Mathematical model of acoustic characteristics of polyurethane foam used for sound absorption in aerospace engineering

Abstract

When solving the problem of reducing the acoustic load on the spacecraft during the launch and flight of the launch vehicle, finite element modeling of acoustic processes under the nose fairing is carried out. To successfully solve this problem, a mathematical model of the acoustic characteristics of the material used for sound insulation is required. The existing mathematical models of the acoustic characteristics of materials are not suitable for the material under consideration that can be used in rocket and space technology to increase the sound insulation of the payload fairing + transfer compartment assembly. To obtain the sound absorption coefficient of the material, an impedance tube measurement method with two microphones is used. Using the method of differential evolution, the coefficients of a mathematical model of acoustic characteristics of the Delany-Bazley type for the specified material are selected. The sound absorption coefficient obtained experimentally and that calculated using the obtained model are compared; the average and maximum values of the error are shown. The resulting model will make it possible to carry out finite element modeling of acoustic and vibroacoustic processes under the nose fairing, taking into account the location of the sound-absorbing material.

About the authors

A. V. Kuznetsov

Samara National Research University

Author for correspondence.
Email: al.vl.kuznetsov@mail.ru

Postgraduate Student of the Department of Power Plant Automatic Systems

Russian Federation

A. A. Igolkin

Samara National Research University

Email: igolkin97@gmail.com
ORCID iD: 0000-0001-7411-0534

Doctor of Science (Engineering), Professor of the Department of Power Plant Automatic Systems

Russian Federation

A. I. Safin

Samara National Research University

Email: artursafin1988@gmail.com
ORCID iD: 0000-0003-0936-4364

Candidate of Science (Engineering), Associate Professor of the Department of Power Plant Automatic Systems

Russian Federation

A. O. Pantyushin

Samara National Research University

Email: ao.pantyushin@mail.ru
ORCID iD: 0000-0003-0787-1063

Student

Russian Federation

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