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底部支撑的快堆主容器是由3个圆筒、2个圆锥壳、2个形状复杂的封头、1个大旋塞、1个堆芯支承结构和2个支承环组成的复杂结构。为了确定主容器及其支撑在地震载荷下挠曲特性的静态模型，将其简化为由4个圆筒、5个圆锥壳、2个椭圆壳和一个圆盘构成的复合结构，并将作为分析模型。然后，用有限元方法，计算出在垂直载荷、横向剪切载荷、剪切／垂直载荷多种变化速率下复合结构的挠曲载荷和挠曲模式。对高温引起的材料扬氏模量降低对挠曲特性的影响进行了校验，对原始缺陷对挠曲载荷和挠曲模式的影响也进行了讨论。
The bottom-supported fast reactor main container is a complex structure consisting of three cylinders, two conical shells, two complex shaped heads, one large cock, one core support structure and two support rings. In order to determine the main container and its static model supporting the deflection behavior under seismic loading, it is reduced to a composite structure consisting of 4 cylinders, 5 conical shells, 2 elliptical shells and a disk and will be used as an analysis model. Then, using the finite element method, the flexural load and deflection modes of the composite structures at various rates of vertical load, transverse shear load, shear / vertical load were calculated. The effect of lowering Young’s modulus of the material caused by high temperature on the flexural properties was checked and the effect of the initial defect on the flexural load and flexural mode was also discussed.