Damping analysis of cylindrical composite structures with enhanced viscoelastic properties

Mathias Kliem*, Jan Becker Høgsberg, Joachim Vanwalleghem, Angelos Filippatos, Stefan Hoschützky, Edith-Roland Fotsing, Christian Berggreen

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

Constrained layer damping treatments are widely used in mechanical structures to damp acoustic noise and mechanical vibrations. A viscoelastic layer is thereby applied to a structure and covered by a stiff constraining layer. When the structure vibrates in a bending mode, the viscoelastic layer is forced to deform in shear mode. Thus, the vibration energy is dissipated as low grade frictional heat. This paper documents the efficiency of passive constrained layer damping treatments for low frequency vibrations of cylindrical composite specimens made of glass fibre-reinforced plastics. Different cross section geometries with shear webs have been investigated in order to study a beneficial effect on the damping characteristics of the cylinder. The viscoelastic damping layers are placed at different locations within the composite cylinder e.g. circumferential and along the neutral plane to evaluate the location-dependent efficiency of constrained layer damping treatments. The results of the study provide a thorough understanding of constrained layer damping treatments and an improved damping design of the cylindrical composite structure. The highest damping is achieved when placing the damping layer in the neutral plane perpendicular to the bending load. The results are based on free decay tests of the composite structure.
Original languageEnglish
JournalApplied Composite Materials
Volume26
Issue number1
Pages (from-to)85-113
Number of pages29
ISSN0929-189X
DOIs
Publication statusPublished - 2019

Keywords

  • Composite structure
  • Passive damping treatment
  • Filament winding
  • Vibration analysis
  • Function integration

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