear layer growth over the fundamental excitatio
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Yang, Ruixin, Frederic K. Browand, Pierre Coullet, and Patrick Huerre. "A model of defect-induced pairing in mixing layers." Journal of Fluid Mechanics 248 (March 1993): 403–23. http://dx.doi.org/10.1017/s0022112093000825.

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Experiment have shown that the well-known vortex pairing process may take place first in defect regions where the fundamental structure is weakest. A model is introduced here to describe this defect-induced pairing process. The model is constructed in such a way that, in a certain parameter range, a stable fundamental mode and a stable subharmonic mode may coexist. The numerical simulation demonstrates that, when initial conditions consist of a dominant fundamental with one or more defects, the subharmonic component is preferentially generated in the cores of these defects. Moreover, the resul
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Eigenwillig, Christoph M., Wolfgang Wieser, Benjamin R. Biedermann, and Robert Huber. "Subharmonic Fourier domain mode locking." Optics Letters 34, no. 6 (2009): 725. http://dx.doi.org/10.1364/ol.34.000725.

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Gribanov, Alexey, Mikhail Yakovin, Dmitry Yakovin, and Mikhail Mosin. "Subharmonic mode locking of a Q-switched Nd:YAG laser." Chinese Optics Letters 21, no. 3 (2023): 031406. http://dx.doi.org/10.3788/col202321.031406.

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Seya, Keiji, Yasuo Tanaka, and Mine Takeuti. "Nonlinear Two-Mode Coupling Models of Radial Stellar Oscillations." Publications of the Astronomical Society of Japan 42, no. 3 (1990): 405–18. https://doi.org/10.1093/pasj/42.3.405.

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Abstract The two-mode coupling of a stellar model has been studied by using coupled van der Pol oscillators. Numerical studies show subharmonic phase-locking in their coupling oscillations. Period-doubling bifurcation accompanied by beats develops with the changes of a parameter. It is suggested that the observed double-periodic stellar pulsations might be subharmonic phase-locking, and not the superposition of two non-synchronized oscillations.
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Friedland, L., J. Fajans, and E. Gilson. "Subharmonic autoresonance of the diocotron mode." Physics of Plasmas 7, no. 5 (2000): 1712–18. http://dx.doi.org/10.1063/1.873989.

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GORDEYEV, S. V., and F. O. THOMAS. "Temporal subharmonic amplitude and phase behaviour in a jet shear layer: wavelet analysis and Hamiltonian formulation." Journal of Fluid Mechanics 394 (September 10, 1999): 205–40. http://dx.doi.org/10.1017/s0022112099005650.

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Fourier and wavelet transformation techniques are utilized in a complementary manner in order to characterize temporal aspects of the transition of a planar jet shear layer. The subharmonic is found to exhibit an interesting temporal amplitude and phase variation that has not been previously reported. This takes the form of intermittent π-shifts in subharmonic phase between two fixed phase values. These phase jumps are highly correlated with local minima of the subharmonic amplitude. In contrast, the fundamental amplitude and phase show no such behaviour. The temporal phase behaviour of the su
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CHEN, WEN-YAU, and C. F. CHEN. "Effect of gravity modulation on the stability of convection in a vertical slot." Journal of Fluid Mechanics 395 (September 25, 1999): 327–44. http://dx.doi.org/10.1017/s0022112099006011.

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The nature of instability occurring in a differentially heated infinite slot under steady gravity depends only on the Prandtl number of the contained Boussinesq fluid. For fluids with Pr < 12.5, the instability is shear dominated and onsets in a steady convection mode; for fluids with Pr > 12.5, the instability is buoyancy dominated and onsets in an oscillatory mode. In this paper, we examine the effect of gravity modulation on the stability characteristics of convection in an infinite slot with both kinds of fluids, in particular, Pr = 1 and Pr = 25. Using the method of Sinha & Wu (
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Dissertations / Theses on the topic "Subharmonic mode"

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Костенко, Юрий Викторович. "Анализ параметров динамических процессов в виброударных машинах с изменяющимися массово-жесткостными характеристиками". Thesis, НТУ "ХПИ", 2015. http://repository.kpi.kharkov.ua/handle/KhPI-Press/19912.

