Study on the Application of Viscoelastic Material in Sound Absorption Structure Model
Study on new absorption materials is important to the sound stealth of targets underwater. The simpler formulae of calculating multiple-layer absorption model is educed with transferring matrix. By numerical simulating, the relation between model’s acoustic characteristics and material parameters of each layer is provided.The study shows that a better performance is acquired when material Young’s modulus changed dynamically with frequency by a certain rule. On these basises, simulation contrast of the absorbing performances between styrene-butadiene rubber(SBR) and Spray Poiyurea Elastomer(SPUA) was carried out. The simulating result and the experiment provided that SPUA has good performance.
W. C. Zhang et al., "Study on the Application of Viscoelastic Material in Sound Absorption Structure Model", Advanced Materials Research, Vols. 217-218, pp. 341-346, 2011