甲板上浪属于一种强非线性的波体相互作用问题,现象十分复杂。近年来,甲板上浪导致的FPSO(浮式生产储运系统,Floating Production Storage Offloading)的船首甲板和上层建筑严重损坏事故时有发生,甲板上浪问题因此也越来越受到国内外研...甲板上浪属于一种强非线性的波体相互作用问题,现象十分复杂。近年来,甲板上浪导致的FPSO(浮式生产储运系统,Floating Production Storage Offloading)的船首甲板和上层建筑严重损坏事故时有发生,甲板上浪问题因此也越来越受到国内外研究人员的重视。文章回顾了关于甲板上浪问题研究的发展历程,介绍了国内外理论研究的最新进展,并对甲板上浪的研究趋势进行了展望。展开更多
以船舶数值仿真技术为依托,以高速计算能力为基础,结合船体几何重构与变形技术,并将其融入基于现代优化分析理论的设计流程,建立了一种全局流场优化驱动的船舶水动力构型设计新方法/模式,国际上称之为SBD(Simulation Based Design)技术...以船舶数值仿真技术为依托,以高速计算能力为基础,结合船体几何重构与变形技术,并将其融入基于现代优化分析理论的设计流程,建立了一种全局流场优化驱动的船舶水动力构型设计新方法/模式,国际上称之为SBD(Simulation Based Design)技术。该文系统介绍了该设计方法的概念内涵和关键技术,对国内外相关研究进展情况进行了总结和评述,并对后续发展趋势以及该方法在船型创新设计中的重要性进行了分析。展开更多
In order to reduce the resistance and improve the hydrodynamic performance of a ship, two hull form design methods are proposed based on the potential flow theory and viscous flow theory. The flow fields are meshed us...In order to reduce the resistance and improve the hydrodynamic performance of a ship, two hull form design methods are proposed based on the potential flow theory and viscous flow theory. The flow fields are meshed using body-fitted mesh and structured grids. The parameters of the hull modification function are the design variables. A three-dimensional modeling method is used to alter the geometry. The Non-Linear Programming(NLP) method is utilized to optimize a David Taylor Model Basin(DTMB) model 5415 ship under the constraints, including the displacement constraint. The optimization results show an effective reduction of the resistance. The two hull form design methods developed in this study can provide technical support and theoretical basis for designing green ships.展开更多
文章介绍了"探索一号"科考船船体改型设计及基于数值仿真方法(Simulation Based Design,SBD)的艏部线型优化设计。首先,依据总体设计要求,对原船艏部进行了加长并开展了线型设计,采用基于RANS的数值评估方法对改型前后船舶阻...文章介绍了"探索一号"科考船船体改型设计及基于数值仿真方法(Simulation Based Design,SBD)的艏部线型优化设计。首先,依据总体设计要求,对原船艏部进行了加长并开展了线型设计,采用基于RANS的数值评估方法对改型前后船舶阻力进行计算分析。在此基础上,采用SBD技术开展了艏部线型优化设计,以设计航速时的总阻力作为目标函数,FFD方法实现船体几何自动重构,利用粒子群优化算法对线型优化设计问题进行求解,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,航速12kns时模型总阻力减小了7.7%,剩余阻力系数减小了26.6%。展开更多
文摘甲板上浪属于一种强非线性的波体相互作用问题,现象十分复杂。近年来,甲板上浪导致的FPSO(浮式生产储运系统,Floating Production Storage Offloading)的船首甲板和上层建筑严重损坏事故时有发生,甲板上浪问题因此也越来越受到国内外研究人员的重视。文章回顾了关于甲板上浪问题研究的发展历程,介绍了国内外理论研究的最新进展,并对甲板上浪的研究趋势进行了展望。
文摘以船舶数值仿真技术为依托,以高速计算能力为基础,结合船体几何重构与变形技术,并将其融入基于现代优化分析理论的设计流程,建立了一种全局流场优化驱动的船舶水动力构型设计新方法/模式,国际上称之为SBD(Simulation Based Design)技术。该文系统介绍了该设计方法的概念内涵和关键技术,对国内外相关研究进展情况进行了总结和评述,并对后续发展趋势以及该方法在船型创新设计中的重要性进行了分析。
基金financially supported by the National P&D Program of China(Grant No.2016YFB0300700)the National Natural Science Foundation of China(Grant Nos.51779135 and 51009087)the Natural Science Foundation of Shanghai(Grant No.14ZR1419500)
文摘In order to reduce the resistance and improve the hydrodynamic performance of a ship, two hull form design methods are proposed based on the potential flow theory and viscous flow theory. The flow fields are meshed using body-fitted mesh and structured grids. The parameters of the hull modification function are the design variables. A three-dimensional modeling method is used to alter the geometry. The Non-Linear Programming(NLP) method is utilized to optimize a David Taylor Model Basin(DTMB) model 5415 ship under the constraints, including the displacement constraint. The optimization results show an effective reduction of the resistance. The two hull form design methods developed in this study can provide technical support and theoretical basis for designing green ships.
文摘文章介绍了"探索一号"科考船船体改型设计及基于数值仿真方法(Simulation Based Design,SBD)的艏部线型优化设计。首先,依据总体设计要求,对原船艏部进行了加长并开展了线型设计,采用基于RANS的数值评估方法对改型前后船舶阻力进行计算分析。在此基础上,采用SBD技术开展了艏部线型优化设计,以设计航速时的总阻力作为目标函数,FFD方法实现船体几何自动重构,利用粒子群优化算法对线型优化设计问题进行求解,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,航速12kns时模型总阻力减小了7.7%,剩余阻力系数减小了26.6%。
