船体变形对海上升压站上部组块海运设计的影响

  目的  海运工况是海上升压站上部组块结构设计的控制工况之一，荷载输入的准确性直接影响上部组块的结构设计。目前国内上部组块的海运工况普遍忽略了船体变形荷载的影响，将船体考虑为一个刚体，该假设不符合实际情况，有必要针对船体变形产生的影响进行分析。  方法  首先介绍了国内海运设计方法，然后结合船级社规范对船体变形进行理论阐述，介绍了某些跨国公司海运设计如何考虑船体变形的影响，对目前的海运设计方法进行了改进。  结果  实际项目计算证明不考虑船体变形荷载时结构应力严重偏小。随着海洋工程的发展，船体变形对海运设计的影响应该更受重视。  结论  本研究阐述了传统海运设计方法的不足，为改进海运设计提供了重要依据。

Influence of Hull Deformation on Sea Transportation Design for Topside Module of Offshore Substation

  Introduction  Sea transportation is one of the governing conditions for the structural design of topside modules, the accuracy of load input directly affects the structural design of the topside. At present, domestic sea transportation design generally ignored the influence of hull deformation in topside design, which considers the hull as a rigid body, this assumption is not in line with the actual situation, it is necessary to analyze the influence of hull deformation on sea transportation design of the topside module.  Method  Firstly, the domestic sea transportation analysis methods were introduced. Then, combined with the classification society specification, the hull deformation was theoretically expounded, and how some multinational companies consider the influence of hull deformation on sea transportation design of topside module was introduced, the current sea transportation design method was improved.  Result  Based on real project calculation, it proves that structural stress is seriously small without considering the hull deformation load. With the development of marine engineering, we need to pay more attention to the influence of hull deformation on sea transportation design.  Conclusion  This paper explains the risk of traditional sea transportation design and provides an important basis for improving sea transportation design methods.