8th European Workshop On Structural Health Monitoring (EWSHM 2016)
5-8 July 2016, Spain, Bilbao
Right Now in Bilbao 13:56 Thu 22
11:40 Wednesday 6. Jul - A3B
Guided wave-based inspection methodology for high speed train hollow axles
Abstract »This work proposes a hollow axle inspection approach based on guided wave phenomena in thick-walled cylindrical structures, for potential applications in high-speed train maintenance. The developed inspection procedure employs multiple rings of transducers permanently mounted at the bore of the axle which allow for selective scanning of the axle sections. To achieve an effective inspection of locations prone to the fatigue crack initiations i.e. surface underneath the wheel/gear seats and the geometrical transitions, near-field wave enhancement effect is explored and adopted. Changes in the local wave enhancement phenomenon, due to the ‘quasi-surface’ wave interaction with the outer diameter transition in the axle, are used as a signature of the on-surface defect. In addition to the wave enhancement effect analyses, the well-established guided wave damage localisation approach based on pulse-echo signals is incorporated in the inspection methodology. To validate the proposed procedure, a numerical model of a railway axle was investigated for different damage scenarios including various sizes and locations. Preliminary experimental work was also carried out on a thick-walled hollow cylinder with varying outer diameter using flexible Macro Fiber Composite transducers for guided wave generation.
AuthorsCheng, Li*Cheng, Li*
Dr. L. Cheng received his BSc degree in Applied Mechanics from Xi\'an Jiaotong University in 1984, DEA and Ph.D degrees from the Institut National des Sciences Appliquees de Lyon (INSA-Lyon), France in 1986 and 1989, respectively. He started his academic career in Laval University, Canada in 1992, rising from an assistant professor to Associate/Full Professor, before joining the Department of Mechanical Engineering, The Hong Kong Polytechnic University as a Professor in 2000. He became a Chair Professor in 2005 and the Head of Department from 2011 to 2014. He is also Director of Consortium for Sound and Vibration Research (CSVR). Dr. Cheng\'s published extensively, with over 350 publications including book/book chapters and journal/conference papers, receiving over 3000 citations. He is a fellow of the Acoustical Society of America, Acoustical Society of China, IMechE and the Hong Kong Institution of Engineers. He is also a member of IIAV. He currently serves as an Associate Editor for the Journal of Acoustical Society of America, Associate Editor of Structural Health Monitoring: an International Journal, and an editorial board member of the International Journal of Applied Mechanics, ACTA ACUSTICA Sinica, Chinese Journal of Acoustics as well as four other international journals. Dr. Cheng served as the Chair/Co-Chair and a scientific committee member for over 30 times in various international conferences, including the general Chair of the 46th International Congress on Noise Control Engineering (Inter-noise) and Chair of 14th Asia Pacific Vibration Conference. He also delivered plenary/keynote talks (over 15 times) in various international conferences.
Hong Kong Polytechnic University
852 Hong Kong
Hong Kong, ChinaZiaja, AleksandraZiaja, Aleksandra
Hong Kong polytechnic University
Hong Kong, China*Contact