The Application of ML-SD 15 Vibration Damping Material to Two AN/SQS-23 Sonar Domes.

摘要

The ML-SD15 vibration damping formulation, a development of the Applied Science Laboratory, was successfully sprayed on to the bottoms and 'non-window' vertical surfaces of the interiors of two 360 inch sonar domes. On the basis of the experiences of the Laboratory with the vibration damping characteristics of viscoelastic materials, it is expected that the following advantages will be obtained by the application of the sprayable ML-SD15 material in lieu of the conventional sand-foam system: (a) Improved damping effectiveness - Improvement in sonar efficiency because of superior vibration damping characteristics of the ML-SD15 formulation, particularly over the frequency range from 3,000 cps to 11,000 cps, and because of the additional coverage achieved; (b) Lower cost - Substantial cost savings in application (approximately $1,000 per dome) and maintenance; (c) Improved water resistance; (d) Improved application procedures; (e) Flame Retardant - Self-extingushing characteristics; (f) Improved adhesion; and (g) Lower weight.