【摘要】：計及多自由度運動的船舶斜航水動力預(yù)報對船舶航行安全具有重要意義。文章通過耦合求解船舶運動方程和雷諾平均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動船舶的粘性繞流場進行數(shù)值模擬。船舶動態(tài)平衡位置根據(jù)計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進行的模型試驗相同,通過比較數(shù)值計算結(jié)果和試驗值驗證了該方法的有效性。對船模在受約束和自由運動兩種狀態(tài)下的船舶運動和流場進行模擬,通過比較分析船舶升沉、縱傾和橫傾的影響。文中計算獲得的詳細流場細節(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動浮態(tài)變化的機理。
[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】： 浙江海洋大學船舶與海洋工程學院浙江省近海海洋工程技術(shù)重點實驗室;浙江海洋大學東海科學技術(shù)學院;中國船舶科學研究中心;
【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

【相似文獻】

相關(guān)期刊論文 前1條

1 李誼樂,劉應(yīng)中,繆國平;二階精度的VOF自由面追蹤方法及其應(yīng)用[J];船舶力學;1999年01期

，

本文編號：2233799