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Диссертация на соискание научной степени кандидата технических наук по специальности 05.02.09 – динамика и прочность машин. – Национальный технический университет "Харьковский политехнический институт", Харьков, 2016. Диссертация посвящена разработке подходов, методов и моделей для исследования динамических процессов в виброударных системах с учетом изменяемой во времени массы технологического груза и нелинейной жесткости упругих опор. В данной работе изложен новый подход к учету влияния переменной массы технологического груза на характер динамических процессов в виброударной системе. Разрабо
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Костенко, Юрій Вікторович. "Аналіз параметрів динамічних процесів у віброударних машинах зі змінними масово-жорсткісними характеристиками". Thesis, ФО-П Дуюнова Т. В, 2016. http://repository.kpi.kharkov.ua/handle/KhPI-Press/19909.

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Дисертація на здобуття наукового ступеня кандидата технічних наук за спеціальністю 05.02.09 – динаміка та міцність машин. – Національний технічний університет "Харківський політехнічний інститут", Харків, 2016. Дисертація присвячена розробці підходів, методів і моделей для дослідження динамічних процесів у віброударних системах з урахуванням змінної у часі маси технологічного вантажу та нелінійної жорсткості пружних опор. У роботі викладений новий підхід до урахування впливу змінної маси технологічного вантажу на характер динамічних процесів у віброударній системі. Запропоновані залежності, щ
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Mehrem, Issa Mohamed Mehrem Ahmed. "Nonlinear acoustics in periodic media: from fundamental effects to applications." Doctoral thesis, Universitat Politècnica de València, 2017. http://hdl.handle.net/10251/80289.

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The natural dynamics are not ideal or linear. To understand their complex behavior, we needs to study the nonlinear dynamics in more simple models. This thesis is consist of two main setups. Both setups are simplified models for the behavior occurs in the complex systems. We studied in both systems the same nonlinear dynamics such as higher-harmonics, sub-harmonics, solitary waves,...etc. In Chapter (2), the propagation of nonlinear waves in a lattice of repelling particles is studied theoretically and experimentally. A simple experimental setup is proposed, consisting in an array of coupled m
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Hammad, Bashar Khalil. "Modeling, Simulation, and Analysis of Micromechanical Filters Coupled with Capacitive Transducers." Diss., Virginia Tech, 2008. http://hdl.handle.net/10919/27744.

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The first objective of this Dissertation is to present a methodology to calculate analytically the mode shapes and corresponding natural frequencies and determine critical buckling loads of mechanically coupled microbeam resonators with a focus on micromechanical filters. The second objective is to adopt a nonlinear approach to build a reduced-order model and obtain closed-form expressions for the response of the filter to a primary resonance. The third objective is to investigate the feasibility of employing subharmonic excitation to build bandpass filters consisting of either two sets of two
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Books on the topic "Subharmonic mode"

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University of Arizona. Dept. of Aerospace and Mechanical Engineering. and Lewis Research Center, eds. Instabilities and and subharmonic resonances in subsonic heated round jets. University of Arizona, Dept. of Aerospace and Mechanical Engineering, 1990.

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Book chapters on the topic "Subharmonic mode"

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Liu, Hai-Feng, Ampalavanapillai Nirmalathas, Dalma Novak, and Yoh Ogawa. "Subharmonic Mode-Locking of Semiconductor Lasers Operating at Millimetre-Wave Frequencies." In Springer Series in Photonics. Springer Berlin Heidelberg, 1999. http://dx.doi.org/10.1007/978-3-642-58469-5_7.

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Tsuchiya, M., T. Hoshida, and T. Kamiya. "Passively Mode-Locked Semiconductor Lasers Stabilized by Subharmonic Electrical Injection and Their Application to Millimeter Wave Photonics." In Solid-State Science and Technology Library. Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-011-5141-2_28.

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Beals, Richard, and Roderick S. C. Wong. "Harmonic and subharmonic functions; the Dirichlet problem." In More Explorations in Complex Functions. Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-28288-1_5.

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Alippi, A., A. Bettucci, M. Germano, and D. Passeri. "Generation Threshold of Subharmonic Modes in Piezoelectric Resonator." In Universality of Nonclassical Nonlinearity. Springer New York, 2006. http://dx.doi.org/10.1007/978-0-387-35851-2_30.

