船舶與海洋結構物縱向下水直接計算法研究
本文選題:直接計算法 + 縱向下水; 參考:《華中科技大學》2016年碩士論文
【摘要】:船舶與海洋結構物下水過程是結構物建造安裝過程中較為復雜、危險的一個環(huán)節(jié),稍有不慎,可能會造成巨大的經濟損失甚至是人員傷亡。對下水過程的研究,有助于改進現有下水工藝,規(guī)避下水過程潛在的危險,校核下水過程中結構物的強度與穩(wěn)定性。本文按照水線面特征將船舶與海洋結構物劃分為孤立水線面和分離水線面結構物。針對這兩類結構物,提出了孤立水線面結構物縱向下水靜力學直接計算法、孤立水線面結構物縱向下水動力學直接計算法以及分離水線面結構物縱向下水動力學直接計算法。這三種方法統(tǒng)稱為船舶與海洋結構物縱向下水直接計算法。船舶與海洋結構物縱向下水直接計算法基于浮性與完整穩(wěn)性直接計算法和剛體動力學,采用通用商用有限元軟件ABAQUS作為分析平臺。直接計算法的意義在于:(1)將較為繁瑣的邦戎曲線繪制,流體載荷積分等工作轉化為常規(guī)的有限元建模操作;(2)將各類載荷直接施加到結構物的外表面單元上而無需作幾何外形的簡化近似;(3)可通過一次分析得到結構物縱向下水全過程的各個運動與力學成分。首先,將直接計算法應用在簡單算例中(方形駁船下水、Wigley數值船下水、導管架常規(guī)下水),并將分析結果與解析解進行對比。在此基礎上,將直接計算法應用在較為復雜的算例中(46000DWT油船下水、導管架自扶正下水),并統(tǒng)計各算例的分析時長。算例結果表明:直接計算法分析結果較為準確;能夠處理復雜結構形式以及先進下水方式的下水問題,分析效率較高。因此,本文提出的直接計算法為船舶與海洋結構物縱向下水分析提供了一種新的手段,具有潛在的工程實用價值。
[Abstract]:The launching process of ships and marine structures is a more complex and dangerous link in the process of building and installing structures. A little carelessness may cause huge economic losses or even casualties. The research on launching process is helpful to improve the existing launching process, avoid the potential danger of launching process, and check the strength and stability of structure in launching process. In this paper, ship and ocean structure are divided into isolated waterline surface and separated waterline surface structure according to waterline features. For these two kinds of structures, the direct calculation method of longitudinal hydrostatic of isolated waterline structure, the direct calculation method of longitudinal hydrodynamics of isolated waterline structure and the direct calculation method of longitudinal hydrodynamic of isolated waterline structure are proposed. These three methods are referred to as the direct calculation method of longitudinal launching of ships and marine structures. Based on the direct calculation method of floatability and integrity stability and rigid body dynamics, the general commercial finite element software ABAQUS is used as the analysis platform. The significance of the direct calculation method is that: 1) draw the more complicated Bonjon curve. Fluid load integration and other work are transformed into the conventional finite element modeling operation: (2) applying all kinds of loads directly to the external surface element of the structure without making a simplified approximate approximation of the geometric shape) the longitudinal structure can be obtained by one analysis. The motion and mechanical composition of the whole process of downward water. First of all, the direct calculation method is applied to a simple example. (the square barge launches a Wigley numerical ship, and the jacket is normally launched, and the analytical results are compared with the analytical solution. On this basis, the direct calculation method is applied to the launch of 46000DWT oil tanker in a more complicated example, and the jacket is launched from the straightening out, and the analysis time of each example is counted. The results of numerical examples show that the direct calculation method is more accurate and can deal with the launching problem of complex structure and advanced launching mode, and the analysis efficiency is high. Therefore, the direct calculation method proposed in this paper provides a new method for the longitudinal launching analysis of ships and marine structures, and has potential engineering practical value.
【學位授予單位】:華中科技大學
【學位級別】:碩士
【學位授予年份】:2016
【分類號】:U671.5
【參考文獻】
相關期刊論文 前10條
1 陳憶寧;陳剛;楊建民;李欣;江新偉;;超大型導管架下水過程實測研究[J];海洋工程;2014年06期
2 祁磊;孫寶龍;曹先凡;姚志廣;趙開龍;;導管架平臺海上安裝接口軟件Sacs2Abaqus設計[J];計算機輔助工程;2013年S2期
3 李輝;于輝;李學菊;任慧龍;;限制水域船舶縱向下水的動力學分析[J];中國造船;2009年04期
4 王文華;王言英;;船臺及船體各狀態(tài)參數對船舶下水運動的影響[J];中國造船;2009年03期
5 王文華;王言英;;基于CFD方法的船體下水水動力分析[J];大連海事大學學報;2009年03期
6 鐘駿平;程遠勝;劉均;曾廣武;;基于ANSYS的船舶縱向下水彈性計算方法[J];船舶力學;2007年05期
7 顧海軍;;導管架下水駁船簡介[J];船舶;2007年01期
8 ;Calculation of wave and current loads on launching offshore jacket[J];Journal of Marine Science and Application;2006年04期
9 程遠勝,游建軍;船舶坐墩墩木布局及尺寸優(yōu)化設計[J];船舶力學;2004年02期
10 何文剛;船臺改造及下水油脂探討[J];廣東造船;2000年04期
相關會議論文 前2條
1 祁磊;秦延龍;曹先凡;;基于ABAQUS的導管架滑移下水軟件[A];2010年度海洋工程學術會議論文集[C];2010年
2 何敏;李懷亮;吳子全;于文太;錢建偉;秦立成;;番禺30-1導管架下水和小孔注水自扶正分析及其在安裝中的應用[A];第十四屆中國海洋(岸)工程學術討論會論文集(下冊)[C];2009年
相關博士學位論文 前1條
1 張光發(fā);導管架下水運動三維數值模擬研究[D];大連理工大學;2007年
相關碩士學位論文 前4條
1 令波;浮性與完整穩(wěn)性的直接計算法[D];華中科技大學;2013年
2 黃奔;導管架下水過程數值模擬研究[D];大連理工大學;2010年
3 吳晶;船舶下水動態(tài)過程數值模擬分析研究[D];大連理工大學;2009年
4 俞銳;導管架下水技術[D];大連理工大學;2006年
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