CAJ | 학술논문

远洋金枪鱼围网渔船是一种中、高速的作业型船舶，加装球鼻艏并进行优化可以有效降低其兴波阻力。通过一种改造型值的球鼻艏变换方法，由球鼻艏的长度、宽度、高度及尖点高度参数直接生成用于CFD计算的船体型值，可以快速探讨球鼻艏对兴波阻力的影响。兴波阻力的计算采用Rankine源势流理论，运用试验设计方法生成球鼻艏参数对兴波阻力影响的响应面模型。该模型表明，各参数的影响是复杂且耦合的，难以呈现单调的规律性，且在不同航速下其影响规律也有差异。优化球鼻艏的过程选用结合响应面的快速优化方法，通过优化，发现传统的对单一设计航速的优化可能会出现在较低的服务航速下阻力增加的情形，而采用多个航速的阻力优化方法则在设计航速与服务航速下同时具有减阻节能效果。
원양금창어위망어선시일충중、고속적작업형선박，가장구비수병진행우화가이유효강저기흥파조력。통과일충개조형치적구비수변환방법，유구비수적장도、관도、고도급첨점고도삼수직접생성용우CFD계산적선체형치，가이쾌속탐토구비수대흥파조력적영향。흥파조력적계산채용Rankine원세류이론，운용시험설계방법생성구비수삼수대흥파조력영향적향응면모형。해모형표명，각삼수적영향시복잡차우합적，난이정현단조적규률성，차재불동항속하기영향규률야유차이。우화구비수적과정선용결합향응면적쾌속우화방법，통과우화，발현전통적대단일설계항속적우화가능회출현재교저적복무항속하조력증가적정형，이채용다개항속적조력우화방법칙재설계항속여복무항속하동시구유감조절능효과。
The pelagic tuna purse seiner is a medium-high speed fishery vessel. To reduce its wave resis?tance, an optimized bulbous bow is usually installed. In order to effectively investigate the bulb bow effect on the wave resistance, a bulb bow transformation method is developed in this paper, through which the bulb bow offsets are transformed into length, breadth, height, and fore-point height parameters and directly used in CFD calculation. The wave resistance is then solved with the Rankine source panel method. Using the method of experimental design, a response surface model of bulb bow parameter effect on wave resis?tance is generated. The response surface model indicates that the influences are rather complex, coupled and irregular, and the exact rules differ with speed. Finally, a fast optimization method based on the re?sponse surface is applied into the bulb bow optimization, and it is noticed that the optimal solution for the design speed could yield worse resistance performance under service speed, while the multi-speed optimi?zation method is more effective for the resistance reduction and energy saving under both design speed and service speed.