VIBRATION DAMPING TREATMENTS FOR NEW CONSTRUCTION SUBMARINES
Abstract
Work continued on the investigation of vibration damping treatments for thick plates of submarines. It was found that the effect of temperature on the damping of the treatments utilizing chromated felt was due to the materials which were incorporated in the felt, rather than to the felt proper. Two unconstrained treatments were tested on 3/4 inch and 1-3/4 inch thick steel bars. One of these treatments, Type H, was a nitrile rubber vulcanizate. The other was a plastic compound, the main ingredient of which was a modified polyvinyl acetate. Higher average dampings over the frequency range between 50 and 2000-c were obtained at 85 deg F with 2 constrained chromated felt treatments, of a weight ratio of treatment to steel of 0.25, than with the 2 types of unconstrained treatments of 0.25 or 0.30 weight ratios. It was concluded that the 2 unconstrained treatments tried were not as satisfactory as the constrained felt treatments for damping thick plates on submarines.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 23, 1962
- Accession Number
- AD0273840
Entities
People
- J. Oser