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TsAGI Science Journal

ISSN 印刷: 1948-2590
ISSN オンライン: 1948-2604

TsAGI Science Journal

DOI: 10.1615/TsAGISciJ.v41.i1.100
pages 109-118

VIBROACOUSTIC PROCESSES MODELING IN THE TURBOJET ENGINE AND OTHER POWER PLANT UNITS BASED ON FREQUENCY CHARACTERISTICS INVESTIGATION OF THE “ENGINE-MOUNTING-AIRFRAME” SYSTEM

V. S. Baklanov
Tupolev Design Bureau (Tupolev) 17, Tupolev Embankment, Moscow, 105005, Russia

要約

Vibroacoustic processes investigations in an air-gas duct and in several units of GTE and their comparison to vibration loading of the engine body show significant interplay between these two processes. This paper presents a calculation model of a multicoupled system, namely, an "engine-mounting-airframe" system. This model is developed on the basis of experimental investigations of the frequency characteristics of dynamic compliances and vibroacoustic conductivities of the engine body and of the airframe in attachment points. This model allows us to work out a set of algorithms for estimation of acoustic processes in a gas-air duct, of vibration characterictics of the power plant units (for example, plunger pumps), and of dynamic loading of the engine attachment points.


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