On the question of studying the sound absorption properties of noise protection structures by numerical and physical experiments
Keywords:
sound absorption coefficient, Reissner-Mindlin model, numerical and physical experiment, proprietary softwareAbstract
One of the essential points of the acoustic design is the estimation of sound absorption materials. The work is aimed at elaborating the stages of evaluation methodology for absorption of noise protection structures in the numerical experiment using proprietary software. Evaluation of natural oscillations of the membrane film is based on the Reissner-Mindlin model. The evaluation of the acoustic pressure value at the measuring microphone is performed using the finite element method implemented by software Actran. The samples of double-resonant honeycomb structures prepared for physical experiments in an acoustic interferometer are used as physical samples. The work is performed under support of grant RFFR project № 14-38-50170 «Development of theoretical framework for assessing the absorption of double-resonant honeycomb structures based on experimental studies».References
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