微内压储罐设计解析

Discussion on the Design and Analysis of Small Internal Pressure Oil Tank

针对微内压储罐设计规范中的公式和概念,从罐顶与罐壁的弱连接结构、罐底部不被抬起的最大内压、抗压环发生屈曲破坏时的压力、设计内压和锚固、通气(呼吸)几个方面解析了微内压储罐设计中遇到的一些问题,如"弱项"结构条件、抗压环塑性失稳临界条件、罐壁将被抬起而未被抬起时的临界压力、储罐锚固、呼吸阀配置等,同时对规范中的一些公式进行了推导和说明,并对GB50341-2003及API 650的一些不同点进行了比较和分析。

Aiming at the formulas and concepts in the standards and codes designing tanks of small internal pressures,some aspects concerning the issue in the design of such tanks including the weak roof-to-shell connections(frangible joint) ,the critical maximum internal pressure for tank bottom not being uplifting,the failure pressure for the compression rings reaches the yield point,the design internal pressure and anchors and venting (breathing), such as 'frangible joint-roof' structure conditions, the critical elastic failure conditions of compression rings,the critical pressure for uplifting the tank shell from the tank foundation, tank anchor, vent valves selection etc. In the same time, some formulas in the standards and codes are deduced and explained. The differences between GB50341-2003 and API 650 are compared and analyzed.