Passive extraction of dynamic transfer function from arbitrary ambient excitations: Application to high-speed rail inspection from wheel-generated waves

被引：3
作者：
Di Scalea F.L. [1 ]
Zhu X. [1 ]
Capriotti M. [1 ]
Liang A.Y. [1 ]
Mariani S. [1 ,2 ]
Sternini S. [1 ]
机构：
[1] NDE and SHM Laboratory, Department of Structural Engineering, University of California, San Diego, San Diego, 92093-0085, CA
[2] Department of Mechanical Engineering, Imperial College, Exhibition Road, London
来源：
Journal of Nondestructive Evaluation, Diagnostics and Prognostics of Engineering Systems | 2018年 / 1卷 / 01期
关键词：
Inspection - Railroads - Transfer functions - Speed - Wheels - Railroad transportation;
D O I：
10.1115/1.4037517
中图分类号：
学科分类号：
摘要：
The general topic of this paper is the passive reconstruction of an acoustic transfer function from an unknown, generally nonstationary excitation. As recently shown in a study of building response to ground shaking, the paper demonstrates that, for a linear system subjected to an unknown excitation, the deconvolution operation between two receptions leads to the Green's function between the two reception points that is independent of the excitation. This is in contrast to the commonly used cross-correlation operation for passive reconstruction of the Green's function, where the result is always filtered by the source energy spectrum (unless it is opportunely normalized in a manner that makes it equivalent to a deconvolution). This concept is then applied to high-speed ultrasonic inspection of rails by passively reconstructing the rail's transfer function from the excitations naturally caused by the rolling wheels of a moving train. A first-generation prototype based on this idea was engineered using noncontact air-coupled sensors, mounted underneath a test railcar, and field tested at speeds up to 80 mph at the Transportation Technology Center (TTC), Pueblo, CO. This is the first demonstration of passive inspection of rails from train wheel excitations and, to the authors' knowledge, the first attempt ever made to ultrasonically inspect the rail at speeds above ∼30 mph (that is the maximum speed of common rail ultrasonic inspection vehicles). Once fully developed, this novel concept could enable regular trains to perform the inspections without any traffic disruption and with great redundancy. © 2018 by ASME.
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[1]  
Lokbis O.I., Weaver R.L., On the emergence of the green's function in the correlations of a diffuse field, J. Acoust. Soc. Am., 110, pp. 3011-3017, (2001)
[2]  
Roux P., Fink M., Green's function estimation using secondary sources in a shallow water environment, J. Acoust. Soc. Am., 113, 3, pp. 1406-1416, (2003)
[3]  
Derode A., Larose E., Tanter M., De Rosny J., Tourin A., Campillo M., Fink M., Recovering the green's function from field-field correlations in an open scattering medium, J. Acoust. Soc. Am., 113, 6, pp. 2973-2976, (2003)
[4]  
Weaver R.L., Lokbis O.I., Diffuse fields in open systems and the emergence of the green's function (L), J. Acoust. Soc. Am., 116, 5, pp. 2731-2734, (2004)
[5]  
Snieder R., Extracting the green's function from the correlation of coda waves: A derivation based on stationary phase, Phys. Rev. Lett. e, 69, 4, (2004)
[6]  
Roux P., Sabra K.G., Kuperman W., Roux A., Ambient noise cross correlation in free space: Theoretical approach, J. Acoust. Soc. Am., 117, 1, pp. 79-84, (2005)
[7]  
Sabra K.G., Roux P., Kuperman W.A., Emergence rate of the time domain green's function from the ambient noise cross correlation, J. Acoust. Soc. Am., 118, 6, pp. 3524-3531, (2005)
[8]  
Michaels J.E., Michaels T.E., Detection of structural damage from the local temporal coherence of diffuse ultrasonic signals, IEEE Trans. Ultrason. Ferroelectr. Freq. Control, 52, 10, pp. 1769-1782, (2005)
[9]  
Larose E., Lobkis O.I., Weaver R.L., Passive correlation imaging of a buried scatterer, J. Acoust. Soc. Am., 119, 6, pp. 3549-3552, (2006)
[10]  
Van Wijk K., On estimating the impulse response between receivers in a controlled ultrasonic model, Geophysics, 71, 4, pp. SI79-SI84, (2006)
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