Influence of design parameters of sound-absorbing structure on dynamic characteristics

When designing and modernizing existing sound-absorbing structures (SAS) of an aircraft engine (AE) made of polymer composite materials, an urgent task is to conduct computational and experimental studies of the influence of its design parameters on natural frequencies and waveforms to predict resonant phenomena in order to exclude them. In this paper, the height of the tubular panel of the SAS is selected as the investigated parameter. A modal analysis of the tubular panel of the SAS made of materials VPS–33 and VCU–39 was carried out. The influence of the height parameter on the natural frequencies and waveforms of the tubular panel of the SAS has been studied.