Dan Li Rail Crack Monitoring Using Acoustic Emission Technique 9789811341298

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Автор: Dan Li
Название: Rail Crack Monitoring Using Acoustic Emission Technique
ISBN: 9789811341298
Издательство: Springer
Классификация:

Вероятность и статистика

Классическая механика

Волновая механика (вибрация и акустика)

Материаловедение

Испытания материалов

Техническая акустика и звукотехника

ISBN-10: 981134129X
Обложка/Формат: Soft cover
Страницы: 136
Вес: 0.26 кг.
Дата издания: 2018
Серия: Springer Theses
Язык: English
Издание: Softcover reprint of
Иллюстрации: 30 tables, color; 94 illustrations, color; 5 illustrations, black and white; xxviii, 136 p. 99 illus., 94 illus. in color.
Размер: 234 x 156 x 9
Читательская аудитория: General (us: trade)
Основная тема: Engineering
Ссылка на Издательство: Link
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Поставляется из: Германии
Описание: This thesis provides an innovative strategy for rail crack monitoring using the acoustic emission (AE) technique. The field study presented is a significant improvement on laboratory studies in the literature in terms of complex rail profile and crack conditions as well as high operational noise. AE waves induced by crack propagation, crack closure, wheel-rail impact and operational noise were obtained through a series of laboratory and field tests, and analyzed by wavelet transform (WT) and synchrosqueezed wavelet transform (SWT). A wavelet power-based index and the enhanced SWT scalogram were sequentially proposed to classify AE waves induced by different mechanisms according to their energy distributions in the time–frequency domain. A novel crack sizing method taking advantage of crack closure-induced AE waves was developed based on fatigue tests in the laboratory. The propagation characteristics of AE waves in the rail were investigated, and Tsallis synchrosqueezed wavelet entropy (TSWE) with time was finally brought forward to detect and locate rail cracks in the field. The proposed strategy for detection, location and sizing of rail cracks helps to ensure the safe and smooth operation of the railway system. This thesis is of interest to graduate students, researchers and practitioners in the area of structural health monitoring.
Дополнительное описание: Introduction.- Literature review.- Propagation features and source location.- Sizing of fatigue cracks.- Field monitoring of rail cracks.- Conclusions and future work.

Rail Crack Monitoring Using Acoustic Emission Technique, Dan Li