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为了提高超大型石油储罐的安全性能,开展了15×104m3油罐的结构优化分析。比较了罐体壁板和底板应力的几种计算方法,提出采用“组合圆柱壳法”计算壁板应力以及采用基于沉降量的有限元法计算底板应力;参照美国API 650和日本JIS B 8501设计规范制订了4种结构设计方案,计算得到各方案中壁板应力与底板应力大小,并进行相互比较。分析结果表明,参照美国API650标准设计并选用宽幅钢板的结构设计方案四理论计算应力最小,且应力评定合格。
In order to improve the safety performance of very large oil storage tanks, a structural optimization analysis of 15 × 104m3 oil tanks was carried out. Comparisons of several calculation methods of tank wall and floor stress are given, and the stress of floor slab is calculated by “combined cylindrical shell method” and the floor slab stress is calculated by finite element method based on settlement. Reference is made to API 650 and JIS B 8501 Specially formulated four kinds of structural design programs, calculate the stress of each plank and floor stress, and compare with each other. The analysis results show that, according to the design of the American API650 standard and the selection of the structural design scheme of the wide steel plate, the theoretical calculation stress is the least, and the stress is qualified.