Torsional Vibration Analysis Using Rotational Laser Vibrometers
Torsional vibration is a critical phenomenon in rotor dynamics. It consists of an oscillating movement of the shaft and causes failures in multiple oscillating fields of application. This type of vibration is more difficult to measure than lateral vibration. Torsional vibrometers are generally invas...
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| Format: | Article |
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MDPI AG
2024-03-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/24/6/1788 |
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| author | Steven Chatterton Ludovico Dassi Edoardo Gheller Tommaso Ghisi Andrea Vania Paolo Pennacchi |
| author_facet | Steven Chatterton Ludovico Dassi Edoardo Gheller Tommaso Ghisi Andrea Vania Paolo Pennacchi |
| author_sort | Steven Chatterton |
| collection | DOAJ |
| description | Torsional vibration is a critical phenomenon in rotor dynamics. It consists of an oscillating movement of the shaft and causes failures in multiple oscillating fields of application. This type of vibration is more difficult to measure than lateral vibration. Torsional vibrometers are generally invasive and require a complicated setup, as well as being inconvenient for field measurements. One of the most reliable, non-invasive, and transportable measuring techniques involves the laser torsional vibrometer. For this research, two laser heads with different measurement capabilities were utilized. An experimental test rig was used to perform a relative calibration of the two laser vibrometers. The frequency of the acting force and the rotation speed of the shaft vary in the same range, which is commonly found in rotating machines. Finally, experimental measurements of torsional vibrations using laser vibrometers were compared with numerical results from a 1D finite element model of the same test rig. The main outcome of this paper is the definition of a reliable measuring procedure to exploit two laser vibrometers for detecting torsional mode-shapes and natural frequencies on real machines. The relative calibration of two different measuring heads is described in detail, and the procedure was fundamental to properly correlate measuring signals in two machine sections. A good correspondence between the numerical and experimental results was found. |
| first_indexed | 2024-04-24T17:50:38Z |
| format | Article |
| id | doaj.art-7ed8de3633594a61914a17112f70ca40 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-24T17:50:38Z |
| publishDate | 2024-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-7ed8de3633594a61914a17112f70ca402024-03-27T14:03:47ZengMDPI AGSensors1424-82202024-03-01246178810.3390/s24061788Torsional Vibration Analysis Using Rotational Laser VibrometersSteven Chatterton0Ludovico Dassi1Edoardo Gheller2Tommaso Ghisi3Andrea Vania4Paolo Pennacchi5Department of Mechanical Engineering, Politecnico di Milano, Via La Masa 1, 20156 Milan, ItalyDepartment of Mechanical Engineering, Politecnico di Milano, Via La Masa 1, 20156 Milan, ItalyDepartment of Mechanical Engineering, Politecnico di Milano, Via La Masa 1, 20156 Milan, ItalyDepartment of Mechanical Engineering, Politecnico di Milano, Via La Masa 1, 20156 Milan, ItalyDepartment of Mechanical Engineering, Politecnico di Milano, Via La Masa 1, 20156 Milan, ItalyDepartment of Mechanical Engineering, Politecnico di Milano, Via La Masa 1, 20156 Milan, ItalyTorsional vibration is a critical phenomenon in rotor dynamics. It consists of an oscillating movement of the shaft and causes failures in multiple oscillating fields of application. This type of vibration is more difficult to measure than lateral vibration. Torsional vibrometers are generally invasive and require a complicated setup, as well as being inconvenient for field measurements. One of the most reliable, non-invasive, and transportable measuring techniques involves the laser torsional vibrometer. For this research, two laser heads with different measurement capabilities were utilized. An experimental test rig was used to perform a relative calibration of the two laser vibrometers. The frequency of the acting force and the rotation speed of the shaft vary in the same range, which is commonly found in rotating machines. Finally, experimental measurements of torsional vibrations using laser vibrometers were compared with numerical results from a 1D finite element model of the same test rig. The main outcome of this paper is the definition of a reliable measuring procedure to exploit two laser vibrometers for detecting torsional mode-shapes and natural frequencies on real machines. The relative calibration of two different measuring heads is described in detail, and the procedure was fundamental to properly correlate measuring signals in two machine sections. A good correspondence between the numerical and experimental results was found.https://www.mdpi.com/1424-8220/24/6/1788torsional vibrationrotational laser vibrometerdynamic modelcalibration |
| spellingShingle | Steven Chatterton Ludovico Dassi Edoardo Gheller Tommaso Ghisi Andrea Vania Paolo Pennacchi Torsional Vibration Analysis Using Rotational Laser Vibrometers Sensors torsional vibration rotational laser vibrometer dynamic model calibration |
| title | Torsional Vibration Analysis Using Rotational Laser Vibrometers |
| title_full | Torsional Vibration Analysis Using Rotational Laser Vibrometers |
| title_fullStr | Torsional Vibration Analysis Using Rotational Laser Vibrometers |
| title_full_unstemmed | Torsional Vibration Analysis Using Rotational Laser Vibrometers |
| title_short | Torsional Vibration Analysis Using Rotational Laser Vibrometers |
| title_sort | torsional vibration analysis using rotational laser vibrometers |
| topic | torsional vibration rotational laser vibrometer dynamic model calibration |
| url | https://www.mdpi.com/1424-8220/24/6/1788 |
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