【摘要】：海上運(yùn)輸被認(rèn)為是最有效的交通運(yùn)輸方式之一。然而,隨著環(huán)保意識(shí)增強(qiáng)與預(yù)期的對(duì)碳排放的結(jié)構(gòu)調(diào)整,航運(yùn)業(yè)將被要求通過(guò)一切手段減少其對(duì)環(huán)境的影響。國(guó)際海事組織制定了自己的規(guī)則,要求截止2030年降低航運(yùn)業(yè)30%的碳排放量,因此所有新船將采用(能效設(shè)計(jì)指數(shù))EEDI,所有運(yùn)行中的船舶將使用能源效率管理計(jì)劃("SEEMP")。球鼻艏改造是應(yīng)對(duì)‘'SEEMP"船舶能源效率管理計(jì)劃關(guān)于運(yùn)營(yíng)船舶的解決方案之一。隨著預(yù)期的石油價(jià)格的上漲及對(duì)碳排放征收重稅的引進(jìn),目前迫切需要通過(guò)優(yōu)化一些特定的部分如球鼻艏及節(jié)能設(shè)備,重新設(shè)計(jì)運(yùn)行中的船舶,減小船舶阻力,以提高其工作效率。本文對(duì)通過(guò)優(yōu)化船體線(xiàn)型減小船舶阻力的方法進(jìn)行研究。所使用的優(yōu)化方法,應(yīng)用了與流體動(dòng)力(CFD)求解器Shipflow集成一體的Friendship-Framework的CAE平臺(tái),該仿真驅(qū)動(dòng)的優(yōu)化設(shè)計(jì)可以在廣泛的設(shè)計(jì)變量范圍內(nèi)對(duì)船體形狀作系列幾何變化,達(dá)到減少船舶阻力的目的。這個(gè)方法的有效性,將由一艘KVLCC2油船的優(yōu)化結(jié)果顯示。在球鼻艏優(yōu)化時(shí),可能出現(xiàn)濕表面面積增加的情況,這導(dǎo)致粘性阻力的增加,但是從船舶總阻力的降低結(jié)果可知,使用所化的優(yōu)策略依然是成功的�；诒驹O(shè)計(jì)的實(shí)例可見(jiàn),KVLCC2油船線(xiàn)型優(yōu)化方法對(duì)同類(lèi)船舶的線(xiàn)型優(yōu)化有參考價(jià)值。為優(yōu)化船舶線(xiàn)型,減小船舶阻力,采用了三個(gè)優(yōu)化階段。 (i)船尾部分修改,以產(chǎn)生最佳的新的船體;(ii)對(duì)球鼻艏進(jìn)行參數(shù)化優(yōu)化設(shè)計(jì)并添加于新的船體(來(lái)自于i階段),優(yōu)化生成一個(gè)新的球鼻艏船型。(iii)最后,使用切線(xiàn)搜索設(shè)計(jì)引擎(TSearch),根據(jù)B樣條曲線(xiàn)創(chuàng)建船體型值點(diǎn)的縱向移動(dòng),該B樣條曲線(xiàn)的頂點(diǎn)被第7章所描述的優(yōu)化算法控制,實(shí)現(xiàn)了對(duì)船體型線(xiàn)的優(yōu)化。優(yōu)化計(jì)算的結(jié)果清楚地顯示了總阻力減少了2.43%,同時(shí)波浪模式表明,發(fā)散波已經(jīng)顯著減少。
[Abstract]:Maritime transport is considered to be one of the most effective modes of transportation. However, with increased environmental awareness and expected structural adjustments to carbon emissions, the shipping industry will be required to do everything in its power to reduce its impact on the environment. The International Maritime Organization has its own rules for reducing the shipping industry's carbon emissions by 30% by 2030, so that all new ships will adopt the (Energy efficiency Design Index) EEDI, All ships in operation will use the Energy efficiency Management Plan ("SEEMP"). The bulbous bow modification is one of the solutions to the 'SEEMP' ship energy efficiency management plan. With the expected rise in oil prices and the introduction of heavy taxes on carbon emissions, there is an urgent need to redesign ships in operation by optimizing certain parts, such as bulbous bow and energy-saving equipment, in order to reduce ship resistance. To improve its working efficiency. In this paper, the method of reducing ship resistance by optimizing hull alignment is studied. The CAE platform of Friendship-Framework integrated with hydrodynamic (CFD) solver Shipflow is used in the optimization method. The simulation driven optimization design can make a series of geometric changes to the hull shape in a wide range of design variables. The purpose of reducing ship resistance is achieved. The effectiveness of this method will be demonstrated by the optimization results of a KVLCC2 tanker. When the bulbous bow is optimized, the wet surface area may increase, which leads to the increase of the viscous resistance. However, from the results of the reduction of the total resistance of the ship, it can be seen that the optimized strategy is still successful. Based on the example of this design, it can be seen that KVLCC2 tanker alignment optimization method has reference value for the same ship alignment optimization. In order to optimize ship alignment and reduce ship resistance, three optimization stages are adopted. The (i) stern part is modified to produce the best new hull; (ii) optimizes the bulbous bow and adds it to the new hull (from phase I), optimizes the generation of a new bulbous bow. (iii), and uses the tangent search design engine (TSearch), According to the B-spline curve, the longitudinal movement of the ship body value point is created. The vertex of the B-spline curve is controlled by the optimization algorithm described in Chapter 7, which realizes the optimization of the ship shape line. The results of the optimization calculation clearly show that the total resistance is reduced by 2.43, and the wave model shows that the divergence wave has been significantly reduced.
【學(xué)位授予單位】：大連海事大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：U674.133.1

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