Inner detached frequency response curves: an experimental study

Certain nonlinear vibrating systems have frequency response curves (FRCs), in which isolated detached curves exist inside the main continuous FRC. The behavior of these systems has hitherto been studied analytically and numerically, but to the authors’ knowledge, there is no record of an inner detac...

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Bibliographic Details
Published inJournal of sound and vibration Vol. 396; pp. 246 - 254
Main Authors Gatti, Gianluca, Brennan, Michael J.
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier Ltd 26.05.2017
Elsevier Science Ltd
Subjects
Computer simulation
Design of experiments
Detached resonance curve
Detaching
Frequency response
Isolated resonance curve
Nonlinear systems
Nonlinear vibration
Vibration
Isolated resonance curve
Detached resonance curve
Nonlinear vibration
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Summary:Certain nonlinear vibrating systems have frequency response curves (FRCs), in which isolated detached curves exist inside the main continuous FRC. The behavior of these systems has hitherto been studied analytically and numerically, but to the authors’ knowledge, there is no record of an inner detached FRC being detected experimentally. These curves may be hidden by numerical or experimental analysis, particularly when a system is subject to swept or stepped-sine excitation. Their existence may thus lead to unexpected dramatic changes in the amplitude of the system response. This paper presents an experimental study that involves the design, construction and testing of a specific system that has an isolated detached FRC inside the main continuous FRC. The experimental design of the test rig is supported by multibody dynamic simulations, and in the experimental tests the existence of a detached FRC was verified.
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ISSN:0022-460X
1095-8568
DOI:10.1016/j.jsv.2017.02.008