發(fā)布時間：2019-01-01 12:14

【摘要】：論文研究工作是基于浮體靜力學、波浪理論和瀝青材料粘彈性力學模型,提出一種海上浮式碼頭方案設(shè)計,在研究浮式碼頭靜水力特性、浮態(tài)和穩(wěn)性基礎(chǔ)上,采用ANSYS結(jié)構(gòu)有限元分析軟件,計算分析組合工況下的浮式碼頭力學響應特性。 論文研究內(nèi)容是大型海上浮式碼頭設(shè)計的關(guān)鍵技術(shù),它綜合考慮了海上環(huán)境載荷、瀝青甲板面載荷和甲板貨物堆放載荷,把碼頭鋼結(jié)構(gòu)浮體和瀝青甲板面作為整體系統(tǒng)來考慮,探索瀝青鋪設(shè)甲板面粘彈性材料對碼頭浮體結(jié)構(gòu)的力學響應特性及影響規(guī)律,為海上浮式碼頭結(jié)構(gòu)優(yōu)化設(shè)計提供科學依據(jù)。 論文主要研究內(nèi)容如下： (1)研究海上浮式碼頭結(jié)構(gòu)物靜水力特性、自由浮態(tài)和漂浮穩(wěn)性計算方法；確定線性波浪作為浮體的環(huán)境流體載荷,充分考慮浮體產(chǎn)生中拱和中垂工況。分析粘彈性材料基本特性,采用Maxwell模型作為瀝青甲板面力學計算模型。研究ANSYS有限元分析軟件在浮體結(jié)構(gòu)板架和瀝青甲板面的有限元建模、結(jié)構(gòu)形式與單元表達、網(wǎng)格劃分、載荷加載、模型約束等方面的應用方式。 (2)確定海上浮式碼頭主要尺度參數(shù),提出浮式碼頭的總體分艙布置、基本結(jié)構(gòu)設(shè)計方案；計算浮式碼頭的靜水力曲線,分析其浮態(tài)和靜力學特性；按照中國船級社規(guī)范要求,校核了不同載荷工況下的浮式碼頭初穩(wěn)性高度。進行了浮式碼頭鋼結(jié)構(gòu)和瀝青甲板面的有限元建模,以及鋼結(jié)構(gòu)單元和瀝青粘彈性單元選擇；確定浮式碼頭結(jié)構(gòu)重量及分布、艙內(nèi)載荷、甲板面載荷、靜水載荷和波浪力載荷,以及計算系統(tǒng)的端部約束和力系平衡。 (3)分析浮式碼頭綜合受力特點,確定浮式碼頭設(shè)計計算工況及對比分組；研究不同波浪高度對浮式碼頭組合工況的瞬時力學響應、不同瀝青甲板面厚度對浮式碼頭組合工況的瞬時力學響應、碼頭堆放集裝箱載荷對浮式碼頭組合工況的瞬時力學響應,以及浮式碼頭結(jié)構(gòu)在長周期波浪載荷作用下的結(jié)構(gòu)變形響應；分析計算結(jié)果,總結(jié)不同荷載對浮式碼頭結(jié)構(gòu)受力、變形和運動響應規(guī)律。
[Abstract]:Based on the floating body statics, wave theory and viscoelastic model of asphalt material, a floating wharf scheme is proposed in this paper, which is based on the study of hydrostatic characteristics, floating state and stability of floating wharf. The mechanical response characteristics of floating wharf under combined working condition are calculated and analyzed by using ANSYS structure finite element analysis software. The research content of this paper is the key technology in the design of large floating wharf. It considers the environmental load, the load of asphalt deck and the load of cargo stacking on deck, and takes the floating body of steel structure and the deck surface of asphalt as the whole system. In order to provide scientific basis for the optimization design of floating wharf structure, the mechanical response characteristics and influence law of viscoelastic materials on asphalt deck to the floating structure of wharf are explored. The main contents of this paper are as follows: (1) the static and hydraulic characteristics of floating wharf structure, the calculation method of free floating state and floating stability are studied. The linear wave is determined as the environmental fluid load of the floating body, and the mid-arch and mid-sag conditions of the floating body are fully taken into account. The basic characteristics of viscoelastic materials are analyzed and the Maxwell model is used as the mechanical calculation model of asphalt deck surface. The ANSYS finite element analysis software is applied to the finite element modeling of floating-structure slabs and asphalt decks, structural form and element representation, mesh generation, load loading, model constraints, and so on. (2) determine the main scale parameters of floating wharf, put forward the general subdivision arrangement and basic structure design scheme of floating wharf, calculate the hydrostatic curve of floating wharf, analyze its floating and static characteristics; According to the code of China Classification Society, the initial stability height of floating wharf under different load conditions is checked. The finite element modeling of steel structure and asphalt deck surface of floating wharf and the selection of steel structure element and asphalt viscoelastic element are carried out. The weight and distribution of floating wharf structure, cabin load, deck surface load, hydrostatic load and wave force load, as well as the end restraint and force system balance of the calculation system are determined. (3) analyze the comprehensive force characteristics of floating wharf, determine the design calculation condition and contrast grouping of floating wharf; The instantaneous mechanical response of different wave height to floating wharf combination condition, different asphalt deck thickness to floating wharf combination condition, and the instantaneous mechanical response of container loading to floating wharf combination condition are studied. And the deformation response of floating wharf structure under long-period wave load; The results of calculation are analyzed, and the law of force, deformation and motion response of floating wharf structure under different loads is summarized.
【學位授予單位】：大連海事大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U656.117

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