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对秦山核电厂二期600 MW反应堆及CAP 1400反应堆空吊篮在空气中和静水中振动特性的边界条件进行研究。吊篮结构采用实体建模,流体结构采用流体单元模拟。本研究分别用弱贴紧、中度贴紧和强贴紧来模拟法兰与容器支承台阶之间不同的贴紧状态,用弱摩擦、中度摩擦和强摩擦模拟法兰与容器支承台阶之间受到的不同摩擦力。研究表明,秦山核电厂二期600 MW反应堆空吊篮在静水中的边界条件比空气中的强,CAP 1400反应堆空吊篮在空气中与静水中的边界条件一致;压紧弹性环的预紧力和吊篮法兰所受到的摩擦力对吊篮结构固有频率有一定影响。
The boundary conditions of the vibration characteristics of the 600MW MW6 reactor and the empty pedestal of the CAP 1400 reactor in the air and in the still water were studied. Hanging basket structure using solid modeling, fluid structure using fluid unit simulation. In this study, the different close-fitting states between the flange and the container support steps were modeled as weakly-adhered, mediumly-adhered and strongly-adhered respectively, and the flanges and containers were used to support the steps with weak, medium and strong friction Between the different friction. The research shows that the boundary condition of the empty basket of the second phase of Qinshan Nuclear Power Station 600 MW reactor in still water is stronger than that in the air, the boundary conditions of the CAP 1400 empty suspended basket in the air are the same as those in still water, The friction that the force and the basket flange receive has certain influence on the natural frequency of the basket structure.