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Information × Registration Number 0220U101440, 0117U000880 , R & D reports Title Dynamic strength of aerospaces and armored vehicles elements under mechanical load popup.stage_title Head Avramov Kostiantyn V., Доктор технічних наук Registration Date 11-02-2020 Organization A. Podgorny Institute of Mechanical Engineering Problems of the National Academy of Sciences of Ukraine popup.description2  The acoustic pressure levels acting on rocket carriers at start and in flight, as well as nonlinear torsional oscillations of the diesel generator power transmission are studied. As research methods, we used the calculations of the acoustic pressure levels in the one-third octave spectrum in programming language Maple; numerical simulation of a supersonic flow around a rocket carrier fairing; calculation of the generator nonlinear magnetic fields by the finite element method. The acoustic pressure levels acting on rocket carriers at various heights of their rise are calculated. The height of the rocket’s rise at which there has been the maximum level of acoustic loads is was determined. A method for calculating the power spectra of sound pressure has been developed. The turbulent boundary layer is calculated. An essentially nonlinear model of torsional oscillations with 16 degrees of freedom, which takes into account the presence of two non-linear clutches and gaps between gear wheels, is obtained. The results of numerical modeling are compared with experimental data. The results of numerical simulation of nonlinear torsional oscillations are presented. Product Description popup.authors popup.nrat_date 2020-04-02 Close