Optimum design of constrained layer damping panels

✍ Scribed by M.N. Darrouj; R.G. Faulkner

• Publisher: Elsevier Science
• Year: 1989
• Weight: 508 KB
• Volume: 10
• Category: Article
• ISSN: 0261-3069
• DOI: 10.1016/s0261-3069(89)80006-8

✦ Synopsis

Consideration is given to the design of constrained layer damping panels suitable for use in noise reduced diesel engine applications. It is shown that damping can be increased by reducing the thickness of the viscoelastic middle layer, reducing temperature or increasing the frequency. Variations of the thickness of the outer constraining layer lead to an optimum thickness depending on the elastic constants of the outer elastic layers and the dynamic shear constant for the viscoelastic layer. The mater/als of construction are discussed and suggested materials combinations for potentially high damping composite panels are recommended Magnesium is favoured for the elastic layers and polysulphide rubber and ethylene propylene rubber are suitable viscoelastic materials in selected ranges of temperature and frequency.