ON RESISTANCE REDUCTION OF A HULL BY TRIM OPTIMIZATION

Brodogradnja

Lyu, Xujian¹  Tu, Haiwen²  Sun, Jianglong³  Xie, De³ 

[1] School of Energy and Power Engineering, Nanjing University of Science and Technology, Nanjing 210094, P. R. China, Hubei Key Laboratory of Naval Architecture and Ocean Engineering Hydrodynamics, Huazhong University of Science and Technology, Hubei, P. R.;School of Naval Architecture and Ocean Engineering, Huazhong University of Science and Technology, Hubei, P. R. China;School of Naval Architecture and Ocean Engineering, Huazhong University of Science and Technology, Hubei, P. R. China, Hubei Key Laboratory of Naval Architecture and Ocean Engineering Hydrodynamics, Huazhong University of Science and Technology, Hubei, P.

关键词: Trim optimization;    Wave resistance;    Panel method;    Response surface;   

DOI  :  10.21278/brod69101

学科分类：工程和技术（综合）

来源: Brodarski Institut

【 摘 要 】

The paper aims at conducting trim optimization for a hull to reveal the influence of trim on wave resistance by a potential-based panel method coupled with a response surface method. First, a numerical program for solving the linear free-surface flow problem of a hull moving with a uniform speed in calm water is built by the panel method. The S60 hull model is used to validate the numerical procedure. Next, calculation for hull is performed with two different trims at a wide range of Froude number; resistance test is conducted to validate the numerical method in demonstrating the influence of trim on wave resistance. Finally, a response surface of wave resistance is constructed with respect to variations of trim and Froude number, using the database of wave resistance calculated by the surface method. In this way, a framework is developed to perform trim optimization. The optimum trim point for the present hull shows a significant improvement in both wave resistance and total resistance, compared with that of even keel and the worst trim point. The optimization framework is proved to be effective in energy saving due to resistance reduction.

【 授权许可】

CC BY