L. Zhang, Q. Zeng

There are two important problems encountered in dynamic finite element (FE)model updating based on measured modal parameters. One ls the large difference in the number of degrees of freedom (DOF) between analytical and experimental models, the other is the . inference from random errors in the measured mode shapes. Several mode shape pre-processing methods used for DOF expansion and mode shape smoothing. Including dynamic expansion method, modal coordinate method, newly developed weighted curvefittlng method and two combinations, are compared for FE-model updating. Comparisons are made by means of two case studies: a stepped beam with global and local design parameters, and a beam structure with Jumped masses which simulates the dynamic behavior of a spacecraft structure.

International Forum on Aeroelasticity and Structural Dynamics 1991, Aachen

Conference Paper

englisch

21,0 x 29,7 cm, 4 Seiten

DGLR-Bericht, 1991, 1991-06, International Forum on Aeroelasticity and Structural Dynamics 1991 Proceedings; S.257-260; 1991; Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V., Bonn

NA

aeroelasticity

Bestellbar

1991