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http://dx.doi.org/10.5050/KSNVE.2016.26.5.594

Distance Attenuation of Bending Wave to Analyze the Loose Parts Impact Signal  

Lee, Jeong-Han (ACT Co., Ltd.)
Park, Jin-Ho (Korea Atomic Energy Research Institute)
Publication Information
Transactions of the Korean Society for Noise and Vibration Engineering / v.26, no.5, 2016 , pp. 594-601 More about this Journal
Abstract
Mass estimation analysis of loose-parts in pressure vessel is necessary for the structural integrity assessment of pressure boundary in nuclear power plants. Mass of loose-parts can be generally estimated from the peak values and the center frequency of impact signals. Magnitude of impact signals is, however, inevitably attenuated according to the traveling distance of the signals and depending on the frequencies. Attenuation rate must be therefore carefully compensated for the precise estimation of loose-part mass. This paper proposes a new compensation method for the attenuation rate based on Bessel function instead of Hankel function in conventional method which has a limitation of usage in near the impact location. It was verified that the suggested compensating equation based on the Bessel function can be applied to the attenuation rate calculation without any limitation.
Keywords
Distance Attenuation; Bending Wave; Loose Parts; Mass Estimation; Hankel Function; Bessel Function;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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