Dr.. Vladimir V. Arabadzhi
Inst Applied Physics Russian
Aca Sci Ulianov st 46 Nizhny
Novgorod 603950.
RUSSIA
Fax: 7-(831)-436-59-76,
E-mail: v.arab@hydro.appl.sci-nnov.ru
Aca Sci Ulianov st 46 Nizhny
Novgorod 603950.
RUSSIA
Fax: 7-(831)-436-59-76,
E-mail: v.arab@hydro.appl.sci-nnov.ru
Abstract: The effect of resonant absorption of long waves by the oscillator of little gabarits is investigated analytically and numerically. This effect means that absorption cross-section of the oscillator (monopole, dipole...) is defined by wavelength absorbed only, and does not depend on wave dimensions (much smaller, than the wavelength absorbed) of the oscillator. The expression of optimum amplitudes of excitation of the group of degrees of freedom (or oscillators) in the boundary problem of general type is obtained in the form of generalized velocities and generalized forces. Using the linear microstructures (formed by monopoles, which are located on the axis periodically) we investigated the possibility to achieve the maximum absorption cross-section of the acoustic waves by these microstructures of small wave dimensions. We consider the examples of linear microstructures, which provide unlimited logarithmic, linear and square growing of the total absorption cross-section, with growing of the quantity of elements (monopoles) in the linear microstructure with wave dimensions remaining small. The examples of cooperative and the individual strategies of absorbing oscillators are compared too. The results obtained can be used for another waves: for electromagnetic waves, water surface waves, waves of bending in elastic plates, etc...
Plenary Speaker's Brief CV: ARABADZHI VLADIMIR VSEVOLODOVICH, physicist, researcher; born Minsk, Belarus, Apr. 22, 1956; s. Vsevolod Isidorovich Arabadzhi and Valentina Ivanovna Arabadzhi; m. Olga Alexeevna Vasil’eva, Aug. 11, 1979; child, Ludmila Vladimirovna. BS, Gorky State U., Russia, 1978, PhD in Radiophysics, 1994. Engr. Radiophys. Inst., Nizhny Novgorod, Russia, 1978-81; with Inst. Applied Physics, Russian Acad. Sci., Nizhny Novgorod, Russia, 1981-94, sr. scientist, 1994-. Contbr. Articles to profl. Jours. Achivements include inventions in active wave control. Area of interests: wave thrust, reducing of acoustical and radio visibility of physical bodies. Home: Lenin avenue 3/2 flat 85 Nizhny Novgorod 603011 Russia Office: Inst Applied Physics Russian Aca Sci Ulianov st 46 Nizhny Novgorod 603950. Fax: 7-(831)-436-59-76, E-mail:
