168ft大型游艇设计

介绍168ft大型游艇的设计理念、方法,对国外大型游艇主要参数进行分析,确定168ft豪华游艇主尺度,船模试验结果表明,采用扭曲轴包套推进效率提高显著,取得了5％～7％的节能效果,该游艇的设计效果达到了预期目标及定位。     

一种船体型线自动生成方法研究

以最小湿表面积为目标,提出用二次曲线和幂函数曲线来生成船体型线.在已知船舶主尺度、设计水线、中纵剖线、横剖面面积曲线等参数的前提下,利用二次曲线和幂函数曲线的特性,编写程序自动生成一套光顺的船体型线.试验对比表明,生成船与母型船的阻力性能几乎完全一样,证明了这种船体型线生成方法的可行性.     

Multi-objective optimization study on dimensions of medium-sized cruise ship in concept phase北大核心CSCD

［Objective］Aiming at the problem of too many influencing factors and too little reference data for determining the dimensions of medium-sized cruise ships in the concept phase, a simplified multi-objective optimization method based on the fitting of dimensions and performance is proposed. ［Method］First, the dimension relations of medium-sized cruise ships are analyzed and the influence of the latest SOLAS requirements used to determine the optimization range. Second, the influence of cruise ship dimensions on space, resistance, stability and seakeeping are analyzed. Next, based on the principles of genetic algorithms, a multiobjective optimization algorithm with high robustness and high engineering adaptability is determined to establish a multi-objective optimization model for the concept design of medium-sized cruise ships. Finally, the Pareto solution obtained by multi-objective optimization is analyzed to provide initial references for determining the dimensions of the target cruise ship. ［Results］Implemented via a genetic algorithm, the optimization program proposed herein is applied in the concept design of a medium-sized cruise ship in order to optimize the initial dimensions, thereby achieving the expected outcome of providing reasonable initial dimensions for cruise ship design. ［Conclusion ］ The proposed simplified multi-objective optimization model can provide feasible initial dimensions for medium-sized cruise ships in the concept phase. As the Pareto solution obtained by multi-objective optimization has different focuses such as resistance and stability, the most suitable solution needs to be selected according to the design object. © 2023 Chinese Journal of Ship Research. All rights reserved.