Effect of manufacturing technology for noise and vibration damping tools upon their physical, mechanical and acoustic parameters

Object and purpose of research. This paper discusses typical acoustic protection tools, like resilient mounts and sonar coatings. The purpose is to determine how manufacturing technology of acoustic protection tools affects their performance. Materials and methods. The study is based on the experiments intended to obtain physical, mechanical, operational and elastic-hysteresis properties of polyurethane material, as well as physical, mechanical and acoustic properties of acoustic protection tools manufactured as per various technologies. Main results. This research established the manufacturing technology effect of polyurethane compound upon the properties of elastomeric materials and acoustic protection tools made of it. Analysis of the results served to estimate pros and cons for each of the technologies under investigation in terms of their relevance with respect to advanced acoustic protection designs, as well as to estimate practicability of further studies in this direction. Conclusion. Dynamic shear modulus reduction of the material used in production of sonar coatigns and resilient mounts could be achieved through a technology where the components of polyurethane compound, prior to their use, are mixed (homogenized) separately without vacuum, which attracts additional air into them.