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Volvert, Martin, and Gaëtan Kerschen. "Characterizing Fundamental, Superharmonic, and Subharmonic Resonances Using Phase Resonance Nonlinear Modes." In NODYCON Conference Proceedings Series. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-81162-4_57.

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Benedettini, F., and G. Rega. "1/2 Subharmonic Resonance and Chaotic Motions in a Model of Elastic Cable." In Nonlinear Dynamics in Engineering Systems. Springer Berlin Heidelberg, 1990. http://dx.doi.org/10.1007/978-3-642-83578-0_4.

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Corke, Thomas C., and Mahmood Ghassemi. "Secondary Growth of 3-D Modes in Far-Wakes Through Tuned and Detuned Subharmonic Resonance." In Bluff-Body Wakes, Dynamics and Instabilities. Springer Berlin Heidelberg, 1993. http://dx.doi.org/10.1007/978-3-662-00414-2_26.

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Jordan, D. W., and P. Smith. "Poincaré sequences, homoclinic bifurcation, and chaos." In Nonlinear ordinary differential equations. Oxford University PressOxford, 1999. http://dx.doi.org/10.1093/oso/9780198565635.003.0013.

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Abstract Important features can be totally obscured in such a diagram, but Poincare maps can be used to detect underlying structure, such as periodic solutions having the forcing or a subharmonic frequency. In this context the investigation of periodic solutions, nearly periodic solutions, and similar phenomena is to a considerable extent an exploratory matter in which computation plays at the present time a very significant part. A search for hidden periodicities, such as subharmonic periods, is best carried out by starting with a period in mind and then looking for solutions with this period
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Woafo, Paul, and Abobda Theodore Lejuste. "Modeling, Mathematical and Numerical Studies of a New Biventricular Model for Artificial Heart Powered by an Electromagnet Subjected to Sinusoidal and Square Voltages." In Biomedical Engineering. IGI Global, 2018. http://dx.doi.org/10.4018/978-1-5225-3158-6.ch007.

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This paper describes and investigates the dynamics of a new model of biventricular model for artificial heart which consists of two ferromagnetic masses fixed on springs and subjected to a common electromagnet powered by sinusoidal and square wave voltage sources. The effects of the following control parameters are considered: the external voltage source frequency and amplitude, the ratio between the stiffness coefficients, and the one between the masses. As results in both cases of external excitations, subharmonic oscillations, hysteresis, coexistence of limit cycle and point attractor, perm
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Chen, Yushu, Liangqiang Zhou, and Fangqi Chen. "Subharmonic Bifurcations and Chaos for a Model of Micro-Cantilever in MEMS." In Perspectives in Mathematical Sciences. WORLD SCIENTIFIC, 2010. http://dx.doi.org/10.1142/9789814289313_0002.

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Conference papers on the topic "Subharmonic mode"

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Eisenbrey, John R., Jaydev K. Dave, Valgerdur G. Halldorsdottir, et al. "Simultaneous B-mode/subharmonic imaging and 3D subharmonic imaging on a modified commercial ultrasound scanner." In 2011 IEEE International Ultrasonics Symposium (IUS). IEEE, 2011. http://dx.doi.org/10.1109/ultsym.2011.0151.

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Hammad, Bashar K., Ali H. Nayfeh, and Eihab Abdel-Rahman. "A Subharmonic Resonance-Based MEMS Filter." In ASME 2007 International Mechanical Engineering Congress and Exposition. ASMEDC, 2007. http://dx.doi.org/10.1115/imece2007-42201.

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We present a novel micromechanical filter exploiting the subharmonic resonance of order one-half to obtain a center frequency twice the fundamental frequency of the primary resonators, an ideal stopband, and a sharp roll-off. The filter is made up of two clamped-clamped microbeam resonators connected by a coupling beam. We discretize the distributed-parameter system using the Galerkin procedure to obtain a reduced-order model composed of two nonlinear coupled ODEs. It accounts for geometrical and electrical nonlinearities as well as the coupling between these two fields. Using the method of mu
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Ribeiro, Ana Filipa, Tiago Gomes, and Maria Ana Cataluna. "Subharmonic Optical Injection Locking of a Mode-locked Laser Diode." In 2023 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC). IEEE, 2023. http://dx.doi.org/10.1109/cleo/europe-eqec57999.2023.10232456.

