A RESEARCH ON THE RELIABILITY CALCULATION AND SAFETY ASSESSMENT METHODS OF SPHERICAL TANK WITH DEFECTS
In the process of spherical tank fabrication, there were lots of defects such as edge offset and angular distortion appearing by the reason of cylinder prebending, assembling and mistakenly welding. It was dangerous during the spherical tank with these defects was operated, so calculation of the failure probability and safe assessment were especially important. Assessment procedures based on probabilistic fracture mechanics doesn’t only analyze the uncertain factors of traditional safe assessment method and process and fully consider the randomness and actual variance of different parameters, but also analyzes the effect of vary of sorts of parameters and factors controlling fracture failure to confidence level and fracture failure probability. According to stress-strength interference theory, limit state function was established, failure probability model was developed and some parameters in this model were considered as stochastic variable. Then the failure probability of spherical tanks is calculated by First-Order Second Moment method and Monte-Carlo method.
Shuo Pan Jianping Zhao
Nanjing University of Technology, No.5 XinMoFan Road, Nanjing, 210009.
国际会议
第九届工程结构完整性国际会议(The Ninth International Conference on Engineering Structural Integrity Assessment)
北京
英文
2007-10-15（万方平台首次上网日期，不代表论文的发表时间）