INITIAL DEVELOPMENT OF A NONLINEAR MECHANICAL MODEL FOR THE MOMENT RESPONSE OF FREE-SURFACE ROLL STABILIZATION TANKS.
Abstract
The report outlines the development of a nonlinear mechanical model for the moments exerted on the ship by the fluid contained in the free-surface roll stabilization tank. Though it is not clear that the current model is the best that can be achieved, the correlation demonstrated in the report between the current mechanical model and experimental results is comparable with that obtained in the aerospace industry between experimental results for cylindrical tanks and the corresponding linear mechanical models utilized in control system analyses. The development of a mechanical model represents a pragmatic approach to the effects on the ship of the hydrodynamic phenomena under investigation, and cannot be as meaningful as a rigorous nonlinear hydrodynamic theory. Nevertheless, it is concluded that with some additional study the current mechanical model could turn out to be a very useful concept for rationalization of bench test data, and perhaps ultimately for the study of coupled ship-tank dynamics and optimization of tank design. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1966
- Accession Number
- AD0634731
Entities
People
- John F. Dalzell
Organizations
- Southwest Research Institute