Вестник МГТУ. 2018, №4.

Вестник МГТУ. 2018. Т. 21, № 4. С. 632-637. DOI: 10.21443/1560-9278-2018-21-4-632-637 The defect in the observed area is characterized by the increased temperature T bmax . The defect can be localized in the spot of the surface area with the maximum excess temperature D T bmax ; the value D T bmax is found from the relation О 7 г,тах ( / ) - T bmax ( t ) - T 0 , where D T b max ( t ) - the change in the maximum temperature of the material layer back surface at the moment t ; T 0 - the initial (equilibrium) temperature of the back surface of the material layer. It can be seen in Fig. 4 that in the defect localization area the temperature evenly increases as the air comes through the penetration defect, after which the temperature value stabilizes. The time for setting the maximum temperature in the defect area depends on the parameters of the defect, the temperature, and the heating time of the front surface. The developed method enables to carry out tests in accordance with the non-equilibrium thermography in order to assess the thermophysical characteristics of the sealant and to detect defective areas in its volume. Acknowledgement The work has been carried out within the state assignment of the Russian Federation Ministry of Education and Science, project No. ГР АААА-А17-117041210284-1. References 1. Vlasov A. B., Mukhlaev V. A., Krishtopov A. I. Method for determining the sealant quality of cable pressure seals. Patent RF, no. 2659300. 2018. 2. Circuit installer's reference book. In 5 v. V. 5 / ed. G. I. Kitaenko. L. : Sudpromgiz, 1957. 575 p. 3. Ship electrical engineer's reference book. In 3 v. V. 3 / ed. G. I. Kitaenko. L. : Sudostroenie, 1980. 264 p. 4. Parker W. J., Jenkins R. J., Butler C. P., Abbott G. L. Flash method of determining thermal diffusivity, heat capacity, and thermal conductivity // Journal of Applied Physics. 1961. V. 32, Iss. 9. P. 1679-1684. DOI: https://doi.org/10.1063/1.1728417. 5. Vavilov V. P. Infrared thermography and heat control. M. : Spektr, 2009. 544 p. 6. Vlasov A. B. Models and methods of thermographic diagnostics for energy facilities. M. : Kolos, 2006. 280 p. 7. Vlasova S. V. Analysis of thermal processes in cables with rubber insulation based on quantitative thermography // Proceedings of the International research and practice conference, Murmansk, 2015. Murmansk : MSTU, 2015. P. 214-216. 8. Agarkov S. A., Vlasov A. B., Yudin Yu. I. The system of thermal imaging diagnostics for electrical and heat power equipment on ships and coastal infrastructure objects // Vestnik of Astrakhan State Technical University. Series: Marine Engineering and Technologies. 2016. N 3 (August). P. 66-74. 9. Shokina Yu. V., Shokin G. O., Vlasov A. B. Method for determination of thermal characteristics of the layer of granular media with elements of pulsed thermal NDT // Proceedings of the Voronezh State University of Engineering Technologies. 2015. N 1. P. 63-69. DOI: https://doi.org/10.20914/2310-1202-2015-1-63-69. 10. Vlasov A. B. Method of determining thermophysical characteristics of materials. Patent RF, no 2224245. 2003. 11. Vlasov A. B., Mukhin E. A. Method of thermal temperature control for windings of electrical machines. Patent RF, no 2216265. 2011. 12. Gaussorgues G. La Thermographie Infrarouge. Principes. Technologie. Applications. Paris : Lavoisier, 1984. Библиографический список 1. Способ определения качества герметика кабельных гермовводов : пат. 2659300 Рос. Федерация / Власов А. Б., Мухалев В. А., Криштопов А. И. № 2017134239 ; заявл. 02.10.2017 ; опубл. 29.06.2018, Бюл. № 19. 2. Справочник электромонтажника. В 5 т. Т. 5 / под общ. ред. Г. И. Китаенко. Л. : Судпромгиз, 1957. 575 с. 3. Справочник судового электротехника. В 3 т. Т. 3. Технология электромонтажных работ / под общ. ред. Г. И. Китаенко. 2-е изд., перераб. и доп. Л. : Судостроение, 1980. 264 с. 4. Parker W. J., Jenkins R. J., Butler С. P., Abbott G. L. Flash method of determining thermal diffusivity, heat capacity, and thermal conductivity // Journal of Applied Physics. 1961. V. 32, Iss. 9. P. 1679-1684. DOI: https://doi.org/10.1063/1.1728417. 5. Вавилов В. П. Инфракрасная термография и тепловой контроль. М. : Спектр, 2009. 544 с. 6. Власов А. Б. Модели и методы термографической диагностики объектов энергетики. М. : Колос, 2006. 280 с. 635