讨论了快中子增殖反应堆在运行工况下 ,主容器内液态钠的高温和液压的存在对容器的屈曲行为的影响 .首先用有限元分析了聚氯乙烯圆柱壳容器实验模型在室温和高温、无液压和有液压时在模拟水平地震的水平力和弯矩荷载下的屈曲荷载与屈曲模态 ,高温使容器壁的弹性模量降低 ,从而使容器抗屈曲能力降低 ,而液压的存在使抗屈曲能力增加 .计算结果与实验结果吻合得很好 .然后用同一程序计算了中国实验快堆钠池主容器在室温和高温、无液压和有液压时在模拟水平地震的水平力和弯矩荷载下的静态屈曲荷载与屈曲模态 ,由于屈曲发生在主容器的裙座 ,不是在有液体的主圆柱壳上 ,高温和液压对屈曲荷载与屈曲模态几乎没有影响 The effects of the high temperature and hydraulic pressure of liquid sodium in the main container on the buckling behavior of the container under fast operating conditions were discussed.Firstly, finite element analysis of the experimental model of polyvinyl chloride (PVC) cylindrical shell container at room temperature and high temperature , No buckling load and buckling mode under horizontal force and bending moment under simulated horizontal earthquake without hydraulic pressure and hydraulic pressure, the elastic modulus of the container wall is reduced by the high temperature, so that the buckling resistance of the container is reduced, and the existence of hydraulic pressure The buckling resistance increases and the calculated results are in good agreement with the experimental results.And then using the same program to calculate the horizontal force and bending moment of the main container of the Chinese experimental fast reactor sodium pool at simulated and horizontal earthquakes at room temperature and high temperature without hydraulic pressure and hydraulic pressure The static buckling load and buckling mode under load, as buckling occurs in the skirt of the main container, not on the main cylindrical shell with liquid, and high temperature and hydraulic pressure have almost no effect on buckling load and buckling mode