On modeling of surface wave fields in media with inhomogeneities
UDC
539.3/620.179.163Abstract
Peculiarities of the dynamic process at the surface of a rectangular parallelepiped, weakened by the cylindrical cavity, have been investigated. Diameter of the cavity, as well as the depth of its occurrence have been varied. Surface oscillations have been exited in the sample by impulse action. For the calculation of the wave field on the surface of the parallelepiped, weakened by the presence of the cavity, the package ANSYS has been applied. The possibility of determining the presence of a defect by parameters of the surface wave field has been examined. The method of image recognition has been used. By using this method, the recognition of the type of defect corresponds to the recognition of the type of the response function. In this case, there is a steady and unique dependence between the type of response function and the parameters of the defect structure. The series of computational experiments has been carried out. Experimental results demonstrated that there is a precise spatial distribution of images in the space of recognition depending on the defect of sample.
Keywords:
defect, nondestructive testing, surface wave fieldAcknowledgement
References
- Dervilis N., Choi M., Taylor S.G., Barthorpe R.J., Park G., Farrar C.R., Worden K. On damage diagnosis for a wind turbine blade using pattern recognition. J. of Sound and Vibration, 2014, vol. 333, iss. 6, pp. 1833-1850.
- Salazar A., Vergara L., Llinares R. Learning material defect patterns by separating mixtures of independent component analyzers from NDT sonic signals. Mechanical Systems and Signal Processing, 2010, vol. 24, iss. 6, pp. 1870-1886.
- Ismagilov I.R., Golenishchev-Kutuzov V.A., Kalimullin R.I., Migachev S.A., Khasanov A.A. Obnaruzhenie poverkhnostnykh i ob"emnykh defektov v metallakh lazerno-akusticheskim sposobom [Detection of surface and bulk defects in the metal laser-acoustic method]. Defektoskopiya [Defectoscopy], 2014, no. 6, pp. 16-24. (In Russian)
- Korkh Yu.V., Perov D.V., Yunkevich A.B. Obnaruzhenie podpoverkhnostnykh mikrodefektov metodom vysokochastotnoy akusticheskoy mikroskopii [Detection of sub-surface micro-defects by low-frequency acoustic microscopy]. Defektoskopiya [Defectoscopy], 2015, no. 4, pp. 19-33. (In Russian)
- Bocharova O.V. On inverse problems of identification the cavity in the elastic cylinder. IOP Publishing Journal of physics: conference series, 2014, vol. 490, no. 1, p. 012057. DOI:10.1088/1742-6596/490/1/012057
- Bocharova O.V., Lyzhov V.A., Andzhikovich I.E. Nekotorye osobennosti volnovykh poley na poverkhnosti tel, oslablennykh nalichiem defektov [Some features of wave fields on the surface of the body, weakened by the presence of defects]. Vestnik Yuzhnogo nauchnogo tsentra RAN [Bull. of the Southern Scientific Center RAS], 2013, vol. 9, no. 2, pp. 11-15. (In Russian)
- Bocharova O.V., Andzhikovich I.E., Vorovich E.I. K probleme issledovaniya poverkhnostnykh volnovykh poley s pomoshch'yu tonkoplenochnykh segnetoelektricheskikh datchikov [To study the problem of surface wave fields using thin-film ferroelectric sensors]. Vestnik Yuzhnogo nauchnogo tsentra RAN [Bulletin of the Southern Scientific Center RAS], 2015, vol. 11, no. 1, pp. 30-35. (In Russian)
- Sedov A.V. Modelirovanie ob"ektov s diskretno-raspredelennymi parametrami: dekompozitsionnyy podkhod [Simulation of discrete objects with distributed parameters: decomposition approach]. Moscow, Nauka Publ., 2010, 438 p. (In Russian)
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Copyright (c) 2015 Bocharova O.V., Sedov A.V., Andjikovich I.E., Kalinchuk V.V.
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