【作者】 李胜忠； 蒋昌师； 倪其军； 赵峰；

【Author】 LI Sheng-zhong;JIANG Chang-shi;NI Qi-jun;ZHAO Feng;China Ship Scientific Research Center;

【机构】 中国船舶科学研究中心；

【摘要】 本文采用自由变形技术(FFD)实现船体表面几何的自动变形与重构,并将其与CFD数值评估技术和最优化理论相结合,建立了以高精度数值评估优化为特征的船型设计方法/模式。以阻力性能优异的3000T级船舶为设计对象,总阻力作为目标函数,采用粒子群优化算法(PSO)对船舶整体线型进行了自动优化设计,结果表明:在满足工程约束条件下,最优方案总阻力收益十分显著。之后,分别开展了设计方案与最优方案阻力模型试验,试验结果表明最优方案在设计航速时模型总阻力减小了6.3%,剩余阻力系数减小了14.5%;整个航速范围内,总阻力均有大幅减小,且与数值优化设计结果基本吻合,充分验证了文中使用的船型优化设计方法的可靠性和优越性。更多还原

【Abstract】 Automatic design optimization of ship hull-form has been realized by integrating CFD codes, optimization algorithms and geometry modification techniques. An example of the approach application for the 3000 T hull optimization is demonstrated. In the procedure, the Free-form Deformation method is chosen to automatically modify the geometry of ship, and the Particle Swarm Optimization(PSO) algorithm is adopted for exploring the design space. The objective function, the total resistance is assessed by RANS solvers. The optimization results show that the decrease of total resistance is significant for the optimization case in different speed. Finally, dedicated experimental campaigns for the design model and the optimized model have been carried out to validate the computations and establish the success of the optimization processes. At the design speed, the reduction of the total resistance in model scale is about 6.3% for the optimized case. This is a valuable result, considering the small modifications allowed and the good initial performances of the original model. The given design optimization example demonstrates the practicability and superiority of the proposed approach.更多还原