Dynamic behaviour adaptation of lightweight structures by compressible constrained layer damping with embedded polymeric foams and nonwovens

Research output: Contribution to journalResearch articleContributedpeer-review

Abstract

Evanescent morphing in combination with an original concept of Compressible Constrained Layer Damping (CCLD) is a novel and promising approach for dynamic behaviour adaptation. The crucial component of the CCLD is a compressible intermediate layer with its thickness and material properties controlled by fluid actuation, enabling the adjustment of the damping and stiffness of the overall system. To estimate the potential of the CCLD, an analytical model was developed which describes the vibration behaviour of the overall structure, taking into account the compression-driven properties of the intermediate layer. The results confirm the principal correctness of the initial theoretical assumptions regarding the adaptive dynamic behaviour of structures with CCLD treatment. A significant vibration mitigation as well as a high adaptability of dynamic behaviour were observed, however, they show a complex dependence on the system configuration. Nevertheless, the developed analytical modelling approach can already be used for a preliminary system design. Besides the analysed polymer-based foams as the intermediate layer, nonwovens also exhibit compression-dependent shear properties and can therefore be used in CCLD. First preliminary investigations show that the damping performance is on average about ten times better than that of the polymeric foams.

Details

Original languageEnglish
Article number3490
Number of pages14
JournalApplied Sciences (Switzerland)
Volume9
Issue number17
Publication statusPublished - 23 Aug 2019
Peer-reviewedYes

External IDs

Scopus 85072248215
ORCID /0000-0003-2834-8933/work/142238212
ORCID /0000-0002-0110-3066/work/156812774
WOS 000488603600052

Keywords

Keywords

  • compressible constrained layer damping, semi-active damping adaptation, polymeric foams, adaptive vibration damping, evanescent morphing, nonwovens