Train-Induced Vibration Monitoring of Track Slab under Long-Term Temperature Load Using Fiber-Optic Accelerometers
Abstract
:1. Introduction
2. Methods
2.1. Train-Induced Vibration Signal Acquisition System
2.2. Vibration Response Analysis Based on WPE
3. Field Test
4. Results and Discussion
4.1. Selection of Feature Frequency Band
- The significant frequency components in the spectra were spaced evenly, about 3.44 Hz, close to the integral multiple of the characteristic frequency (f4 = v/L4) induced by the center distance of two neighboring cars (25 m) of the CRH380AL train at the speed of 285 km/h;
- The characteristic frequency f2 caused by the center distance of the adjacent bogies between the forward car and the backward L2 (7.5 m) was about 10.3 Hz, consistent with the dominant frequency of three-fold of f4;
- The first dominant frequency was about 34.5 Hz, consistent with the characteristic frequency f1 caused by the wheelbase (2.5 m) and 10-fold of f4;
4.2. WPT Energy of Vibration Response with Temperature-Induced Deformation
5. Conclusions
Author Contributions
Funding
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Parameter | Value |
---|---|
Wavelet function | Daubechies 6 |
Sampling frequency (Hz) | 1000 |
Decomposition level l | 6 |
Number of packets 2l | 64 |
Frequency resolution of each packet (Hz) | 7.82 |
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Zhang, J.; Huang, W.; Zhang, W.; Li, F.; Du, Y. Train-Induced Vibration Monitoring of Track Slab under Long-Term Temperature Load Using Fiber-Optic Accelerometers. Sensors 2021, 21, 787. https://doi.org/10.3390/s21030787
Zhang J, Huang W, Zhang W, Li F, Du Y. Train-Induced Vibration Monitoring of Track Slab under Long-Term Temperature Load Using Fiber-Optic Accelerometers. Sensors. 2021; 21(3):787. https://doi.org/10.3390/s21030787
Chicago/Turabian StyleZhang, Jianxiang, Wenzhu Huang, Wentao Zhang, Fang Li, and Yanliang Du. 2021. "Train-Induced Vibration Monitoring of Track Slab under Long-Term Temperature Load Using Fiber-Optic Accelerometers" Sensors 21, no. 3: 787. https://doi.org/10.3390/s21030787
APA StyleZhang, J., Huang, W., Zhang, W., Li, F., & Du, Y. (2021). Train-Induced Vibration Monitoring of Track Slab under Long-Term Temperature Load Using Fiber-Optic Accelerometers. Sensors, 21(3), 787. https://doi.org/10.3390/s21030787