62000 DWT多用途船的船型优化

Hull Form Optimization for a 62000 DWT Multi-purpose Vessel

在母型船的基础上对一艘62000 DWT多用途船进行船型优化,以使其在设计吃水和结构吃水状态下获得更加优良的性能。分析母型船的船身压力和兴波,对压力梯度变化较大的区域变化船体局部几何形状;对艏部的进流角度和艉部的去流段长度进行优化,以降低兴波阻力和减小船艉的流动分离。使用Star ccm+对最终的优化线型进行计算,并与母型船的结果对比,结果表明,优化船型与母型船相比,在设计吃水和结构吃水的阻力下降明显,船身表面压力梯度分布和螺旋桨盘面处的伴流分布更为均匀,达到了优化目的。结构吃水状态下的模型试验表明,阻力数值计算结果准确。线型优化使得船型具有更优良的性能,达到能效指数的要求,满足节能减排的目标。

Based on the parent ship,a 62000 DWT multi-purpose ship was optimized to obtain better performance in design draft and scantling draft.The hull pressure and wave-making resistance of the parent ship were analyzed,and the local geometry was varied in the areas with large pressure gradient variations;the entrance angle at the bow and the length of the run body at the stern were optimized to reduce the wave resistance and the flow separation at the stern.The optimized ship was calculated by using Star ccm+and compared with the results of the parent ship.The results showed that the optimized ship significantly reduced the resistance at design draft and scantling draft compared with the parent ship,and the pressure gradient distribution on the hull surface and the wake distribution at the propeller disc were more uniform,achieving the optimization purpose.Model tests were also conducted at the scantling draft to verify the accuracy of the numerical calculation of the resistance.Hull form optimization makes the ship have better performance,meet the requirement of energy efficiency,and meet the goal of energy saving and emission reduction.