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Keywords: damping
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Journal Articles
Article Type: Research Papers
J. Comput. Nonlinear Dynam. January 2012, 7(1): 011014.
Published Online: November 10, 2011
...P. K. Kankar; Satish C. Sharma; S. P. Harsha In this paper the nonlinear dynamic responses of a rigid rotor supported by ball bearings due to surface waviness of bearing races are analyzed. A mathematical formulation has been derived with consideration of the nonlinear springs and nonlinear damping...
Journal Articles
Article Type: Research Papers
J. Comput. Nonlinear Dynam. July 2011, 6(3): 031010.
Published Online: February 1, 2011
...Alan M. Whitman; Hashem Ashrafiuon; Kenneth R. Muske An analytical stability analysis of the steady trajectory for a surface vessel with various damping models is presented in this work. The analysis is based on a control-oriented, three degrees-of-freedom model that considers vessel motion only...
Journal Articles
Article Type: Research Papers
J. Comput. Nonlinear Dynam. April 2011, 6(2): 021006.
Published Online: October 22, 2010
.... In the current paper, axial stiffness and damping are included, and a more realistic model is obtained. In the dynamic analysis of the drill string model, the separation in time scales between the fast axial dynamics and slow torsional dynamics is exploited. Therefore, the fast axial dynamics, which exhibits...
Journal Articles
Article Type: Research Papers
J. Comput. Nonlinear Dynam. October 2010, 5(4): 041012.
Published Online: August 12, 2010
...Junyi Cao; Chengbin Ma; Hang Xie; Zhuangde Jiang In this paper, nonlinear dynamics of Duffing system with fractional order damping is investigated. The fourth-order Runge–Kutta method and tenth-order CFE-Euler method are introduced to simulate the fractional order Duffing equations. The effect...
Journal Articles
Journal Articles
Article Type: Research Papers
J. Comput. Nonlinear Dynam. July 2010, 5(3): 031005.
Published Online: May 14, 2010
... by reducing the flexible degrees of freedom of a rack used for active vibration damping of a scanning tunneling microscope. The aim of this section is the development of an a priori error bound based on Gramian matrices. First, the error system H E ( s ) = H ( s ) − H ¯ ( s...
Journal Articles
Article Type: Research Papers
J. Comput. Nonlinear Dynam. April 2010, 5(2): 021012.
Published Online: March 2, 2010
... to that of β 2 . This section discusses the case of β 1 and β 2 possessing different values. 05 01 2009 27 04 2009 02 03 2010 bifurcation damping Lyapunov matrix equations shock absorbers vibration control nonlinear tuned mass damper multiple...
Journal Articles
Article Type: Research Papers
J. Comput. Nonlinear Dynam. April 2010, 5(2): 021005.
Published Online: February 11, 2010
... is the damping constant, and χ is the stiffness defined by χ = 2 E A / d 1 2 + b 1 2 (where E A is elastic cable force). The excitation force is assumed to be predominantly governed by the inertia force produced due to water particle kinematics. Generally, drag force...
Journal Articles
Article Type: Technical Briefs
J. Comput. Nonlinear Dynam. July 2009, 4(3): 034503.
Published Online: May 21, 2009
...Jorge Luis Palacios Felix; José Manoel Balthazar; Reyolando M. L. R. F. Brasil; Bento Rodrigues Pontes, Jr. In this paper, a nonideal mechanical system with the LuGre friction damping model is considered. The mechanical model of the system is an oscillator not necessarily linear connected...
Journal Articles
Article Type: Research Papers
J. Comput. Nonlinear Dynam. July 2009, 4(3): 031005.
Published Online: May 19, 2009
...S. N. J. Costa; J. M. Balthazar The purpose of this work is to investigate the control of the oscillations and the suppression of vibrations in damped and coupled oscillators. In this sense, we look into the potential of using a nonlinear energy sink in combination with an optimal linear control...
