The 12th International Conference on Hydrodynamics
18 – 23 september 2016, Egmond aan Zee, The Netherlands
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MULTI-OBJECTIVE OPTIMIZATION FOR A SURFACE COMBATANT USING NEUMANN-MICHELL THEORY AND APPROXIMATION MODEL


Go-down ichd2016 Tracking Number 80

Presentation:
Session: Ship hydromechanics resistance VI
Room: Room 1
Session start: 16:00 Tue 20 Sep 2016

Xiaoyi Liu   dcwan@sjtu.edu.cn
Affifliation: Shanghai Jiao Tong University

Jianwei Wu   dcwan@sjtu.edu.cn
Affifliation: Shanghai Jiao Tong University

Decheng Wan   dcwan@sjtu.edu.cn
Affifliation: Shanghai Jiao Tong University


Topics: - Ship hydrodynamics resistance, propulsion, powering, seakeeping, manoeuvrability, slamming, sloshing, impact, green water

Abstract:

Hydrodynamic optimization of hull forms has drawn attention of both academia and industry during the development of shipbuilding industry and shipping business. An efficient potential flow theory based design optimization tool OPTShip-SJTU for ship hull form is presented in this paper, which is composed of three function modules: hull form deformation module, hydrodynamic performance prediction module and optimization module. Free-Form Deformation (FFD) method and Radial Basis Function (RBF) method are employed to modify the ship hull in global and local respectively. In order to reduce the cost of the optimization, which is always a challenging problem, a new hydrodynamic prediction tool based on Neumann-Michell (NM) theory and the approximation model is adopted. The high efficiency is illustrated by the application of OPTShip-SJTU to a surface combatant DTMB 5415. Wave resistance coefficients at three design speeds are minimized and a Pareto front of solutions is obtained. The optimal hulls are verified and analyzed by NM theory and a RANS-based CFD solver naoe-FOAM-SJTU. Numerical results confirm the availability and reliability of the OPTShip-SJTU.