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Ji, C., N. Chubun, R. Broeke, et al. "InP based colliding pulse mode locked laser synchronized by electrical subharmonic hybrid mode locking." In 2005 Conference on Lasers and Electro-Optics (CLEO). IEEE, 2005. http://dx.doi.org/10.1109/cleo.2005.202006.

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Chung, K. P., and A. O. Marcano. "Phase stabilization and digital phase locking of laser subharmonic signals." In OSA Annual Meeting. Optica Publishing Group, 1988. http://dx.doi.org/10.1364/oam.1988.fbb9.

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Laser subharmonic signals generated through degenerate parametric oscillation exhibit interesting properties that may be used for optical signal phase stabilization and digital phase locking. The laser subharmonic generation may be described by a set of differential equations coupling the fundamental and subharmonic fields in a nonlinear medium with second-order susceptibilities. It is shown analytically that phase stabilization and bistability are possible for type 1 phase matching but not for type 2 phase matching or harmonic generation. Results of numerical integrations confirming analytica
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Natslavas, Sotirios, and Petros Tratskas. "Prediction and Elimination of Subharmonic Resonances in Mechanical Systems With Nonlinear Foundations." 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/detc1995-0290.

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Abstract In the first part of this work an analysis is presented on the dynamics of a two degree of freedom nonlinear mechanical oscillator. The model consists of a rigid body which rests on a foundation with nonlinear stiffness. This body can exhibit both vertical and rocking motions, which are coupled through the nonlinearities only. In the present study, attention is focused on the response of the system under external harmonic excitation of the vertical translation only, leading to conditions of subharmonic resonance of order three. Also, the model parameters are chosen so that its two lin
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Hammad, Bashar K., Ali H. Nayfeh, and Eihab M. Abdel-Rahman. "A Study of Subharmonic Excitation of Mechanically Coupled Microbeams for Filtration." In ASME 2008 International Mechanical Engineering Congress and Exposition. ASMEDC, 2008. http://dx.doi.org/10.1115/imece2008-66728.

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We study the feasibility of employing subharmonic resonance of order one-half to create a bandpass filter using two clamped-clamped microbeam resonators connected by a weak coupling beam. We discretize the distributed-parameter system using the Galerkin procedure to obtain a reduced-order model composed of two nonlinear coupled ODEs. It accounts for geometric and electric nonlinearities as well as the coupling between these two fields. Using the method of multiple scales, we determine four first-order nonlinear ODEs describing the amplitudes and phases of the modes. We use these equations to d
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Ishida, Yukio, and Shin Murakami. "Forced Oscillations of Rotating Shaft With Nonlinear Spring Characteristics and Internal Damping: Subharmonic Oscillation of Order 1/3 and Entrainment." In ASME 1999 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/detc99/vib-8080.

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Abstract An elastic rotating shaft supported by ball bearings may have nonlinear spring characteristics due to clearance and internal damping due to friction between the shaft and the bearings. In such a system, self-excited oscillations appear in the post critical region and nonlinear forced oscillations appear at various resonance points. In this paper, a phenomenon in the neighborhood of the critical speed of the subharmonic oscillation of order 1/3 of a forward whirling mode is discussed. It is clarified that, similar to the case of the subharmonic oscillation of order 1/2 of a forward whi
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Tang, Kui, Lin Cheng, and Wing-Hung Ki. "Analyzing Subharmonic Oscillation of Current-Mode Buck Converters with the Circuit-Oriented Geometrical Approach." In 2019 IEEE International Conference on Integrated Circuits, Technologies and Applications (ICTA). IEEE, 2019. http://dx.doi.org/10.1109/icta48799.2019.9012813.

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Needles, A., J. Graba, C. Bilan, et al. "12A-3 A New Real-Time High-Frequency Subharmonic Contrast Mode for Mouse Imaging." In 2007 IEEE Ultrasonics Symposium Proceedings. IEEE, 2007. http://dx.doi.org/10.1109/ultsym.2007.270.

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