RECOVIB Tiny used on a Pedestrian Bridge in Tours, France
RECOVIB Tiny used on a Pedestrian Bridge in Tours, France
RECOVIB Tiny For Vibration Measurements
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 Wölfel 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.
RECOVIB Tiny For Vibration Measurements
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 Wölfel 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.
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).
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).
Mode shape Analysis:
Eigenmode no. 3: Bending mode, in horizontal transversal direction
Eigenmode no. 4: Bending mode, in vertical direction
The instrumentation campaign was able to identify the first four main resonances frequencies:
Rocking mode: 1,4 Hz
Torsional mode: 1,9 Hz
Bending mode (Horiz.): 3 Hz
Bending mode (vert.): 4 Hz
Mode shape Analysis:
Eigenmode no. 3: Bending mode, in horizontal transversal direction
Eigenmode no. 4: Bending mode, in vertical direction
The instrumentation campaign was able to identify the first four main resonances frequencies:
Rocking mode: 1,4 Hz
Torsional mode: 1,9 Hz
Bending mode (Horiz.): 3 Hz
Bending mode (vert.): 4 Hz
For the purpose of carrying out this vibratory analysis on the footbridge, Woelfel Engineering chose to use the new vibration recorder, the RECOVIB Tiny, an extremely practical device for a fast and efficient vibration diagnosis.
Its wireless technology and intuitive operation provides substantial time savings in the performance of the measurements.
The RECOVIB Tiny is the only range of vibration and shock recorders that allows several sensors to be used simultaneously in a synchronized manner, enabling the performance of modal analyses and operational deflection shape analyses on large structures such as this footbridge.
The RECOVIB Tiny is available exclusively in the UK from DC White Consulting Engineers.
For the purpose of carrying out this vibratory analysis on the footbridge, Woelfel Engineering chose to use the new vibration recorder, the RECOVIB Tiny, an extremely practical device for a fast and efficient vibration diagnosis.
Its wireless technology and intuitive operation provides substantial time savings in the performance of the measurements.
The RECOVIB Tiny is the only range of vibration and shock recorders that allows several sensors to be used simultaneously in a synchronized manner, enabling the performance of modal analyses and operational deflection shape analyses on large structures such as this footbridge.
The RECOVIB Tiny is available exclusively in the UK from DC White Engineering Consultants.
