90 documents found, page 1 of 9

Modal decomposition of the dynamic response of wind turbine during one year of ...

The analysis of the dynamic behavior of wind turbines is a complex task. These structures present diverse configurations, dependent on the wind conditions. Consequently, the dynamic behavior is highly dependent on their operating conditions. This paper analyzes the dynamic behavior of a 2.0 MW wind turbine during 1 year of operation. In that sense, post-processing tools aiming to decompose the measured vibratio...

Vibration-based SHM of transportation and energy infrastructures

Dynamic Testing and Continuous Dynamic Monitoring of Transportation, Stadia and...

The Laboratory of Vibrations and Structural Monitoring (ViBest, www.fe.up.pt/vibest ) of CONSTRUCT/FEUP has been implementing, since 2007, a significant set of long-term dynamic monitoring systems in large Civil structures with different typologies (e.g. roadway, railway and pedestrian bridges, stadia suspension roofs, wind turbines, concrete dams or high voltage transmission lines). This paper briefly describe...

The analysis of the temperature effect on frequencies of a footbridge

The development of efficient vibration based structural health monitoring systems requires distinguishing between abnormal changes in modal parameters caused by structural damage and normal changes due to varying environmental conditions. In this context, this paper is focused on the analysis and extraction of effects of temperature oscillations on natural frequencies of a footbridge, where a long-term dynamic ...

Integrating Structural Health Monitoring Data in the Management of Infrastructures

Continuous dynamic monitoring programs of large Civil infrastructures

The Laboratory of Vibrations and Structural Monitoring (ViBest, www.fe.up.pt/vibest) of CONSTRUCT/FEUP has been implementing, since 2007, a significant set of long-term dynamic monitoring systems in large Civil structures with different typologies (e.g. roadway, railway and pedestrian bridges, stadia suspension roofs, wind turbines, concrete dams or high voltage transmission lines). This paper briefly describes...

Automated operational modal analysis of a lively footbridge for tracking long t...

A continuous dynamic monitoring system was installed at Pedro e Ines footbridge, located in Combra, Portugal, in 2007 by the CONSTRUCT/Vibest research group from the Faculty of Engineering of the University of Porto (FEUP). Such a system was further developed for research purpose by implementing an automated operational modal analysis procedure, in order to track the footbridge's long term dynamic properties an...

Continuous dynamic monitoring of large Civil infrastructures

This paper briefly describes a set of long-term dynamic monitoring programs developed by the Laboratory of Vibrations and Structural Monitoring (ViBest, www.fe.up.pt/vibest) of CONSTRUCT/FEUP in large Civil structures with different typologies (e.g. roadway, railway and pedestrian bridges, stadia suspension roofs, wind turbines, concrete dams or high voltage transmission lines), showing the interest and potenti...

Proposal of optimum tuning of semiactive TMDs used to reduce harmonic vibration...

Tuned mass dampers (TMDs) are a well-established technology for passive structural vibration control involving harmonic vibrations. Some design issues are critical to guarantee the proper functioning of the device, in particular, the adequate tuning and the adequate space to accommodate the TMD stroke. With regard to the first aspect, semiactive TMDs were proposed as an alternative means of correcting the vibra...

Dynamic identification and continuous dynamic monitoring of bridges: different ...

This paper aims at stressing the major role that Dynamic Identification and Continuous Dynamic Monitoring can play in the observation and understanding of the structural behaviour of bridges along the different phases of their life cycle, based on the authors' experience got at the Laboratory of Vibrations and Structural Monitoring (ViBest) of the University of Porto during the last 20years. The paper comprehen...