船舶-自升式海洋平台碰撞相似率研究

发布时间：2018-11-26 21:04

【摘要】：海洋平台作为海洋能源勘探开发的主要组成部分,是海洋油气探井、钻井、开采的主要作业基地,船舶碰撞致使平台结构损伤破坏一直是威胁海洋平台安全的主要因素之一,开展海洋平台碰撞性能研究,揭示平台结构在碰撞过程中的损伤变形机理,对提升平台安全性具有重要意义。评估平台结构耐撞性能最可靠的方法是实船碰撞试验,然而因其耗资巨大而不易开展。按一定相似关系进行比例模型试验成为现实条件下的首选。基于相似第二定理,运用量纲分析法推导船舶-自升式海洋平台碰撞过程中各物理量的相似关系,为平台碰撞模型试验的开展及试验参数的确定提供重要依据;结合有限元仿真技术,以平台典型的T型和K型管节点为研究对象,建立不同缩尺比下的简化碰撞模型,比较验证相似理论的可靠性;研究结果表明,缩尺模型在碰撞冲击载荷下的结构损伤变形、碰撞力和能量吸收等动态响应与实尺度模型结果一致性较好。研究成果可以为大型平台结构碰撞模型试验设计提供技术支撑。
[Abstract]:As the main component of offshore energy exploration and development, offshore platform is the main operating base of offshore oil and gas exploration well, drilling and mining. The damage and damage of platform structure caused by ship collision has been one of the main factors threatening the safety of offshore platform. It is of great significance to study the collision performance of offshore platform and reveal the damage and deformation mechanism of platform structure in the process of collision, which is of great significance to enhance the safety of platform. The most reliable method to evaluate the crashworthiness of platform structure is the real ship collision test, but it is difficult to carry out because of its huge cost. The proportional model test based on a certain similarity relation has become the first choice in the realistic condition. Based on the second theorem of similarity, this paper deduces the similarity relation of physical quantities in the process of ship-jack-up offshore platform collision by using dimensional analysis method, which provides an important basis for the development of the model test of platform collision and the determination of test parameters. Combined with finite element simulation technology, the typical T-shaped and K-shaped tubular joints of the platform are taken as the research objects, and the simplified collision models with different scale ratios are established, and the reliability of the similarity theory is compared and verified. The results show that the dynamic responses of the scale model under impact load are in good agreement with the results of the real scale model. The research results can provide technical support for the experimental design of large-scale platform structure collision model.
【作者单位】：江苏科技大学船舶与海洋工程学院;上海船舶设计研究院;美国船级社;
【基金】：国家自然科学基金(51379093)
【分类号】：P751

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