长江中下游浮码头系留趸船的柔性定位墩的结构受力特性研究及结构优化

发布时间：2018-03-31 14:13

本文选题：定位墩　切入点：船舶有效撞击能量　出处：《重庆交通大学》2014年硕士论文

【摘要】：随着船舶大型化的发展，，浮码头的趸船尺寸也在不断增大，传统的系留趸船的方式如锚链和撑杆系统难以满足大型趸船的定位要求。为提高浮码头泊位的靠泊能力，工程上采用定位墩结构形式来系留大型趸船。文章正是在这种背景下对定位墩进行了结构受力特性研究以及结构优化，主要内容如下：首先，结合长江中下游浮码头系留趸船的定位墩结构，在总结国内外对船舶-结构碰撞机理研究的基础上，采用外部碰撞机理中的Minosky理论解析法作为船舶-趸船-定位墩系统碰撞的分析方法，推导船舶有效撞击能量的简化计算公式。并研究船舶撞击不同高程时船舶撞击力与船舶有效撞击能量的关系。其次，依托芜湖市富航物流有限公司码头建设工程，运用ANSYS有限元分析软件建立了定位墩结构的简化数值模型，考虑结构自重、风荷载、水流力、船舶撞击力、船舶系缆力和船舶挤靠力的作用，并对以上几种荷载进行最不利作用效应组合，计算不同工况下定位墩结构的最大位移和各构件的内力值。根据各种工况下轴力、剪力和弯矩极值出现的位置，分析定位墩结构受力最薄弱的位置，并判断定位墩结构前后排钢管桩受力不均匀性。然后，结合定位墩结构受力最薄弱的位置和前后排桩受力不均匀的情况，对定位墩结构的钢斜撑提出两种优化方案，分别是针对钢斜撑的连接位置的优化和钢斜撑所采用材料的优化。通过对同一截面处前后排桩轴力、剪力和弯矩差值的分析，判断定位墩结构前后排桩受力不均匀性是否降低。最后，在对定位墩结构钢斜撑材料优化的基础上，对定位墩结构钢管桩提出桩径、桩距和桩数三种优化方案。计算不同桩径、不同桩距下的定位墩结构桩顶位移，绘出桩顶位移与桩径桩距的关系曲线，并在桩径和桩距优化的基础上，提出一种最佳的三根桩定位墩结构的优化方案，比较三根桩与四根桩的定位墩结构受力均匀性。
[Abstract]:With the development of large-scale ship, floating pier barge size is also increasing, the traditional way of mooring pontoon as anchor and pole positioning system can not meet the requirements of large barges. In order to enhance the Berthing Capacity of floating berths, used in engineering structure to large mooring pier positioning barges. This article is in this context the location of the pier structure stress characteristic study and structure optimization, the main contents are as follows:
First of all, combined with the positioning structure of floating dock pier downstream of Yangtze River mooring barges, at home and abroad on the basis of ship structure collision mechanism research, analysis methods as the ship collision - positioning system using Minosky - pontoon pier theoretical analysis of external collision mechanism in the simplified calculation formula is derived the effective impact energy. And the effect of ship impact force of different elevation and ship impact energy.
Secondly, relying on the rich city of Wuhu Aviation Logistics Limited company wharf construction project, a simplified numerical model of positioning pier structure using finite element analysis software ANSYS, considering the structural weight, wind load, water stress, impact force of ship, ship mooring force and ship breasting force, and the adverse effect of combination the above several load, internal force calculation of the maximum displacement position of pier structure under different conditions and various components of value. According to the various conditions of axial force, shear force and bending moment of extreme position appears, the force analysis of the weakest position pier location, and determine the location of steel pipe pile pier structure before and after the row of force is not uniform.
Then, combined with the positioning of pier structure of the weakest force and position of the front row piles is not uniform, the location of pier structure of steel bracing is proposed two optimization schemes are aimed at the steel bracing connection position and the optimization of steel bracing materials used by the optimization. The axial force on the pile before and after the same section, the analysis of shear and moment difference, judgment and positioning of pile pier structure stress uniformity can decrease.
Finally, in the positioning of the pier structure of steel bracing material optimization based on positioning of the pier structure of steel pipe pile of pile diameter, pile spacing and pile number optimization schemes. The calculation of different pile diameter, pile pier structure from positioning the top of the pile displacement, draw the displacement of pile top and pile diameter pile distance curve and in the foundation, pile diameter and pile spacing optimization, put forward an optimization plan of the best three pile pier structure comparison of location positioning, pier three piles and four piles of uniform stress.

【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U656.1

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