Diffraction of sound waves on a metal ring
DOI:
https://doi.org/10.15587/2312-8372.2016.85097Keywords:
caustic, aberration, wave size, concentration of sound waves, motive flow, diffractionAbstract
As the object of research, sensor unit as a multiphase mechanical construction in the operating conditions of hypersonic aircraft flight is exposed to actions of powerful external disturbances such as: ultra-high temperature – more than 2000 ºC, vibration, shock N-wave, acoustic penetrating radiation. Less harmful disturbances cause additional measurement errors of characteristics of the flight product. Clarification of the nature and origin in time and space of these errors is one of the most important tasks of navigation.
Precisely delineated investigated phenomenon enables combat the negative influence of external disturbing factors by passive, active or autocompensation methods depending on character of the sensor error – methodological or instrumental.
The obtained result confirms the presence of powerful and fluid motive flow with a spatial structure in a liquid-phase components of component base, which, in combination with generated sound waves form a zone of concentration of sound energy and, in accordance, development of three-dimensional turbulent fluid, and explains the emergence of areas of passive energy, in which is virtually absent turbulence.
The expected effect of an efficient fight against the negative impact of penetrating sound radiation is based on eliminating an effect of aberrations and forming a powerful energy zones (zones of caustic surfaces), technical implementation of which in each case may have its advantages and disadvantages.
References
- Gladkiy, V. F. (1969). The dynamics of the aircraft structure. Moscow: Nauka, 496.
- Mel’nick, V., Karachun, V. (2016). The emergence of resonance within acoustic fields of the float gyroscope suspension. Eastern-European Journal Of Enterprise Technologies, 1(7(79)), 39–44. doi:10.15587/1729-4061.2016.59892
- Karachun, V., Mel’nick, V., Korobiichuk, I., Nowicki, M., Szewczyk, R., Kobzar, S. (2016, February 26). The Additional Error of Inertial Sensors Induced by Hypersonic Flight Conditions. Sensors, 16 (3), 299. doi:10.3390/s16030299
- Mel’nick, V. N. (2007). Stress-strain state of suspension of floating gyroscope under acoustic loading. Problemi prochnosti, 1, 39–54.
- Pavlovskiy, M. A. (1986). The theory of gyroscopes. Kyiv: High School, 303.
- Fesenko, S. V., Shybetskiy, V. Y. (2016). The study of the behavior of cylindrical shell in the ultrasonic field. Intehrovani intelektualni roboto-tekhnichni kompleksy, 3, 61.
- Leporinskaya, L. P. (1967). Endurance aircraft structures with acoustic loads. Vynoslivost' aviatsionnyh konstruktsii pri akusticheskih nagruzkah, 218, 317–325.
- Vyaltsev, V. V., Horguan, V. G. (1961). Powerful low-frequency sound alarm. Journal of Acoustic Technologies, 3 (7), 377–378.
- Beliy, N. G., Pachando, A. V. (1965). On the acoustic loading of the fuselage of the aircraft IL-18 and its endurance cladding elements. Prochnost' i dolgovechnost' aviatsionnyh konstruktsii, 11, 4–57.
- Dayer, I.; In: Krendel, S. (1967). The vibrations of the spacecraft under the action of the rocket engine noise housing. Accidental fluctuations. Moscow: Mir, 192–211.
- Fox Williams, D. E.; In: Krendel, S. (1967). The noise of high-speed missiles. Accidental fluctuations. Moscow: Mir, 45–49.
- Grinchenko, V. T., Meleshko, V. V. (1981). Harmonic waves in elastic bodies. Kyiv: Naukova dumka, 283.
- Valeev, K. G., Kvitka, V. E. (1970). Determination of the stress state of the flat panels in the acoustic field of the exhaust jet. Prikladnaya mekhanika, VI (4), 39–43.
- Pavlovskiy, M. A., Petrenko, V. E. (1977). On the self-compensation girotahometrov errors in angular vibration base. Reports of the Academy of Sciences USSR. Series А, 8, 81–84.
- Nwe, T. T. et al. (2008). Application of an Inertial Navigation System to the Quad-rotor UAV using MEMS Sensors. Engineering and Technology, 42, 578–582.
- Woodman, O. J. (2007). An introduction to inertial navigation. Cambridge, 37.
- Le Manh Hung, V. (2009). Indoor Navigation System for Handheld Devices. Worcester, 198.
- Nasiri, S. A. (2004). Critical Review of MEMS Gyroscopes Technology and Commercialization Status. California, 8.
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Copyright (c) 2016 Володимир Володимирович Карачун, Вікторія Миколаївна Мельник, Сергій Вікторович Фесенко
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