A procedure for the evaluation of bridge flutter derivatives is presented, based on the results of forced vibration wind tunnel tests on section models. Under the assumption that the total aerodynamic force is the sum of a narrow-banded self-excited component and a broad-banded buffeting component, the Least Squares Method is applied to find the values of the flutter derivatives that minimise the difference between the self-excited portion of the aerodynamic forces and the mechanical forces associated with the motion. As an example, the procedure is applied to the evaluation of the flutter derivatives of the Sunshine Skyway Bridge deck.
Evaluation of bridge flutter derivatives from the wind excited vibration of section models
RICCIARDELLI, Francesco d'Assisi;
2002
Abstract
A procedure for the evaluation of bridge flutter derivatives is presented, based on the results of forced vibration wind tunnel tests on section models. Under the assumption that the total aerodynamic force is the sum of a narrow-banded self-excited component and a broad-banded buffeting component, the Least Squares Method is applied to find the values of the flutter derivatives that minimise the difference between the self-excited portion of the aerodynamic forces and the mechanical forces associated with the motion. As an example, the procedure is applied to the evaluation of the flutter derivatives of the Sunshine Skyway Bridge deck.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
