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- W2790286208 abstract "Aluminum carbody bolster is a key bearing structure of a high-speed EMU. It may suffer crack and corrosion damages from train operations. Those damages are detectable from guided wave-based ultrasonic technologies. In this paper, the case study of crack damage detection is performed by using a Lamb wave-based structural health monitoring (SHM) system in a carbody bolster. By applying the Hilbert transform technique to abstract the Lamb wave signal features, a damage index (DI) calculation method is proposed. In order to obtain an optimal DI result, the environmental parameter such as temperature has been studied and compensated in the diagnostics. A simple damage diagnostic technique combing with Hilbert Transform-based DI calculation, image method for damage localization is developed. An experimental study has been carried out in the laboratory by using a small actuator-sensor network bonded on the surface of a bolster structure. The structure is drilled with holes and saw cuts at the edge of holes for damage simulation. A calibration technique of crack size versus damage index was also presented." @default.
- W2790286208 created "2018-03-29" @default.
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- W2790286208 date "2017-09-28" @default.
- W2790286208 modified "2023-09-27" @default.
- W2790286208 title "Damage Diagnostic Techniques and Experimental Research of High-speed EMU Aluminum Carbody Bolster Based on Lamb Waves" @default.
- W2790286208 doi "https://doi.org/10.12783/shm2017/14200" @default.
- W2790286208 hasPublicationYear "2017" @default.
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