Exploring vibration control strategies for a footbridge with time-varying modal parameters

13th International Conference on Motion and Vibration Control; 12th International Conference on Recent Advances in Structural Dynamics

Soria, Jose M.^1 ; Díaz, Ivan M.^1 ; Pereira, Emiliano^2 ; García-Palacios, Jaime H.^1 ; Wang, Xidong^1

Universidad Politécnica de Madrid, ETS Ingenieros de Caminos Canales y Puertos, Madrid

ES 28040, Spain^1

Universidad de Alcala, Escuela Politécnica Superior, Alcalá de Henares, Madrid

ES 28805, Spain^2

关键词: Control strategies;    Induced vibrations;    Saturation nonlinearity;    Stress-ribbon footbridges;    Temperature variation;    Tuned mass dampers;    Velocity feedback control;    Vibration control strategies;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/744/1/012170/pdf
DOI  :  10.1088/1742-6596/744/1/012170

来源: IOP

【 摘 要 】

This paper explores different vibration control strategies for the cancellation of human-induced vibration of a structure with time-varying modal parameters. The motivation of this study is an urban stress-ribbon footbridge (Pedro Gomez Bosque, Valladolid, Spain) that, after a whole-year monitoring, it has been obtained that the natural frequency of a vibration mode at approximately 1.8 Hz (within the normal range of walking) changes up to 20%, mainly due to temperature variations. Thus, this paper takes the annual modal parameter estimates (aprox. 14000 estimations) of this mode and designs three control strategies: a) a tuned mass damper (TMD) tuned to the aforementioned mode using its most-repeated modal properties, b) a semi-active TMD with an on-off control law for the TMD damping, and c) an active mass damper designed using the well-known velocity feedback control strategy with a saturation nonlinearity. Illustrative results have been reported from this preliminary study.