RECOVIB Tiny in use on Tours bridge

Vibration Case Study RECOVIB Tiny used on a Pedestrian Bridge in Tours, France The footbridge at Tours In the city of Tours, in France, a new footbridge has been constructed. As part of commissioning, vibration measurements are carried out. By means of modal analysis, dynamic parameters up to 6 Hz of the footbridge are identified: Natural frequencies for all detected eigenmodes, Damping ratios for all detected eigenmodes, Mode shapes for all detected eigenmodes. To perform this, the company W?lfel Engineering uses the RECOVIB Tiny to measure the bridge vibrations. Thanks to RECOVIB Tiny, you no longer need to unwind metres of cables or install sophisticated wireless networks. A shaker system is used for excitation of the bridge structure with two different orientations: in horizontal lateral direction and in vertical direction. Nine RECOVIB Tiny are fixed to the bridge thanks to the magnets Several measurements were recorded for both shaker configurations on both bridge sides. Based on broad band excitation measurements vibration data is evaluated: mode shapes analysis are calculated and afterwards natural frequencies and damping ratios are identified using curve fitting procedures from experimental modal analysis (EMA).

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