数値流体力学による最適船型設計法の研究
要約
Ship Research Panel 229
Development of a Design System for Hull Form Optimization based on CFD
Summary
Conventional methods of hull form optimization usually rely on laborious work of tank tests, know-how of skilled engineers and design calculations besed on simple mathematical models, and they form a neck to be broken for efficient ship design. Recent progresses in information technology and computational methods of fluid dynamics lead to potential to establish integrated system of hull form optimization, which plays a functional role in the ship design and production system.
Aiming at establishment of hull form design system, which enables designers to give rational decision for hydrodynamics performance of ships, Ship Research Panel 229 has tackled the issues of constructing a new system for hull form optimization based on Computational Fluid Dynamics (CFD). The system was constructed breaking through following research subjects,
(1) Improvement of computational accuracy, computing time and robustness of CFD codes.
(2) Connection of hull form CAD with grid generation system of CFD
(3) Development of hull form optimization process by CFD and its interconnection with the hull form CFD.
(4) Improvement of data exchange process of hull form expression.
The CFD codes applied to the system includes prediction of resistance, propulsive performance and maneuverability and the CFD codes of resistance prediction, as an example, are combined with hull form optimization process.
The performance of the system has been tested by a trial design of hull form optimization. A full ship form is selected as a parent ship and is optimized to give a new hull form of minimum propulsive power. The result of tank test for both models of the parent and optimized ship forms gives conviction for availability of the system to hull form design and the system has been established as a prototype of The Simulation-Based Hull Form Design System.
