Vibration absorption using non-dissipative complex attachments with impacts and parametric stiffness

dc.contributor.authorRoveri, N.en_US
dc.contributor.authorCarcaterra, A.en_US
dc.contributor.authorAkay, A.en_US
dc.departmentDepartment of Mechanical Engineeringen_US
dc.description.abstractStudies on prototypical systems that consist of a set of complex attachments, coupled to a primary structure characterized by a single degree of freedom system, have shown that vibratory energy can be transported away from the primary through use of complex undamped resonators. Properties and use of these subsystems as by energy absorbers have also been proposed, particularly using attachments that consist of a large set of resonators. These ideas have been originally developed for linear systems and they provided insight into energy sharing phenomenon in large structures like ships, airplanes, and cars, where interior substructures interact with a master structure, e.g., the hull, the fuselage, or the car body. This paper examines the effects of nonlinearities that develop in the attachments, making them even more complex. Specifically, two different nonlinearities are considered: (1) Those generated by impacts that develop among the attached resonators, and (2) parametric effects produced by time-varying stiffness of the resonators. Both the impacts and the parametric effects improve the results obtained using linear oscillators in terms of inhibiting transported energy from returning to the primary structure. The results are indeed comparable with those obtained using linear oscillators but with special frequency distributions, as in the findings of some recent papers by the same authors. Numerically obtained results show how energy is confined among the attached oscillators. © 2009 Acoustical Society of America.en_US
dc.publisherAcoustical Society of Americaen_US
dc.source.titleJournal of the Acoustical Society of Americaen_US
dc.subjectCar bodiesen_US
dc.subjectEnergy absorbersen_US
dc.subjectEnergy sharingsen_US
dc.subjectFrequency distributionsen_US
dc.subjectLarge structuresen_US
dc.subjectLinear oscillatoren_US
dc.subjectParametric effectsen_US
dc.subjectPrimary structuresen_US
dc.subjectSingle degree of freedom systemsen_US
dc.subjectTime-varying stiffnessen_US
dc.subjectVibration absorptionen_US
dc.subjectVibratory energyen_US
dc.titleVibration absorption using non-dissipative complex attachments with impacts and parametric stiffnessen_US
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