10.14489/td.2019.10.pp.058-063

2019, 10 October

DOI: 10.14489/td.2019.10.pp.058-063

Osadchy N. V., Zubov S. S., Shepel V. T.
VIBRATION STRENGTH MONITORING OF THE AVIATION GTE ACOUSTIC PANELS
(pp. 58-63)

Abstract. The vibration strength check of the acoustic panels installed inside the gas-air duct of the aviation engine was performed by computation of frequencies and natural modes of vibration, endurance strength and the amplification factor. The amplification factor characterizing the dynamic properties of vibration transmission was calculated in the laboratory conditions as a ratio of the vibration level on the examined panel installed on the vibration test rig similar to attachment on the engine to the vibration level on the vibration rig table. The natural frequency search was performed with the help of the ping-test and vibration mapping of the acoustic panels. Identification of the resonance frequencies was performed by means of strain-gaging. The amplification factor and the vibration acceleration on the engine casing enable to assess vibration acceleration of the panel under the resonant conditions during the panel operation on the engine. The panel performance under resonance was assessed by comparison of the actual vibration acceleration of the panel with the limit value obtained based on 107 cycles. In the process of design-experimental work the proposed approach enabled bringing the acoustic panels of the fifth-generation aircraft engine to compliance with the airworthiness requirements.

Keywords: acoustic panel, amplification factor, resonance, ping-test, vibration mapping, vibration acceleration, endurance strength.

+ - About the Authors Click to collapse

N. V. Osadchy, S. S. Zubov, V. T. Shepel (PJSC UEC-Saturn, Rybinsk, Russia) E-mail: Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра. , Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра. , Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра.

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