船舶破舱后船体剩余强度研究与分析
发布时间：2019-04-15 22:52
【摘要】：在当前时代,随着经济全球化地迅猛发展,国际间经济联系愈加紧密。随着远洋船舶的大型化、船舶数量增多以及航速加快,航运业在全球经济往来中起到重要支撑作用越加突出。与之同时出现的是海上意外事故的增加,特别是船舶碰撞导致船体结构破损、货物损坏、人员伤亡,油品泄漏导致环境污染等严重后果。 一旦船舶发生碰撞破损或者搁浅后,一方面将导致船体结构的强度减弱；另一方面由于船体破损进水,导致船体的最终浮态和舷外水载荷发生变化。本文对船体强度的研究现状进行了研究,并对船舶极限强度的计算方法分类进行了对比分析。结合当下船舶碰撞事故多发的时代背景,有必要对破损船体剩余强度进行研究。 本文基于ANSYS有限元工程软件,按照《散货船共同结构规范》中的船舶有限元模型的建立要求,研究相关破损船体的强度与载荷的指标。通过有限元模拟船舶在几种典型的装载状态下,船舶破舱后各个主要构件的应力变化,达到对破损船体的剩余强度的研究与分析。模型船型将选取散货船为例,利用ANSYS建立非线性有限元舱段模型,模拟出散货船在特定的装载状态、舱段在不同的破口工况下,对所模拟舱段的关键节点、单元的应力与未破舱时的相应节点处的应力进行对比、分析与研究。按照压载、轻货满载、重货满载三种典型装载状态进行比较分析,结果表明重货满载和轻货满载由于装载货物密度的不同(密度比为3.0：0.8),重货满载状态下的货舱构件的应力会比轻货满载要大,其破口时应力更大,对船舶构件的影响更加危险；对比船舶在菱形破口、矩形破口、以及未破口情况下的各个主要构件的应力,结果显示船舶在同等破口面积下,具有尖角或者不规则形状的破口状态时,破口附近应力更为集中,对船体强度的损伤更大。根据分析的结果,希望能为散货船营运过程中遇到的问题能够起到一定的指导作用。
[Abstract]:In the current era, with the rapid development of economic globalization, international economic ties become more and more close. With the large-scale of ocean-going ships, the increasing number of ships and the speed of navigation, the shipping industry plays an important role in the global economic exchanges and plays an increasingly prominent role. At the same time, the increase of accidents at sea, especially the ship collision resulting in ship structure damage, cargo damage, casualties, oil leakage resulting in environmental pollution and other serious consequences. Once the ship is damaged or stranded, on the one hand, the strength of the hull structure will be weakened, on the other hand, the final floating state and outboard water load of the hull will change due to the damage of the hull into the water. In this paper, the research status of hull strength is studied, and the classification of calculation methods of ship ultimate strength is compared and analyzed. It is necessary to study the residual strength of damaged ship hull according to the times background of frequent collision accidents. Based on the ANSYS finite element engineering software and according to the requirements of the ship finite element model in the Code for Common structure of bulk carriers, the strength and load indexes of damaged hull are studied in this paper. In order to study and analyze the residual strength of damaged hull, the stress changes of the main components of ship are simulated by finite element method under several typical loading conditions. Taking bulk carrier as an example, the nonlinear finite element segment model is established by using ANSYS to simulate the key nodes of the simulated segment in the specific loading state and under different breakout conditions of the bulk carrier, and the key nodes of the simulated segment are simulated under different breakout conditions, and the nonlinear finite element segment model is established by using the finite element method (FEA). The stress of the element is compared with the stress of the corresponding node when the chamber is not broken, and the analysis and research are carried out. According to the three typical loading states of ballast, light cargo full load and heavy cargo full load, the results show that heavy cargo full load and light cargo full load are different due to different loading density (density ratio is 3.0 脳 0.8). The stress of cargo cabin component under full load condition of heavy cargo is greater than that of light cargo, and the stress is greater when breaking, and the influence on ship component is more dangerous. Comparing the stresses of the main components of the ship under diamond, rectangular and unbroken conditions, the results show that the ship has a sharp angle or irregular shape of the breakout under the same area of the break, and the results show that the ship has a sharp angle or an irregular shape of the breakout under the same breaking area. The stress in the vicinity of the break is more concentrated and the damage to the hull strength is greater. According to the results of the analysis, we hope to play a guiding role for the problems encountered in the operation of bulk carriers.
【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】：U661.43
本文编号：2458561
[Abstract]:In the current era, with the rapid development of economic globalization, international economic ties become more and more close. With the large-scale of ocean-going ships, the increasing number of ships and the speed of navigation, the shipping industry plays an important role in the global economic exchanges and plays an increasingly prominent role. At the same time, the increase of accidents at sea, especially the ship collision resulting in ship structure damage, cargo damage, casualties, oil leakage resulting in environmental pollution and other serious consequences. Once the ship is damaged or stranded, on the one hand, the strength of the hull structure will be weakened, on the other hand, the final floating state and outboard water load of the hull will change due to the damage of the hull into the water. In this paper, the research status of hull strength is studied, and the classification of calculation methods of ship ultimate strength is compared and analyzed. It is necessary to study the residual strength of damaged ship hull according to the times background of frequent collision accidents. Based on the ANSYS finite element engineering software and according to the requirements of the ship finite element model in the Code for Common structure of bulk carriers, the strength and load indexes of damaged hull are studied in this paper. In order to study and analyze the residual strength of damaged hull, the stress changes of the main components of ship are simulated by finite element method under several typical loading conditions. Taking bulk carrier as an example, the nonlinear finite element segment model is established by using ANSYS to simulate the key nodes of the simulated segment in the specific loading state and under different breakout conditions of the bulk carrier, and the key nodes of the simulated segment are simulated under different breakout conditions, and the nonlinear finite element segment model is established by using the finite element method (FEA). The stress of the element is compared with the stress of the corresponding node when the chamber is not broken, and the analysis and research are carried out. According to the three typical loading states of ballast, light cargo full load and heavy cargo full load, the results show that heavy cargo full load and light cargo full load are different due to different loading density (density ratio is 3.0 脳 0.8). The stress of cargo cabin component under full load condition of heavy cargo is greater than that of light cargo, and the stress is greater when breaking, and the influence on ship component is more dangerous. Comparing the stresses of the main components of the ship under diamond, rectangular and unbroken conditions, the results show that the ship has a sharp angle or irregular shape of the breakout under the same area of the break, and the results show that the ship has a sharp angle or an irregular shape of the breakout under the same breaking area. The stress in the vicinity of the break is more concentrated and the damage to the hull strength is greater. According to the results of the analysis, we hope to play a guiding role for the problems encountered in the operation of bulk carriers.
【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】：U661.43
【参考文献】
相关期刊论文 前2条
1 万正权,徐秉汉,朱邦俊;弹塑性板壳结构非线性有限元分析[J];船舶力学;1997年01期
2 祁恩荣,崔维成;破损船体极限强度非线性有限元分析[J];船舶力学;2005年05期
，本文编号：2458561
本文链接：https://www.wllwen.com/kejilunwen/chuanbolw/2458561.html
