發(fā)布時(shí)間：2018-09-10 07:36

【摘要】：計(jì)及多自由度運(yùn)動(dòng)的船舶斜航水動(dòng)力預(yù)報(bào)對船舶航行安全具有重要意義。文章通過耦合求解船舶運(yùn)動(dòng)方程和雷諾平均N-S方程,并采用VOF方法和高精度自由面捕捉技術(shù)對作多自由度斜航運(yùn)動(dòng)船舶的粘性繞流場進(jìn)行數(shù)值模擬。船舶動(dòng)態(tài)平衡位置根據(jù)計(jì)算出的力和力矩來決定,得到包括升沉、縱傾和橫傾在內(nèi)的船舶浮態(tài)。文中采用的算例與愛荷華大學(xué)進(jìn)行的模型試驗(yàn)相同,通過比較數(shù)值計(jì)算結(jié)果和試驗(yàn)值驗(yàn)證了該方法的有效性。對船模在受約束和自由運(yùn)動(dòng)兩種狀態(tài)下的船舶運(yùn)動(dòng)和流場進(jìn)行模擬,通過比較分析船舶升沉、縱傾和橫傾的影響。文中計(jì)算獲得的詳細(xì)流場細(xì)節(jié)特征,包括前體和舭部的渦以及船體表面上的壓力,有助于理解船舶斜航運(yùn)動(dòng)浮態(tài)變化的機(jī)理。
[Abstract]:The prediction of ship's oblique hydrodynamic force considering the motion of multiple degrees of freedom is of great significance to the safety of ship navigation. In this paper, the ship motion equation and Reynolds average N-S equation are solved by coupling method, and the viscous flow field around the ship with multiple degrees of freedom is numerically simulated by using the VOF method and the high precision free surface capture technique. According to the calculated force and moment, the dynamic equilibrium position of the ship is determined, and the floating state of the ship including heave, trim and roll is obtained. The numerical examples are the same as the model tests carried out by the University of Iowa. The effectiveness of the proposed method is verified by comparing the numerical results with the experimental results. The ship motion and flow field of ship model under two conditions of constrained and free motion are simulated and the effects of heave, trim and heeling are analyzed by comparison. The detailed characteristics of the flow field obtained in this paper, including the vortices of the precursor and bilge and the pressure on the hull surface, are helpful to understand the mechanism of the floating state change of the ship's oblique motion.
【作者單位】： 浙江海洋大學(xué)船舶與海洋工程學(xué)院浙江省近海海洋工程技術(shù)重點(diǎn)實(shí)驗(yàn)室;浙江海洋大學(xué)東�？茖W(xué)技術(shù)學(xué)院;中國船舶科學(xué)研究中心;
【基金】：Supported by National Natural Science Foundations of China(Grant No.51109186) Zhejiang Provincial Natural Science Foundations of China(Grant No.LY16E090004,LY14E090003) the Open Foundation from Key Laboratory of Marine Fishery Equipment and Technology of Zhejiang(MFET201401)
【分類號】：U661.1

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本文編號：2233799