On the Performance of a Two-Stage Vibration Isolation System Which has Geometrically Nonlinear Stiffness

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorLu, Zeqi
dc.creatorYang, Tiejun
dc.creatorBrennan, Michael J.
dc.creatorLi, Xinhui
dc.creatorLiu, Zhigang
dc.date2015-03-18T15:55:23Z
dc.date2016-10-25T20:34:27Z
dc.date2015-03-18T15:55:23Z
dc.date2016-10-25T20:34:27Z
dc.date2014-12-01
dc.date.accessioned2017-04-06T07:14:08Z
dc.date.available2017-04-06T07:14:08Z
dc.identifierJournal Of Vibration And Acoustics-transactions Of The Asme. New York: Asme, v. 136, n. 6, 5 p., 2014.
dc.identifier1048-9002
dc.identifierhttp://hdl.handle.net/11449/117184
dc.identifierhttp://acervodigital.unesp.br/handle/11449/117184
dc.identifier10.1115/1.4028379
dc.identifierWOS:000344732800014
dc.identifierhttp://dx.doi.org/10.1115/1.4028379
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/927831
dc.descriptionLinear single-stage vibration isolation systems have a limitation on their performance, which can be overcome passively by using linear two-stage isolations systems. It has been demonstrated by several researchers that linear single-stage isolation systems can be improved upon by using nonlinear stiffness elements, especially for low-frequency vibrations. In this paper, an investigation is conducted into whether the same improvements can be made to a linear two-stage isolation system using the same methodology for both force and base excitation. The benefits of incorporating geometric stiffness nonlinearity in both upper and lower stages are studied. It is found that there are beneficial effects of using nonlinearity in the stiffness in both stages for both types of excitation. Further, it is found that this nonlinearity causes the transmissibility at the lower resonance frequency to bend to the right, but the transmissibility at the higher resonance frequency is not affected in the same way. Generally, it is found that a nonlinear two-stage system has superior isolation performance compared to that of a linear two-stage isolator.
dc.languageeng
dc.publisherAsme
dc.relationJournal Of Vibration And Acoustics-transactions Of The Asme
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectvibration isolation
dc.subjectnonlinear stiffness
dc.subjecttransmissibility
dc.subjecttwo-stage
dc.titleOn the Performance of a Two-Stage Vibration Isolation System Which has Geometrically Nonlinear Stiffness
dc.typeOtro


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