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Keywords: resonance
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Journal Articles
Article Type: Technical Briefs
J. Vib. Acoust. December 2021, 143(6): 064502.
Paper No: VIB-20-1429
Published Online: May 4, 2021
... subsea fishing, accumulator replacements are challenging. In-line dampeners provide a straightforward solution but have never been designed to cater for resonance dampening as such. Commercially developed in-line dampeners also have nitrogen-filled bladders or act like and behave as accumulators, posing...
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. August 2020, 142(4): 041003.
Paper No: VIB-19-1429
Published Online: March 25, 2020
... response of the system with five different boundary conditions are illustrated. Traditional excited static strings show nodes when resonance occurs. However, it is found in this study that the static nodes of axially moving strings appear under arbitrary frequency even far away from resonance, if the...
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. June 2020, 142(3): 031010.
Paper No: VIB-19-1480
Published Online: March 3, 2020
...Ashu Sharma The dynamics of parametrically excited systems are characterized by distinct types of resonances including parametric, combination, and internal. Existing resonance conditions for these instability phenomena involve natural frequencies and thus are valid when the amplitude of the...
Journal Articles
Article Type: Research-Article
J. Vib. Acoust. October 2013, 135(5): 051033.
Paper No: VIB-13-1101
Published Online: July 5, 2013
... window and thin film is successfully derived and used in some practical examples. Resonance takes place for a suitable input frequency, and thus such transducers can be used to either generate acoustic waves of specific frequency or to filter specific resonant frequencies from a wide spectrum of signals...
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. April 2010, 132(2): 021004.
Published Online: March 16, 2010
... a very slender continuous rotor. When the rotor is supported horizontally, the difference in support stiffness and the asymmetrical nonlinearity appear as a result of shifting from the equilibrium position. By the influences of the internal resonance and the initial axial force, the nonlinear...
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. February 2010, 132(1): 011011.
Published Online: February 1, 2010
... has been developed yet. In the previous paper, the authors proposed a simple method by utilizing discontinuous spring characteristics, which can suppress steady-state resonances. This paper shows that this method is also effective to suppress unstable vibrations. By using this method, the unstable...
Topics: Rotors, Springs
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. June 2008, 130(3): 031012.
Published Online: May 14, 2008
.... Because the rotor is slender, the natural frequency p f n of a forward whirling mode and p b n of a backward whirling mode have the relation of internal resonance p f n : p b n = 1 : ( − 1 ) . Due to the influence of the internal resonance, various phenomena occur, such as Hopf bifurcation, an almost...
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. April 2008, 130(2): 021013.
Published Online: March 21, 2008
... frequencies and mode shapes for the linear problem are found. The correction terms are obtained from the last order of expansion. Nonlinear frequencies are calculated and then amplitude and phase modulation figures are presented for different forcing and damping cases. The 3:1 internal resonances are...
Journal Articles
Article Type: Research Papers
J. Vib. Acoust. February 2008, 130(1): 011002.
Published Online: November 12, 2007
... components. The extent of the mitigation varies for different excitation frequency ranges. The critical amplitude of the dry friction torque beyond which the system operates with a locked arm is determined analytically. Superharmonic resonances are observed in the responses of the generalized span...
Journal Articles
Article Type: Technical Papers
J. Vib. Acoust. October 2007, 129(5): 577–589.
Published Online: May 4, 2007
...Mark H. Holdhusen; Kenneth A. Cunefare A state-switched absorber (SSA) is a device that is capable of switching between discrete stiffnesses; thus, it is able to instantaneously switch between resonance frequencies. The state-switched absorber is essentially a passive vibration absorber between...
Journal Articles
Article Type: Technical Papers
J. Vib. Acoust. April 2006, 128(2): 156–169.
Published Online: July 13, 2005
...Tsuyoshi Inoue; Yukio Ishida Rotating machinery has effects of gyroscopic moments, but most of them are small. Then, many kinds of rotor systems satisfy the relation of 1 to ( − 1 ) type internal resonance approximately. In this paper, the dynamic characteristics of nonlinear phenomena, especially...
Journal Articles
Article Type: Technical Papers
J. Vib. Acoust. October 2004, 126(4): 476–484.
Published Online: December 21, 2004
... frequency of a forward-whirling mode p f > 0 and that of a backward-whirling mode p b < 0 have the relation of internal resonance p f : p b = 1 : − 1 . Recently, many researchers analyzed nonlinear phenomena by using the Jeffcott rotor with nonlinear elements. However, they did not take this internal...
Topics: Resonance, Rotors
Journal Articles
Article Type: Technical Papers
J. Vib. Acoust. October 2004, 126(4): 567–573.
Published Online: December 21, 2004
...D. F. Shi; W. J. Wang; L. S. Qu In order to overcome the shortcomings in the traditional envelope analysis in which manually specifying a resonant frequency band is required, a new approach based on the fusion of the wavelet transform and envelope spectrum is proposed for detecting and localizing...
Journal Articles
Article Type: Technical Papers
J. Vib. Acoust. July 2004, 126(3): 326–331.
Published Online: July 30, 2004
... . Manuscript received September 2002; Revised April 2003. Associate Editor: K. Grosh. 01 September 2002 01 April 2003 30 07 2004 gyroscopes nonlinear dynamical systems vibrations micromechanical devices resonance Many micro-electromechanical (MEM) devices operate near...
Journal Articles
Article Type: Technical Papers
J. Vib. Acoust. April 2004, 126(2): 235–244.
Published Online: May 4, 2004
... essence, as a nonlinear energy sink (NES). Energy pumping is caused by 1:1 resonance captures on resonant manifolds of the damped systems. We show that the NES is capable of absorbing significant portions of the energies generated by transient, broadband external excitations. By performing a series of...
Journal Articles
Article Type: Technical Papers
J. Vib. Acoust. January 2004, 126(1): 149–162.
Published Online: February 26, 2004
... conditions are derived considering the static friction of the rotating motion at the supporting point (pivot) of the pendulum. It is theoretically shown that the static friction at the pivot of the pendulum plays a dominant role in the suppression of parametric resonance. The boundary conditions are...
Journal Articles
Article Type: Technical Papers
J. Vib. Acoust. January 2004, 126(1): 118–125.
Published Online: February 26, 2004
... excited near resonance. The method is applicable if the damping ratio of viscous component can be considered small. The Coulomb and viscous friction parameters can be extracted from two or more input-output amplitude pairs at resonance. The method is tested numerically and experimentally. Experimental...
Journal Articles
Article Type: Technical Papers
J. Vib. Acoust. January 2003, 125(1): 59–63.
Published Online: January 6, 2003
...A. S. Nobari, Assistant Professor; M. Shahramyar, Graduate Student Presently, the Nonlinear Single Resonant Mode (NLSRM) method is the most efficient method for extending standard linear modal analysis concept to nonlinear systems. In this method, it is assumed that the mode of vibration in the...
Journal Articles
Article Type: Technical Papers
J. Vib. Acoust. July 2002, 124(3): 367–375.
Published Online: June 12, 2002
... (stick-slip). The results suggest non-zero mass dampers which are tuned as optimal vibration absorbers provide substantial resonance response attenuation and substantially reduce the size of the nonlinear analysis region in the damper parameter space. Contributed by the Technical Committee on...
Journal Articles
Article Type: Technical Briefs
J. Vib. Acoust. July 2002, 124(3): 460–464.
Published Online: June 12, 2002
... speeds. The simulations show that in a wide rotating speed range there are several extra resonance frequencies, which are different from those appearing in well-known linear models. When a power failure occurs to AMB machinery, the AMB rotor should pass through all these resonance frequencies. Under some...