Application of vibroacoustic metamaterials for broadband vibration reduction on space structures (online)

* Presenting author
Day / Time: 23.03.2022, 15:20-15:40
Room: 57-05
Typ: Vortrag (strukturierte Sitzung)
Online-access: Bitte loggen Sie sich ein, damit weitere Inhalte sichtbar werden (bspw. der Zugang zur Onlinesitzung).

In this work, application of vibroacoustic metamaterials based on a local resonance effect has been investigated for the usage in launcher components on example of a conceptual cylindrical interstage to optimize their vibration transmission characteristics. For these applications the stopband behavior is desired in the frequency range up to 200 Hz and a broadband damping characteristics up to 500 Hz. Different designs of resonators have been considered to fulfill the requirements on high damping and low additional mass. In the preliminary design, three configurations of planar specimens made of carbon fiber reinforced polymers (CFRP) have been investigated numerically with the target out-of-plane frequency at 160 Hz. The results have been validated and one favored design selected for application on cylindrical component made of CFRP to represent a scaled interstage component of launcher. The desired vibration reduction behavior could be demonstrated in both simulation and experimental results, thus showing potential of vibroacoustic metamaterials for composite launcher components.