中国石油大学学报（自然科学版）2017，Vol.41Issue(4)：132-139,8.DOI:10.3969/j.issn.1673-5005.2017.04.017
基于数理统计的海洋平台燃爆数值建模优化研究
Optimized scheme of numerical modeling for explosion of offshore platforms based on mathematical statistics
摘要
Abstract
The numerical modeling is one of the key foundations for the explosion risk assessment of offshore platforms. Howev-er, there is a lack of unified modelling standards for grid size, obstruction congestion etc. , and thus the prediction accuracy of the explosive overpressure is difficult to guarantee. This paper aims to propose a procedure to derive the optimized numerical modelling scheme based on the statistics theory. Firstly, the numerical equations of the overpressure and its influencing factors are discretized to get the overpressure set, model set and condition set. Then, the analysis of the grid optimization, physical model optimization and similar supplementary plan is carried out based on the vector space derived from the Latin hypercube sampling of condition set. At last, the correlation coefficient between the results of numerical model and theoretical model is used to determine the suitable grid size, the equivalent diameter of deleted obstacle for engineering. The result shows that the size of the grid in the core area of the numerical model for explosion risk assessment of offshore platforms is recommended as 0. 2 m. For the platform in service, the obstacles with equivalent diameter less than 0. 06 m can be ignored during modelling, and the obstacles with equivalent diameter less than 0. 08 m can be replaced by the equivalent uniform tubes. For the platform under design, the tube with diameter of 0. 08 m can be used to represent the congestion of the platform. The conclusion can help to reduce the workload of modelling while ensuring the accuracy of overpressure prediction.关键词
数值模型/障碍物/优化方法/相似原理/燃爆风险分析Key words
numerical model/obstacle/optimization method/similarity principle/explosion risk analysis( ERA)分类
能源科技引用本文复制引用
朱渊,师吉浩,陈国明,张肖锦,郭子琛,谢镔..基于数理统计的海洋平台燃爆数值建模优化研究[J].中国石油大学学报（自然科学版）,2017,41(4):132-139,8.基金项目
国家自然科学基金项目(51579246) （51579246）
中央高校基本科研业务费专项(15CX05018A,15CX05003A,16CX06019A) （15CX05018A,15CX05003A,16CX06019A）
工业和信息化部高技术船舶科研计划项目(工信部联装[2016]24号) （工信部联装[2016]24号）
