船舶与海洋工程学报(英文版)
船舶與海洋工程學報(英文版)
선박여해양공정학보(영문판)
JOURNAL OF MARINE SCIENCE AND APPLICATION
2011年
1期
1-6
,共6页
张炜%唐文勇%陈念众%张圣坤
張煒%唐文勇%陳唸衆%張聖坤
장위%당문용%진념음%장골곤
composite material%reliability analysis%response-surface method%sensitivity analysis
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 effects of stochastic characteristics of materials on the reliability of ship hulls made of composite materials should be considered during the reliability assessment of composite ships. Finally, some conclusions and recommendations were given for high-speed ship design and safety assessment.