本文選題：超大型油船　切入點(diǎn)：數(shù)學(xué)模型　出處：《大連海事大學(xué)》2015年碩士論文

【摘要】：隨著國(guó)際石油需求量的不斷增加,原油運(yùn)輸已經(jīng)成為世界貿(mào)易中的重要組成板塊。作為原油運(yùn)輸主力船型的超大型油船VLCC(Very Large Crude Oil Carrier),由于方形系數(shù)和慣性矩大,其操縱性異于一般船舶,受風(fēng)影響下的偏轉(zhuǎn)異常。一旦其發(fā)生事故造成原油泄漏,將會(huì)對(duì)海洋環(huán)境造成巨大的破壞。因此,對(duì)于VLCC操縱性的理論研究,已經(jīng)成為保障海上交通安全的一個(gè)重要組成部分。本文通過(guò)參考國(guó)內(nèi)外文獻(xiàn),在他人的研究基礎(chǔ)之上,采用MMG (Maneuvering Model Group)思想建立了包括橫搖在內(nèi)的較為完整和全面的四自由度超大型油船操縱運(yùn)動(dòng)數(shù)學(xué)模型,并利用MATLAB對(duì)其受風(fēng)和流等外界干擾影響的操縱性進(jìn)行仿真,通過(guò)深水和淺水旋回仿真實(shí)驗(yàn)與實(shí)船旋回實(shí)驗(yàn)的對(duì)比,驗(yàn)證了本模型的精度在仿真要求誤差范圍之內(nèi)。在所建立的模型基礎(chǔ)上,對(duì)不同載態(tài)下的VLCC在不同風(fēng)向、不同風(fēng)速和不同船速等工況進(jìn)行了保向仿真研究；對(duì)其受到不同風(fēng)速和不同流速影響下的旋回性等進(jìn)行了仿真研究,并計(jì)算出船舶在不同船速、不同風(fēng)速和不同流速等情況下的風(fēng)流壓差角。對(duì)仿真結(jié)果研究表明,VLCC在滿載平吃水時(shí),前進(jìn)中受到任何方向上的來(lái)風(fēng),船首均會(huì)向上風(fēng)偏轉(zhuǎn)；VLCC在壓載時(shí),正橫前受強(qiáng)風(fēng)且船速較低時(shí),船首將會(huì)向下風(fēng)偏轉(zhuǎn),正橫后受風(fēng)或者船速較高時(shí),船首將會(huì)向上風(fēng)偏轉(zhuǎn)。本論文的研究能夠讓船舶駕駛?cè)藛T更好的認(rèn)識(shí)VLCC的操縱特性,為實(shí)際操船提供相應(yīng)的指導(dǎo)。
[Abstract]:With the increasing international oil demand, crude oil transportation has become an important part of world trade.Because of the large square coefficient and moment of inertia, the VLCC(Very Large Crude Oil carrier, which is the main ship type of crude oil transportation, has different maneuverability from that of ordinary ships, and its deflection is abnormal under the influence of wind.Once the oil spill occurs, it will cause great damage to the marine environment.Therefore, the theoretical study of VLCC maneuverability has become an important part of maritime traffic safety.By referring to domestic and foreign literatures and on the basis of other people's research, this paper establishes a complete and comprehensive mathematical model of the maneuvering motion of a four-degree-of-freedom super large tanker, including rolling, by using the idea of MMG Maneuvering Model Group.The maneuverability affected by wind and current is simulated by MATLAB. The accuracy of the model is within the error range of simulation requirement through the comparison of deep water and shallow water cycle simulation experiment and real ship cycle experiment.On the basis of the established model, the direction-preserving simulation of VLCC under different load states under different wind direction, different wind speed and different ship speed is carried out, and the cyclicity of VLCC under the influence of different wind speed and velocity is studied.The angle of air flow pressure difference is calculated under different ship speed, different wind speed and different velocity.The simulation results show that when the VLCC is draught at full load, it is subject to wind in any direction during the course of its advance, and the bow will deflect to the upper wind when it is ballast, and when the wind is strong at the transverse front and the ship's speed is low, the bow will deflect downwind.When the wind is positive or the ship is high, the bow will deflect to the upper wind.The research in this paper can make the ship pilots better understand the handling characteristics of VLCC, and provide the corresponding guidance for the actual operation of the ship.
【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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相關(guān)期刊論文 前3條

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本文編號(hào)：1723718