COMPARISON OF THEORY AND EXPERIMENT FOR SLAMMING OF A DUTCH DESTROYER
Abstract
A theoretical analysis and computa ion were made of the slamming (hydrodynamic) forces acting on a ship, based upon an exp rimental knowledge of the ship's rigid-body motions relative to the wave. These forc s are considered to be due to the time rate of change of fluid momentum and to buoyancy forces incident to immersion of the hull. In addition, a computation is made of the transient elastic response and associated hull girder stresses of the ship due to the total force exerted by the fluid on the ship. A comparison between the theoretical and measured stresses shows good agreement. Prior investigation has shown that large whipping stresses and motions occur in certain ships subject to slam by hydrodynamic forces. The analysis indicates that the magnitude of these stresses and motions is related to the immersion of the bow flare, whereas the empirical evidence indicates that for rough seas the magnitudes of the whipping stresses, for a ship of given length, are larger for ships with bow flare. For certain ships bow flare may be the most significant single source of hull girder stresses. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1962
- Accession Number
- AD0278386
Entities
People
- Ralph C. Leibowitz