Analysis of Wave Decay Characteristics of Viscoelastic Compliant Coating

점탄성 유동벽면의 파동 감쇠 특성 해석

  • ;
  • 정광효 (부산대학교 참단조선공학연구센터) ;
  • 전호환 (부산대학교 참단조선공학연구센터) ;
  • 이인원 (부산대학교 참단조선공학연구센터)
  • Published : 2006.12.01


Calculation was carried out for phase velocity and deformation wave decay in a layer of viscoelastic material fixed tightly on the solid substrate. Analysis has been performed regarding the inner structure of the wave, i.e., the proportions between the vertical and horizontal displacements and their profiles. The wave characteristics depend strongly on media compressibility factor. The effect of viscous losses on parameters of the main oscillation mode was studied in detail. Results were compared with the model of coating with local deformation. A new experimental approach was made in order to measure such wave properties of a compliant coating as the dependency of deformation wave velocity on frequency and decay factor was made. The method for estimation of coating parameters enabling the drag reduction in turbulent flow was then refined.


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