Constructive actions for decrease in acoustic loading in the assembly and protective block 81ks

Abstract

On the basis of the experimental works which are carried out in TsAGI laboratories necessary parameters of coefficients of mechanical losses, absorption coefficients, coefficients of distribution and sound insulation for composite samples with drawing on their surfaces of different sound-absorbing materials which have allowed to reduce loading on adaptable spacecraft to the total mean square level of the acoustic pressure which is not exceeding 140,6 dB are received. In work the rated scheme of research of decrease in acoustic loadings is given and comparison of theoretical and experimental data is given. Results of rated pilot studies have been confirmed with design tests of launch vehicle "Soyz-2".