DEVELOP HANDBOOK AND SPECIFICATION FOR LOW LOSS (DAMPED) SHOCK AND VIBRATION ISOLATORS AND DIM PADS

The Navy has used for year in submarines, soft, resilient, high displacement, low natural frequency rubber type mounts. Reference NavSea 0900-LP-089-5010, 29 August, 1977, "Navy Resilient Mount Handbook and Specification" and Mil Spec #D-24709 (SH) "Dim Isolation Pads." However, today in submarines, where space is critical, more and more electronic cabinetry producing higher frequency signals that are critical, and life cycle cost of resilient mounts (sag, shift, and drift) is excessively high has created a requirement for low loss (damped) mount systems. There are many applications where the standard mounts do not do the job. DARPA recognized this problem over three years ago and issued an RFQ for developments of low loss (damped) mount systems. My information is that this was never awarded. There are standard damped mounts available from several manufacturers and literally hundreds have been used in submarines without a Mil Specification. It is proposed to develop an initial handbook of sizes and loads available, applicable to the Navy applications where a damped mount system is required. Also, to develop a Mil spec for these mounts.