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A virtual experiment for the detection of specific features in the frequency re...
Gatti, Gianluca; Marchesiello, Stefano; Brennan, Michael J. [UNESP]Made available in DSpace on 2022-04-28T19:05:00Z (GMT). No. of bitstreams: 0 Previous issue date: 2014-01-01; This paper presents an investigation into some practical issues that may be present in a real experiment, when trying to validate the theoretical frequency response curve of a two degree-of-freedom nonlinear system consisting of coupled linear and nonlinear oscillators. Some specific features, such as d...
Fundamental analysis on the intentional use of nonlinear stiffness in some dyna...
Gatti, Gianluca; Brennan, Michael J. [UNESP]; Tang, BinMade available in DSpace on 2022-04-28T19:26:49Z (GMT). No. of bitstreams: 0 Previous issue date: 2019-01-01; Although nonlinearity in dynamical systems have been of concern for many years due to its unpredictable effects, researchers and engineers have recently begun to incorporate it into mechanical and mechatronic devices to improve their performance, make them compact and reduce their weight. This paper pre...
Examples of Physical Systems Described by the Duffing Equation
Brennan, Michael J. [UNESP]; Kovacic, IvanaMade available in DSpace on 2022-04-28T18:58:35Z (GMT). No. of bitstreams: 0 Previous issue date: 2011-03-03; In this chapter several examples of physical systems whose dynamic behaviour can be approximated by several forms of the Duffing equation are given. The physical systems are chosen to illustrate the physical phenomena that result in different forms of this equation related to several types of geometric ...
Background: On Georg Duffing and the Duffing Equation
Kovacic, Ivana; Brennan, Michael J. [UNESP]Made available in DSpace on 2022-04-28T18:58:35Z (GMT). No. of bitstreams: 0 Previous issue date: 2011-03-03; In this chapter a historical background to Duffing's work is given. In addition, his biography and bibliography are presented. The content of his famous book is described. The evolution of his work to the present day is also tracked. © 2011 John Wiley & Sons, Ltd. All rights reserved.; University of Nov...
Forced Harmonic Vibration of an Asymmetric Duffing Oscillator
Kovacic, Ivana; Brennan, Michael J. [UNESP]Made available in DSpace on 2022-04-28T18:58:35Z (GMT). No. of bitstreams: 0 Previous issue date: 2011-03-03; Two nonlinear asymmetric systems are described in this chapter. The first is a pure cubic nonlinear oscillator with a constant and a harmonic force acting on it, associated with a vibration isolator. The second is a hanging cable which the asymmetry is caused by gravity. Both of these systems have a sin...
The Duffing Equation: Nonlinear Oscillators and their Behaviour
Kovacic, Ivana; Brennan, Michael J. [UNESP]Made available in DSpace on 2022-04-28T18:59:09Z (GMT). No. of bitstreams: 0 Previous issue date: 2011-03-03; The Duffing Equation: Nonlinear Oscillators and their Behaviour brings together the results of a wealth of disseminated research literature on the Duffing equation, a key engineering model with a vast number of applications in science and engineering, summarizing the findings of this research. Each chap...
Blind sources separation of harmonic signals for output only modal analysis
Li, Xinhui; Brennan, Michael J. [UNESP]; Yang, Tiejun; Lu, Zeqi; Dong, JianchaoMade available in DSpace on 2022-04-29T07:20:16Z (GMT). No. of bitstreams: 0 Previous issue date: 2013-01-01; Blind source separation (BSS) is an emerging technique in array processing and data analysis, aimed at recovering unobserved sources from observed signals which are a filtered mix of the sources. The only assumption in the technique is the mutual independence or uncorrelation of the source signals. This...
Effect of asymmetry in the restoring force of the click mechanism in insect flight
Abolfathi, Ali; Changizi, M. Amin; Brennan, Michael J. [UNESP]; IOPMade available in DSpace on 2021-06-25T12:18:32Z (GMT). No. of bitstreams: 0 Previous issue date: 2016-01-01; The aim of this paper is to examine the effect of asymmetry in the force-deflection characteristics of an insect flight mechanism on its nonlinear dynamics. An improved simplified model for insect flight mechanism is suggested and numerical methods are used to study its dynamics. The range at which the ...
A frequency domain blind identification method for operational modal analysis u...
Li, Xinhui; Antoni, Jerome; Brennan, Michael J. [UNESP]; Yang, Tiejun; Liu, ZhigangMade available in DSpace on 2020-12-10T17:06:00Z (GMT). No. of bitstreams: 0 Previous issue date: 2020-01-14; Operational modal analysis is an experimental modal analysis approach, which uses vibration data collected when the structure is under operating conditions. Amongst the methods for operational modal analysis, blind source separation-based methods have been shown to be efficient and powerful. The existin...
Numerical Study of a Single-Sided Vibro-Impact Track Nonlinear Energy Sink Cons...
Li, Wenke; Wierschem, Nicholas E.; Li, Xinhui; Yang, Tiejun; Brennan, Michael J. [UNESP]Made available in DSpace on 2020-12-10T19:46:24Z (GMT). No. of bitstreams: 0 Previous issue date: 2019-12-01; Natural Science Foundation of China; In this paper, the single-sided vibro-impact track nonlinear energy sink (SSVI track NES) is studied. The SSVI track NES, which is attached to a primary structure, has nonlinear behavior caused by the NES mass moving on a fixed track and impacting on the primary stru...