【摘要】 初步分析了罐壁应力分布的基本特点,提出了一种组合圆柱壳理论的应力计算解析方法。比较了已有罐底板应力计算中罐-土耦合有限元分析的建模方法,建立了以基础沉降量为边界条件的新模型。采用数值模拟优化分析方法,研究了不同结构参数对油罐安全性的影响。利用非线性有限元方法,进行了准静态弹塑性屈曲分析。研究结果表明,新的计算方法和计算模型可大大提高罐体应力计算结果的准确度,部分研究成果可为制订我国大型立式圆筒形钢制焊接油罐标准提供技术数据。更多还原

【Abstract】 After analyzing the basic features of stress distribution over tank shell,a stress calculation method is proposed based on the theory of combined cylindrical shells.Compared with the existing modeling methods for stress calculation of bottom by using finite element analysis of tank-soil coupling,a new model which takes foundation settlement as the boundary condition is established.The influence o safe reliability from different structural parameters is studied by using analytical methods of numerical simulated optimization.And elastic-plastic buckling research under quasi-static is carried out by using nonlinear finite element analysis.The results show that new methods and models can significantly improve the accuracy of stress calculation,and part of the achieved results can provide technical data for making standards,which are concerned with large stand cylindrical steel welded oil storage tank.更多还原