中文摘要：

建造在软土地基上的大型钢储罐易产生沉降变形，其中罐周不均匀沉降对储罐结构的影响最为不利．对罐周谐波沉降下的变壁厚浮顶型钢储罐进行有限元参数分析，讨论变壁厚储罐的主要几何参数（包括壁厚变化参数、抗风环梁相对刚度、径厚比和高径比）对储罐结构变形、应力的影响，并比较分析谐波沉降下变壁厚储罐与等壁厚储罐的受力性能．

英文摘要：

Settlement deformation often happens on large steel tanks constructed on soft groundwork, in which the influence of uneven settlement around tank wall is the most detrimental for tank structure. By analyzing the finite element parameters of floating-roof tapered tanks under harmonic settlement, the effects of the major geometric parameters of tapered tank （including wall variable parameters, wind girder stiffness, radius-to-thickness ratio and height-to-radius ratio） on tank structure deformation and stress are discussed. Finally, compare of structure behavior of tapered tank and uniform tanks under harmonic settlement is also carried out.