Journal Articles
Article Type: Research Papers
J. Comput. Nonlinear Dynam. July 2009, 4(3): 031004.
Published Online: May 19, 2009
... tool is modeled as a flexible multibody system model including a nonlinear flatness-based position control. Both the combination of a frequency shaped linear quadratic regulator with an active damping concept in a high authority control/low authority control approach and the H 2 optimal control...
Journal Articles
Article Type: Research Papers
J. Comput. Nonlinear Dynam. January 2008, 3(1): 011013.
Published Online: December 12, 2007
... treated to bring the velocity dependent nonlinear hydrodynamic damping term to the left hand side of the equation of motion. Use of these two techniques makes the equation of motion amenable to the application of method IHBC. In order to trace different branches of the response curve and investigate...
Journal Articles
Article Type: Research Papers
J. Comput. Nonlinear Dynam. July 2007, 2(3): 211–217.
Published Online: March 9, 2007
...Zsolt Szabó; Attila Lukács The current paper investigates the nonlinear stationary oscillations of a quarter vehicle model with two degrees of freedom subjected to a vertical road excitation. The damping of the wheel suspension has a bilinear characteristic, so that the damping strength is larger...
Journal Articles
Article Type: Research Papers
J. Comput. Nonlinear Dynam. July 2007, 2(3): 249–266.
Published Online: January 23, 2007
... springs (mechanical) damping nonlinear differential equations Historically the analysis community has acknowledged the role of joints in structural dynamics ambivalently. We ascribe the nonlinearities of our structures to the presence of joints, but we go ahead and use linear models. Though...
Journal Articles
Article Type: Research Papers
J. Comput. Nonlinear Dynam. July 2007, 2(3): 232–241.
Published Online: January 7, 2007
...Mohammad I. Younis; Ali H. Nayfeh We present a new method for simulating squeeze-film damping of microplates actuated by large electrostatic loads. The method enables the prediction of the quality factors of microplates under a limited range of gas pressures and applied electrostatic loads up...
Journal Articles
Article Type: Research Papers
J. Comput. Nonlinear Dynam. April 2007, 2(2): 180–189.
Published Online: November 13, 2006
...X. Fang; J. Tang Granular damping, which possesses promising features for vibration suppression in harsh environments such as in turbo-machinery and spacecraft, has been studied using empirical analysis and more recently using the discrete element method (DEM). The mechanism of granular damping...
Journal Articles
Article Type: Research Papers
J. Comput. Nonlinear Dynam. July 2006, 1(3): 248–256.
Published Online: March 24, 2006
... parameters through significant nonlinear damage. The significant nonlinear damage implied includes effects from loose bolted joints, dry frictional damping, large articulated motions, etc. Note that currently most damage detection algorithms in structures are based on finding changed stiffness parameters...
Journal Articles
Article Type: Research Papers
J. Comput. Nonlinear Dynam. July 2006, 1(3): 212–220.
Published Online: March 22, 2006
... in industry. 27 06 2005 22 03 2006 time-varying systems friction bifurcation damping vibrations The friction-induced oscillations have been of great interest for a long time because the friction-induced vibrations extensively exist in engineering. The discontinuity of the system...
Journal Articles
Article Type: Research Papers
J. Comput. Nonlinear Dynam. July 2006, 1(3): 187–195.
Published Online: March 2, 2006
... absorb energy from a linear nonconservative system (damped) structure to a nonlinear attachment weakly coupled to the linear one. This rapid and irreversible transfer of energy, named energy pumping, is studied by taking into account uncertainties on parameters, especially damping (since damping plays...
Journal Articles
Article Type: Research Papers
J. Comput. Nonlinear Dynam. January 2006, 1(1): 13–24.
Published Online: May 18, 2005
... maintain the absorber frequency close to the excitation frequency, an absorber is most effective when lightly damped. For these order-tuned absorbers this is precisely the situation. As the rotor speed is decreased from above resonance, the same sequence of events is observed to occur. In fact...