本文選題：海冰 + 離散元　； 參考：《大連理工大學(xué)》2014年碩士論文

【摘要】：近年來(lái),隨著海洋油氣開發(fā)逐漸涉及到寒區(qū)領(lǐng)域,冰區(qū)海洋工程受到了越來(lái)越多的關(guān)注。海洋結(jié)構(gòu)在冰區(qū)能否安全工作在冰區(qū)工程上是首要關(guān)心的問題。為了保證冰區(qū)海洋結(jié)構(gòu)的安全性,需要對(duì)海洋結(jié)構(gòu)冰荷載及其影響因素進(jìn)行深入研究。 海冰與海洋結(jié)構(gòu)相互作用是一個(gè)十分復(fù)雜的過程。海冰參數(shù)如海冰的類型、強(qiáng)度、厚度、速度等及結(jié)構(gòu)參數(shù)如結(jié)構(gòu)形狀、尺寸、剛度等都會(huì)對(duì)這一過程產(chǎn)生重要影響。本文首先介紹了海洋結(jié)構(gòu)冰荷載研究的背景及涉及的主要問題,在實(shí)驗(yàn)研究、理論分析和數(shù)值模擬三個(gè)方面對(duì)國(guó)內(nèi)外海冰與結(jié)構(gòu)相互作用的研究情況進(jìn)行了總結(jié)。分析了海冰與直立體海洋結(jié)構(gòu)、錐體海洋結(jié)構(gòu)作用時(shí)的原理、形式、破壞機(jī)理等,對(duì)各結(jié)構(gòu)冰力特點(diǎn)進(jìn)行了說(shuō)明。在數(shù)值模擬方面,對(duì)離散元方法進(jìn)行了簡(jiǎn)要的介紹。 對(duì)海冰的物理力學(xué)性質(zhì)進(jìn)行了研究與總結(jié),分析了海冰密度、溫度、鹽度和鹵水體積等參數(shù)對(duì)海冰力學(xué)性質(zhì)的影響以及海冰強(qiáng)度參數(shù)如壓縮強(qiáng)度、彎曲強(qiáng)度及剪切強(qiáng)度對(duì)海冰動(dòng)力過程的作用。 在明確海冰物理力學(xué)性質(zhì)的前提下,建立了海冰離散元模型,闡述了海冰離散元的基本原理。給出了海冰離散元的接觸模型、粘結(jié)模型、斷裂模型、水動(dòng)力模型等海冰力學(xué)模型和結(jié)構(gòu)模型如柱體單元、錐體單元和三角形單元。 運(yùn)用海冰離散元模型,對(duì)漢堡冰池的錐體實(shí)驗(yàn),Jz20-2MUQ平臺(tái)抗冰錐與平整冰與相互作用過程,及平整冰與船體相互作用的過程進(jìn)行了數(shù)值模擬。分析討論了海冰厚度、速度及溫度對(duì)冰力結(jié)果的影響。通過對(duì)漢堡實(shí)驗(yàn)的模擬,對(duì)實(shí)驗(yàn)結(jié)果與計(jì)算結(jié)果進(jìn)行了對(duì)比,驗(yàn)證了計(jì)算結(jié)果的準(zhǔn)確性。通過對(duì)破冰船的模擬,論證了海冰離散元方法用于復(fù)雜海洋結(jié)構(gòu)模擬的可行性。 最后,討論了海冰離散元方法在海冰荷載研究應(yīng)用中存在的問題。
[Abstract]:In recent years, with the development of offshore oil and gas gradually involved in the field of cold regions, more and more attention has been paid to marine engineering in ice regions. Whether the ocean structure can work safely in the ice area is the primary concern in the ice area engineering. In order to ensure the safety of ocean structure in ice area, it is necessary to study the ice load of ocean structure and its influencing factors. The interaction between sea ice and ocean structure is a very complicated process. Sea ice parameters such as sea ice type, strength, thickness, velocity and structural parameters such as structure shape, size and stiffness will have an important effect on this process. In this paper, the background and main problems of ice load research on marine structures are introduced, and the researches on the interaction between sea ice and structure at home and abroad are summarized in three aspects: experimental research, theoretical analysis and numerical simulation. The principle, form and failure mechanism of sea ice and straight ocean structure and conical ocean structure are analyzed, and the ice force characteristics of each structure are explained. In the aspect of numerical simulation, the discrete element method is briefly introduced. The physical and mechanical properties of sea ice are studied and summarized, and the density and temperature of sea ice are analyzed. The influence of salinity and brine volume on the mechanical properties of sea ice, and the effect of sea ice strength parameters such as compressive strength, bending strength and shear strength on the dynamic process of sea ice. The sea ice discrete element model is established and the basic principle of sea ice discrete element is expounded. The contact model, bond model, fracture model, hydrodynamic model and structural model of sea ice discrete element such as cylinder element, cone element and triangle element are given. The interaction between ice cones and flat ice and the interaction between flat ice and hull were simulated numerically on the Jz20-2MUQ platform of Hamburg ice tank. The effects of sea ice thickness, velocity and temperature on ice force are analyzed and discussed. Through the simulation of the Hamburg experiment, the experimental results are compared with the calculated results, and the accuracy of the calculated results is verified. Based on the simulation of icebreaker, the feasibility of sea ice discrete element method for complex ocean structure simulation is demonstrated. Finally, the problems existing in the application of sea ice discrete element method in the study of sea ice load are discussed.
【學(xué)位授予單位】：大連理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：P731.15;P75

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 曲月霞,王永學(xué),李志軍,李廣偉;作用于正倒錐結(jié)構(gòu)上冰力物理模擬試驗(yàn)研究[J];大連理工大學(xué)學(xué)報(bào);2001年02期

2 季順迎;狄少丞;李正;畢祥軍;;海冰與直立結(jié)構(gòu)相互作用的離散單元數(shù)值模擬[J];工程力學(xué);2013年01期

3 曲月霞,李廣偉,李志軍,王永學(xué);正倒錐體結(jié)構(gòu)上冰力譜分析實(shí)驗(yàn)研究[J];海洋工程;2001年03期

4 李志軍;;渤海海冰災(zāi)害和人類活動(dòng)之間的關(guān)系[J];海洋預(yù)報(bào);2010年01期

5 馮丹;陸朝榮;周山丹;;北極石油開發(fā)的爭(zhēng)奪與障礙[J];節(jié)能技術(shù);2009年04期

6 徐泳,孫其誠(chéng),張凌,黃文彬;顆粒離散元法研究進(jìn)展[J];力學(xué)進(jìn)展;2003年02期

7 季順迎;;非均勻顆粒材料的類固-液相變行為及本構(gòu)方程[J];力學(xué)學(xué)報(bào);2007年02期

8 王泳嘉;邢紀(jì)波;;離散元法及其在煤礦開采中的應(yīng)用(第1講)[J];煤礦開采;1993年02期

9 王泳嘉;邢紀(jì)波;;離散元法及其在煤礦開采中的應(yīng)用(第2講)[J];煤礦開采;1993年04期

10 季順迎,沈洪道,王志聯(lián),奚海莉,岳前進(jìn);基于Mohr-Coulomb準(zhǔn)則的黏彈-塑性海冰動(dòng)力學(xué)本構(gòu)模型[J];海洋學(xué)報(bào)(中文版);2005年04期

相關(guān)博士學(xué)位論文 前1條

1 許寧;錐體海洋結(jié)構(gòu)的冰荷載研究[D];大連理工大學(xué);2011年

，

本文編號(hào)：1987560