樹脂複合型制振鋼板のアーチの振動減衰に及ぼす曲率の影響

概要

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Loss factors for vibrating arches made of vibration damping steel sheets (VDSS), which are constructed in three layers with a constrained viscoelastic core layer, are predicted analytically. Thus derived vibration equations suggest that flexural motion couples with in-plane motion depending on the curvature of an arch and the vibration-damping effect caused by shear deformation of the viscoelastic core layer is influenced by the value of curvature. Numerical results for free vibration show several characteristics of the loss factor; i.e., the loss factor monotonously increases with the mode ratio which represents the ratio of the in-plane displacement to the flexural displacement. The mode ratio linearly increases with the square of the ratio of wave-length to the radius of curvature for simply supported arches. Meanwhile for arches fixed at both of their ends the mode ratio does not increase monotonously with the curvature. Experimental accelerance curves for VDSS arches with several arch heights are obtained and loss factors are estimated by half-value width. These results are compared with calculated results.
一般社団法人日本機械学会の論文
1991-10-25