运用短圆柱壳挠曲线微分方程,基于变形光滑连续条件,建立用于计算大型储罐罐壁应力的弹性分析法力学模型,推导阶梯厚度壳轴向应力的计算公式,得到详细的计算过程.采用此方法,以容积为15×104 m3大型储罐为算例进行验算,并对有限单元法数值计算结果和现场实测数据进行对比.结果表明,该方法能够较精确地计算罐壁应力,可以为罐壁设计与校核提供参考.%Based on continuity and smoothness conditions of deflection on shell, the mechanical model was established using elastic analysis method for calculating shell stress distribution of large storage tank. The formulas for calculation of hoop and axial stress on stepped thickness shell were deduced by using deflection differential equation of short cylindrical shell. Taking a tank with volume of 15×104 m5 for example, the detailed calculation process of tank shell was provided based on elastic a-nalysis method. Compared the finite element method calculation results with the testing data, the feasibility and effectiveness of the method were verified. The results show that the method can accurately calculate the stress on tank wall, and can provide a reference for the design and checking of the tank wall.
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