Archives of Acoustics, Online first
10.24425/aoa.2024.148787

Modeling of Acoustic Coupling of Ultrasonic Probes for High-Speed Rail Track Inspection

Sławomir MACKIEWICZ
Institute of Fundamental Technological Research Polish Academy of Sciences
Poland

Zbigniew RANACHOWSKI
ORCID ID 0000-0003-2447-4705
http://www.acust.ippt.gov.pl
Institute of Fundamental Technological Research Polish Academy of Sciences
Poland

Tomasz KATZ
Institute of Fundamental Technological Research Polish Academy of Sciences
Poland

Tomasz DĘBOWSKI
Institute of Fundamental Technological Research Polish Academy of Sciences
Poland

Grzegorz STARZYŃSKI
Institute of Fundamental Technological Research Polish Academy of Sciences
Poland

Przemysław RANACHOWSKI
Institute of Fundamental Technological Research Polish Academy of Sciences
Poland

The paper presents the modeling of transmission of the ultrasonic plane wave through an uniform liquid
layer. The considered sources of the ultrasonic wave were normal (straight) beam longitudinal wave probes and angle beam sheer waves probes commonly used in non-destructive testing. Coupling losses (CL) introduced by the presence of the coupling layer are discussed and determined applying the numerical procedure. The modeling applies to both monochromatic waves and short ultrasonic pulses with a specified frequency bandwidth. Model implementation and validation was performed using a specialized software. The predictions of the model were confirmed by coupling losses measurements for a normal beam longitudinal wave probe with a delay line made of polymethyl methacrylate (PMMA). The developed model can be useful in designing ultrasonic probes for high-speed rail track inspections, especially for establishing the optimal thickness of the water coupling layer and estimation of coupling losses, due to inevitable changes of the water gap during mobile rail inspection.
Keywords: non-destructive testing; ultrasonic examination; plane wave propagation
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Copyright © 2023 The Author(s). This work is licensed under the Creative Commons Attribution 4.0 International CC BY 4.0.

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DOI: 10.24425/aoa.2024.148787