基于阻力图谱的船型参数敏感度分析

Sensitivity analysis of ship hull parameters based on resistance altas

目前,已定性掌握船舶主尺度及主要船型系数对船舶阻力性能的影响趋势,但各个船型参数对阻力性能的具体影响程度仍不明确。为了确定各船型参数对阻力数值的贡献率,基于泰洛系列剩余阻力系数图谱,通过回归分析法,利用Isight软件在不同航速下对棱形系数、排水量长度系数以及宽度吃水比进行对剩余阻力系数的敏感度分析。结果得出各参数对剩余阻力的敏感度指数,并验证了已知船型参数对阻力的影响趋势。结果表明,敏感度分析结果具有较高的可信度,对于船舶设计具有一定的指导意义。

At present, we have qualitatively grasped the trend of ship’s main scale and main ship hull coefficient on the ship’s resistance performance, but the specific influence degree of each ship hull parameter on resistance performance is still not clear. In order to determine the contribution rate of each ship hull parameter to the resistance value, based on Taylor’s series of residual resistance coefficient altas, through the regression analysis method, the residual coefficient of resistance was calculated using the Isight software at different speeds for sensitivity of the prismatic coefficient, the displace-ment length coefficient and the width draft ratio. The results obtained the sensitivity index of each parameter to the residual resistance, and verified the already known influence of the ship parameters on the resistance. The results show that the sensitivity analysis results have high credibility and have certain guiding significance for ship design.