Vibroacoustics of aircraft with engines of a new generation (Problems and solutions)

Implementation by new generation aircrafts of future noise standards (Chapter 14 ICAO) for the protection of the environment requires a transition to a high bypass ratio engine of all types of trunk airplanes. The vibration and acoustic spectra of turbofan engines of a high bypass ratio are shifted to the low-frequency part of the sound spectrum. This is caused by a decrease in the rotation speed of the fan rotor and low-frequency components of the disturbing effect of the air-gas engine tract, which will determine the nature of airplane noise and vibroacoustic influence engines on the body and requires a new approach to the development of means for noise and vibration reduction.