柱稳式锚泊电子信息浮台的结构强度分析及系泊优化

发布时间：2018-03-16 23:03

本文选题：浮台　切入点：设计波　出处：《哈尔滨工业大学》2017年硕士论文　论文类型：学位论文

【摘要】：随着南海问题的不断发酵,维护我国海洋权益的问题越来越重要,而目前我国海上的监测主要靠的是半潜式海洋平台与海洋资料浮标。然而,海洋平台过于庞大,对于海上监测的任务来说,经济性与灵活性不足。海洋资料浮标由于体积较小,观测的能力有限。二者都不足以对海洋进行更为高效的观测,于是,一种新型的海洋结构物柱稳式锚泊电子信息浮台应运而生。由于此浮台在世界上是首例,并没有直接的规范参考,因此,本文对柱稳式锚泊电子信息浮台的结构合理性做了校核与优化工作,主要内容如下:(1)对浮台的结构按照如下步骤做了总体强度计算:首先,根据浮台的结构特点确定了浮台典型的4种工况;然后根据设计波理论对设计波进行了分析得到了各种典型工况下设计波的参数并由设计波得到各个工况下的波浪载荷;最后,用有限元计算法计算波浪载荷作用下的浮台结构的总体强度,并将计算的结果与需用应力进行对比来判定浮台的强度。(2)对受到锚链力影响的浮台局部结构按照如下的步骤进行了强度校核:首先,利用AQWA软件对浮台的水动力模型进行时域频域的分析,得到了在百年一遇的作用下浮台所受的最大锚链力;然后通过对局部的结构施加锚链力的作用得到了局部结构的所受的最大应力,通过与相关标准的核对,证明了系泊结构的安全性。(3)为了降低锚链力,本文针对系泊系统进行了优化,先是对比了四种缆索的方案,从中选取了较优秀的方案;然后通过目标驱动的优化设计,得到了最优的缆索重量和缆索长度;最后对最优设计的参数和原方案分别在五级海况和百年一遇的海况下的核算得到了新的系泊方案的改善程度。
[Abstract]:With the continuous development of the South China Sea problem, it is more and more important to safeguard the marine rights and interests of our country. At present, the monitoring at sea in China mainly depends on semi-submersible offshore platforms and ocean data buoys. However, the offshore platforms are too large. For the task of monitoring at sea, economy and flexibility are not enough. Because of their small size and limited observation capacity, ocean data buoys are not sufficient for more efficient observation of the ocean, so, A new type of marine structure column stabilized anchor electronic information floating platform emerges as the times require. As this floating platform is the first in the world and has no direct normative reference, so, In this paper, the structural rationality of the column stabilized anchor electronic information floating platform is checked and optimized. The main contents are as follows: (1) the overall strength of the floating platform is calculated according to the following steps: first, According to the structural characteristics of the floating platform, the typical four working conditions of the floating platform are determined, and then the parameters of the design wave under various typical working conditions are analyzed according to the design wave theory and the wave loads under each working condition are obtained from the design wave. The overall strength of floating platform structure under wave loads is calculated by finite element method. The calculated results are compared with the required stress to determine the strength of the floating platform. (2) the local structure of the floating platform affected by the anchor chain force is checked according to the following steps: first, The hydrodynamic model of floating platform is analyzed in time domain and frequency domain by using AQWA software, and the maximum anchor chain force of floating platform is obtained under the action of once in a hundred years. Then the maximum stress of the local structure is obtained by applying the anchor chain force to the local structure. The safety of the mooring structure is proved by checking with the relevant standards. In this paper, the mooring system is optimized. Firstly, four kinds of cable schemes are compared, and the better scheme is selected, then the optimum cable weight and cable length are obtained by the optimization design of target drive. Finally, the new mooring scheme is improved by the calculation of the parameters of the optimal design and the original scheme under the sea conditions of five levels and one hundred years, respectively.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P715

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