1986 Volume 72 Issue 10 Pages 1575-1581
A study has been made of the effect of resin intermediate layer(core resin) on the damping characteristics of composit damping steel sheets (CDS). The efforts have been focussed on the following three points.
(1) Effect of mechanical characteristics of core resin on loss factor of CDS.
(2) Comparison of loss factors obtained by different method of measurement, i.e. the shape of test piece, the boundary condition, and method of acceleration.
(3) Relation between loss factor and sound pressure level in two dimensional material accelerated.
Above studies have resulted in the following four points.
(1) Adoption of CDS is effective countermeasure against vibration or noise.
(2) Loss factors obtained by different method of measurement will differ because of different mode of vibration.
(3) Materials which have different elastic moduli will vibrate in differnt mode, even if they have same shape and the order of resonance is same.
(4) Not only tanδ, but also elastic modulus of core resin is important mechanical characteristics to loss factor of CDS.
