冰载下舷侧加强结构强度快速校核方法研究

发布时间：2018-12-08 17:55

【摘要】：随着全球气温不断升高,北极冰川不断的融化,北极航道的通行趋于可行,加上丰富的石油资源,使得人们对北极的研究日渐升温。由于当前北极航线漂浮着许多海冰,航行于北极地区的船舶可能与海冰碰撞,冰船相互作用的撞击力可能会导致船体结构破坏,因此船体结构设计和强度校核需要考虑冰载荷下结构的承载能力。美国船级社ABS对于极地船舶的强度校核中,需要利用非线性有限元进行船体强度评估,评估过程耗时且需要建模工作量大。本文针对极地船舶舷侧加强结构进行强度校核方法的研究,研究工作内容如下。1.介绍了本文的研究背景,研究现状。同时,也介绍了美国船级社ABS的冰级指南中针对极地船舶结构强度校核的直接计算方法。2.研究了船体结构常见的四边刚性固定矩形板的塑性设计公式,在“双钻式”破坏模式的基础上,采用非线性有限元对该破坏模式下推导出来的塑性设计公式进行修正,并验证修正公式的适用性。3.根据得到的修正公式以及导出的矩形板弹性阶段的解析解,将它们用求解船体舷侧板架极限载荷,得到一种适用于冰载荷作用区域小于板格的舷侧结构强度快速校核方法。4.针对冰载荷区域超出单块板格的情况,讨论如何简化建模范围,研究得到三种简化的适用不同载荷范围的建模方式。
[Abstract]:With the rising global temperature, the melting of Arctic glaciers, the passage of the Arctic Channel is becoming more feasible, and the abundant oil resources make the study of the Arctic increasingly heated. Because there is a lot of sea ice floating on the current Arctic course, ships sailing in the Arctic may collide with the sea ice, and the collision force of the ice ship interaction may lead to the destruction of the hull structure. Therefore, the ship structure design and strength check need to consider the bearing capacity of the structure under ice load. In the strength checking of polar ships by ABS, nonlinear finite element method is needed to evaluate the ship strength. The evaluation process is time-consuming and needs a lot of modeling work. In this paper, the strength checking method for the side reinforcement structure of polar ships is studied. The contents of the research are as follows. 1. The research background and present situation of this paper are introduced. At the same time, the direct calculation method for polar ship structure strength checking in the ice level guide of American Classification Society (ABS) is also introduced. The plastic design formula of rigid rectangular plates with four edges is studied. Based on the "double drill" failure mode, nonlinear finite element method is used to modify the plastic design formula derived from the failure mode. The applicability of the modified formula is verified. 3. According to the modified formula and the derived analytical solution of the elastic stage of rectangular plates, a fast checking method for the strength of the side structure with Yu Bing load area smaller than the plate lattice is obtained by solving the limit load of the hull side plate frame. 4. In view of the situation that the ice load area exceeds the single plate lattice, this paper discusses how to simplify the modeling range, and studies three simplified modeling methods suitable for different load ranges.
【学位授予单位】：上海交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U661.4

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