铺设沥青甲板面的大型浮式码头力学响应研究

发布时间：2019-01-01 12:14

【摘要】：论文研究工作是基于浮体静力学、波浪理论和沥青材料粘弹性力学模型,提出一种海上浮式码头方案设计,在研究浮式码头静水力特性、浮态和稳性基础上,采用ANSYS结构有限元分析软件,计算分析组合工况下的浮式码头力学响应特性。论文研究内容是大型海上浮式码头设计的关键技术,它综合考虑了海上环境载荷、沥青甲板面载荷和甲板货物堆放载荷,把码头钢结构浮体和沥青甲板面作为整体系统来考虑,探索沥青铺设甲板面粘弹性材料对码头浮体结构的力学响应特性及影响规律,为海上浮式码头结构优化设计提供科学依据。论文主要研究内容如下： (1)研究海上浮式码头结构物静水力特性、自由浮态和漂浮稳性计算方法；确定线性波浪作为浮体的环境流体载荷,充分考虑浮体产生中拱和中垂工况。分析粘弹性材料基本特性,采用Maxwell模型作为沥青甲板面力学计算模型。研究ANSYS有限元分析软件在浮体结构板架和沥青甲板面的有限元建模、结构形式与单元表达、网格划分、载荷加载、模型约束等方面的应用方式。 (2)确定海上浮式码头主要尺度参数,提出浮式码头的总体分舱布置、基本结构设计方案；计算浮式码头的静水力曲线,分析其浮态和静力学特性；按照中国船级社规范要求,校核了不同载荷工况下的浮式码头初稳性高度。进行了浮式码头钢结构和沥青甲板面的有限元建模,以及钢结构单元和沥青粘弹性单元选择；确定浮式码头结构重量及分布、舱内载荷、甲板面载荷、静水载荷和波浪力载荷,以及计算系统的端部约束和力系平衡。 (3)分析浮式码头综合受力特点,确定浮式码头设计计算工况及对比分组；研究不同波浪高度对浮式码头组合工况的瞬时力学响应、不同沥青甲板面厚度对浮式码头组合工况的瞬时力学响应、码头堆放集装箱载荷对浮式码头组合工况的瞬时力学响应,以及浮式码头结构在长周期波浪载荷作用下的结构变形响应；分析计算结果,总结不同荷载对浮式码头结构受力、变形和运动响应规律。
[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.
【学位授予单位】：大连海事大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U656.117

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