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

Abstract

[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.

Keywords

• offshore substation
• topside module
• sea transportation design
• hull deformation
• structural stress