Scaling Factor Estimation Using an Optimized Mass Change Strategy, Part 1: Theory

Manuel López Aenlle, Pelayo Fernández Fernández, Rune Brincker, Alfonso Fernández Canteli

Publikation: Kapitel i bog/rapport/konference-proceedingKonferencebidrag i proceedingsForskningpeer review

Abstrakt

In natural input modal analysis, only un-scaled mode shapes can be obtained. The mass change method is, in many cases, the simplest way to estimate the scaling factors, which involves repeated modal testing after changing the mass in different points of the structure where the mode shapes are known. The scaling factors are determined using the natural frequencies and mode shapes of both the modified and the unmodified structure. However, the uncertainty on the scaling factor estimation depends on the modal analysis and the mass change strategy (number, magnitude and location of the masses) used to modify the dynamic behavior of the structure. In this paper, a procedure to optimize the mass change strategy is proposed, which uses the modal parameters(natural frequencies and mode shapes) of the original structure as the basic information.
OriginalsprogEngelsk
TitelProceedings of the 2nd International Operational Modal Analysis Conference
RedaktørerRune Brincker, Nis Møller
Antal sider8
Vol/bindVol. 2
ForlagAalborg Universitet
Publikationsdato2007
Sider421-428
ISBN (Trykt)8791606144
StatusUdgivet - 2007
Udgivet eksterntJa
Begivenhed2nd International Operational Modal Analysis Conference - Copenhagen, Danmark
Varighed: 30. apr. 20072. maj 2007
Konferencens nummer: 2

Konference

Konference2nd International Operational Modal Analysis Conference
Nummer2
LandDanmark
ByCopenhagen
Periode30/04/200702/05/2007

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