钢板桩码头在船舶撞击下的安全性分析

发布时间：2018-01-07 18:14

本文关键词：钢板桩码头在船舶撞击下的安全性分析　出处：《江苏科技大学》2015年硕士论文　论文类型：学位论文

【摘要】：改革开放以来,随着我国国民经济的持续高速发展,海洋运输业快速发展,与国外贸易量越来越大,船舶进出港频率提高,导致船舶撞击码头的事故经常发生,造成较大的经济损失和人员伤亡,带来的间接损失更是不可估量的,也给码头留下了安全隐患。板桩码头作为一种重要码头形式,具有造价便宜,结构简单,施工快速、方便,对复杂的地质条件适应性强等优点,而其中钢板桩重量轻,强度高,锁扣紧密,止水性好,沉桩容易,所以被广泛应用于大型深水码头工程中。目前在工程中,研究船与码头碰撞一般采用定性理论分析法、现场实测分析法和模型试验分析法,而有限元法才刚刚起步,但是由于定性理论分析结果较为粗糙,可能与实际情况相差较大,而现场实测分析及模型试验分析需要大量的人力、物力、财力,周期长且无法得到在各个时刻结构内部的变形及应力传递的情况。因此本文采用有限元法对钢板桩码头进行分析。本文首先介绍船与码头碰撞研究的国内外现状、船舶撞击力的计算理论、方法以及板桩墙计算方法,对土体材料非线性、桩-土接触非线性和碰撞过程非线性问题进行分析,详细介绍有限元模型建立过程中单元类型选择、材料选择、接触对定义和选择等问题。然后,采用有限元软件ANSYS建立数值分析模型,对钢板桩码头在自重以及后场堆货荷载作用下进行有限元分析,得到了对同类码头设计有重要参考价值结果。通过数值模拟分别计算在水平荷载作用位置、大小和角度以及回填土弹性模量E对码头钢板桩等效应力的影响,并拟合计算结果总结出一些规律。最后,采用ANSYS/LS-DYNA来研究船舶与钢板桩码头碰撞过程码头结构安全性。验证了在规范规定最大的速度撞击下码头结构的安全性,分析了撞击位置、船舶吨位、船舶速度、回填土弹性模量E对撞击力、钢板桩等效应力、胸墙压力以及土体吸收能量的影响,并将有限元计算的最大撞击力值与国内外经验公式计算值进行对比,总结出一些规律,从而为同类码头的设计和维修改造以及撞击力的研究提供理论参考依据。
[Abstract]:Since the reform and opening up, with China's sustained rapid economic development, the rapid development of marine transportation industry, more and more foreign trade and ship out of Hong Kong, the higher the frequency, the pier due to ship collision accidents often occur, resulting in large economic losses and casualties, indirect losses is immeasurable, also to the wharf. Left a security risk. The sheet pile wharf as an important form of wharf, has low cost, simple structure, quick construction, convenient, the advantages of the complex geological conditions of strong adaptability, and the steel sheet pile of light weight, high strength, good waterproof, tight lock, pile easily, so it is widely used in large scale deep water wharf project. In the project, research on ship collision with the pier by qualitative theoretical analysis, field measurement analysis method and model test and the finite element method has just started, but The qualitative analysis results are rough, may have large difference with the actual situation, and on-site analysis and model experiment analysis requires a lot of manpower, material resources, financial resources, transfer the deformation period is long and not available in the internal structure of each moment and stress. The sheet pile wharf is analyzed by finite element method this paper first introduces the research status quo. The collision between ship and pier at home and abroad, theoretical calculation of ship impact force, calculation method and sheet pile wall, the soil material nonlinear pile-soil contact nonlinearity and nonlinear collision problems are analyzed in detail, establish a finite element model selection, element type in the process of material selection, contact the definition and selection. Then, a numerical analysis model is established by finite element software ANSYS, the steel sheet pile wharf heaped load in weight and lower back The finite element analysis, the results have important reference value to the similar wharf design. Through numerical simulation, calculated the level of load position, size and angle and affect elastic modulus of E steel sheet pile wharf on equivalent stress fill, and fitting the calculation results summed up some rules. Finally, to study the ship and steel sheet pile pier collision safety of wharf structure by ANSYS/LS-DYNA. Verify the specification in maximum speed impact safety of wharf structure, analyzes the impact position, ship tonnage, ship speed, backfill elastic modulus E of impact force of steel sheet pile stress, soil stress and energy absorption effect of parapet, and value with the domestic and foreign empirical formula calculation values are compared to the maximum impact force of the finite element method, summed up some rules, so as to similar terminal design and maintenance and transformation of impact force The research provides a theoretical reference.

【学位授予单位】：江苏科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U656.112

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