摘要
X80天然气管线中的延性断裂止裂是当前世界范围内研究的热点和难点问题。运用BTC,RBTC以及HLP模型对X80管线中的动态裂纹扩展速度进行了计算。通过与试验结果进行对比分析发现,RBTC模型计算的动态裂纹扩展速度与试验结果最为符合,HLP模型其次,BTC模型最差。这可归因于RBTC模型中嵌入了更为合理的止裂压力计算结果以及更为准确的通过回归计算得到的常数项。
Running ductile fracture arrest for X80 gas pipelines is a key and open issue in the world. In present study, the running crack propagation velocities were calculated based on BTC model, RBTC mod- el, and HLP model, respectively. By comparing the calculation results with the experimental results, it was found that the calculation results with the RBTC model are the best fitting with the experimental results. It is attributed to the modification in the arrest pressure calculation and the proper constant item resulted from regression calculation in the RBTC model. While, the calculation results with the BTC model are the worst fitting with the experimental results.
出处
《压力容器》
2013年第2期33-35,21,共4页
Pressure Vessel Technology
基金
陕西省自然科学基础研究计划(No.2011JQ6017)
中国石油集团CNPC的支持
