Investigation of the Structural Strength of Existing Blast Walls in Well-Test Areas on Drillships

Journal of Marine Science and Engineering

Jung Kwan Seo¹  Byeongkwon Jung¹  Jeong Hwan Kim² 

[1] Department of Naval Architecture and Ocean Engineering, Pusan National University, Busan 46241, Korea;The Korea Ship and Offshore Research Institute, Pusan National University, Busan 46241, Korea;

关键词: drillship;    blast wall;    explosion;    well-test areas;    strength evaluation;    non-linear structural analysis;   

DOI  :  10.3390/jmse8080583

来源: DOAJ

【 摘 要 】

Blast walls are installed on the topside of offshore structures to reduce the damage from fire and explosion accidents. The blast walls on production platforms such as floating production storage, offloading, and floating production units undergo fire and explosion risk analysis, but information about blast walls on the well-test area of drillship topsides is insufficient even though well tests are performed 30 to 45 times per year. Moreover, current industrial practices of design method are used as simplified elastically design approaches. Therefore, this study investigates the strength characteristic of blast wall on drillship based on the blast load profile from fire and explosion risk analysis results, as well as the ability of the current design scantling of the blast wall to endure the blast pressure during the well test. The maximum plastic strain of the FE results occurs at the bottom connection between the vertical girder and the blast wall plate. Based on the results, several alternative design applications are suggested to reduce the fabrication cost of a blast wall such as differences of stiffened plated structure and corrugated panels, possibility of changing material (mild steel), and reduced plate thickness for application in current industrial practices.

【 授权许可】

Unknown