Abstract :
[en] The conceptofnonlinearnormalmodes(NNMs)isdiscussedinthepresentpaperandits
companion,PartII.BecausethereisvirtuallynoapplicationoftheNNMstolarge-scale
engineeringstructures,thesepapersareanattempttohighlightseveralaspectsthat
mightdrivetheirdevelopmentinthefuture.Specifically,wesupportthat(i)numerical
methodsforthecontinuationofperiodicsolutionspavethewayforaneffectiveand
practical computationofNNMs,and(ii)time–frequencyanalysisisparticularlysuitable
fortheanalysisoftheresultingdynamics.Anotherobjectiveofthepresentpaperisto
describe,insimpleterms,andtoillustratethefundamentalpropertiesofNNMs.Thisis
achievedtoconvincethestructuraldynamicistnotnecessarilyacquaintedwiththemthat
theyareausefulframeworkfortheanalysisofnonlinearvibratingstructures.
& 2008ElsevierLtd.Allrightsreserved
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