钢制焊接储罐晃动波高的计算

Calculation of sloshing wave height of steel welded storage tank

针对钢制焊接储罐设计人员如何选取设计规范进行不同条件下的储液晃动波高计算的问题,介绍了GB 50341-2003、GB 50761-2012与API 650-2013中关于储罐晃动波高的计算公式及其影响因素,主要分析了GB 50341-2003与GB 50761-2012中储液晃动基本周期对地震影响系数取值的影响及其差异,对10×104 m3、1×104 m3及200 m3储罐进行了储液晃动基本周期、地震影响系数和储液晃动波高的计算,计算结果表明:相同容积与径高比的储罐晃动基本周期相同;储罐径高比越大,GB 50761-2012、API 650-2013与GB 50341-2003计算所得的晃动波高相差越大;当径高比趋于1时,GB 50761-2012、API 650-2013与GB 50341–2003计算所得的晃动波高相差较小。根据计算结果,给出了各个储罐设计规范中晃动波高计算公式的适用范围。

To help the designers to rationally select proper design specifi cations for calculating the sloshing wave height of stored liquid in steel welded storage tank under different conditions, this paper presents the computational formulae and infl uential factors of sloshing wave height in such tank design specifi cations as GB 50341-2003, GB 50761-2012 and API 650-2013, and mainly analyzes the effects of basic stored liquid sloshing cycle on the value of seismic infl uence factor in GB 50341-2003 and GB 50761-2012 and their differences. Moreover, calculation is made on basic stored liquid sloshing cycle, seismic infl uence factor and stored liquid sloshing wave height of 10×104 m3, 1×104 m3 and 200 m3 storage tanks, respectively. The calculation results show that the basic sloshing cycles of storage tanks with the same volume and diameterheight ratio are identical, however, the greater the diameter-height ratio, the more different the sloshing wave height fi gured out as per GB 50761-2012, API 650-2013 and GB 50341-2003 is, when the diameter-height ratio tends to be 1, the sloshing wave heights fi gured out as per GB 50761-2012, API 650-2013 and GB 50341-2003 are only slightly different. Finally, based on comparison and analyses on the calculation results, this paper presents the applicability of sloshing wave height computational formulae in the tank design specifi cations.