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عنوان فارسی مقاله:
مطالعه موردی انتشار موج هدایت شده در یک ورق فولاد غوطه ور آب یک طرفه
عنوان انگلیسی مقاله:
Case study of guided wave propagation in a one-side water-immersed steel plate
سال انتشار : 2015
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مقدمه انگلیسی مقاله:
1. Introduction
Nondestructive evaluation (NDE) and structural health monitoring (SHM) of thin-wall structures using guided waves are based on the understanding of wave propagation and interactions within the structural waveguide [1–10]. Guided waves have been used for inspection in immersed structures, such as ship hulls, submarines and underwater pipes [11–16] with focuses on detecting structural discontinuities in such immersed structures. Nonetheless, using guided waves for evaluating plate surface condition change due to the presence of water is much less discussed. When a free plate is immersed in water, the guided wave propagation in the plate will be affected. The out-of-plane motion in the plate will transmit into the water through the plate–water interface [2]. The surrounding water provides a way for the guided wave energy to leak outwards from the plate known as leaky guided waves [2]. Compared to the guided waves in the free plate, the leaky guided waves in the immersed plate have different behaviors, such as mode shapes, wave speeds and attenuations [17–23]. Besides the leaky guided waves, there is another wave mode reported by Cegla et al. known as quasi-Scholte mode present in the immersed plate [21,22]. The authors studied the quasi-Scholte wave in a plate with both sides immersed in infinite fluid, where the plate is considered as a symmetrically loaded waveguide [21]. It is found the quasi-Scholte wave is dispersive at low frequencies and asymptotes to the nondispersive Scholte wave behavior at high frequencies [21]. Alsoat low frequencies the quasi-Scholte wave energy predominantly flows in the plate, while at high frequencies most of the energy is in the fluid [21]. This paper presents an experimental investigation of the case of guided waves including the quasi-Scholte wave in a plate with only one side immersed in water. The study is enabled by the time–space wavefield acquired by a scanning laser vibrometer and the use of 2D Fourier transform (FT) to convert the wavefield to the frequency–wavenumber representation, by which the characteristics of the guided wave modes as well as the quasi-Scholte mode can be easily identified and analyzed. The effects of water level on wave propagation are also investigated. The paper is organized as follows. Section 2 presents the theoretical prediction of guided wave propagation in the one-side water-immersed plate. Section 3 gives the experimental setup and the wave propagation characterization by the use of the 2D FT. The water level influence on wave propagation is also investigated by analyzing the traveling time of the wave signals. The paper is finally concluded with discussions in Section 4.
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کلمات کلیدی:
Case study of guided wave propagation in a one-side water-immersed ... www.verticale.net/case-study-of-guided-wave-propagation-9038 water-immersed steel plate Lingyu Yu, Zhenhua Tian '' Department of ... a case study of guided waves in a steel plate with one side immersed in water. Full-Text XML - MDPI www.mdpi.com/1996-1073/10/5/589/xml Interface Wave Propagation Theory Rayleigh waves are one of the interface ..... study of guided wave propagation in a one-side water-immersed steel plate ... Images for propagation in a one-side water-immersed ... Image result for propagation in a one-side water-immersed steel plate Image result for propagation in a one-side water-immersed steel plate Image result for propagation in a one-side water-immersed steel plate Image result for propagation in a one-side water-immersed steel plate Image result for propagation in a one-side water-immersed steel plate Image result for propagation in a one-side water-immersed steel plate Image result for propagation in a one-side water-immersed steel plate Image result for propagation in a one-side water-immersed steel plate More images for propagation in a one-side water-immersed steel plate Report images Ultrasonic Guided Wave Propagation through Welded Lap Joints - MDPI www.mdpi.com/2075-4701/6/12/315/pdf by A Jankauskas - 2016 - Related articles Dec 10, 2016 - 400 kHz frequency for 1 mm thickness stainless steel plate. ...... study of guided wave propagation in a one-side water-immersed steel plate. Transducer finite aperture effects in sound ... - at www.arxiv.org. https://arxiv.org/pdf/1604.02258 by M Aanes - 2016 - Related articles 1. Transducer finite aperture effects in sound transmission near leaky Lamb modes in ... voltage-to-sound-pressure signal propagation through the electro-acoustic ... water-embedded steel plate, and the fluid regions at both sides of the plate [15-19]. .... “Normal incidence ultrasonic transmission through a water-immersed. [PDF]Leaky Guided Ultrasonic Waves in NDT - Imperial College London www3.imperial.ac.uk/pls/portallive/docs/1/50549700.PDF 2.2 Historical Background of Cylindrical Wave Propagation . ..... immersed in water and a steel plate that is water loaded on one side. (Solid lines = plate,.
