纵向弯矩下材料随机特性对复合材料船体可靠性的影响

• Published in: 船舶与海洋工程学报(英文版) Vol. 10; no. 1; pp. 1 - 6
• Main Authors: 张炜, 唐文勇, 陈念众, 张圣坤
• Format: Journal Article
• Language: Chinese
• Published: State Key Laboratory of Ocean Engineering, Shanghai Jiao Tong University, Shanghai 200240, China 2011
• Subjects: reliability analysis; sensitivity analysis; response-surface method; composite material
• ISSN: 1671-9433
• DOI: 10.1007/s11804-011-1034-9

U6; The effects of stochastic characteristics of materials on the reliability of ship hulls made of composite materials under longitudinal moment were extensively studied using reliability and sensitivity calculations of a composite ship hull which was sagging. The reliability indices and failure probabilities of the ship in three kinds of failure modes (buckling, material failure, and ultimate collapse) were calculated by the surface response method and JC method. The importance factors of random variables in stochastic models,such as the model errors in predicting the ultimate longitudinal strength of ship and the longitudinal bending moment that the ship withstands, as well as the stochastic characteristics of materials in the models used, were calculated. Then, the effects of these random variables, including the stochastic characteristics of materials on the reliability index and the failure probability of ships which were sagging, were discussed with their importance factors. The results show that the e