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采用有限元Ansys软件建立离心式上充泵三维模型和划分有限元网格,对其结构进行固有模态分析,并采用静力法按SSE地震载荷计算上充泵的抗震性能,并将自重、温度、工作压力等载荷的作用结果与地震载荷的作用结果按SRSS组合.结果表明:离心式上充泵结构的基频为655.13Hz,远大于33Hz,为刚性结构;上充泵最大Von Mises等效应力发生在外壳体中部,为103.40MPa,小于ASME-Ⅱ所确定的该材料许用应力140.23MPa;位移最大响应发生在外壳体中部,为0.143mm,远小于各部件最小1mm间隙,满足抗震规范要求.
The three-dimensional model of the centrifugal pump and the finite element mesh are established by finite element Ansys software. The inherent modal analysis of the structure is carried out. The static loading method is used to calculate the seismic performance of the upper charge pump by static load, Temperature, working pressure and other loads and the result of seismic load are combined by SRSS.The results show that the basic frequency of the centrifugal charging pump structure is 655.13Hz, which is much larger than 33Hz and is a rigid structure. The maximum Von Mises and so on The effective stress occurs in the middle of the outer shell, which is 103.40MPa, which is less than the allowable stress of 140.23MPa as determined by ASME-Ⅱ. The maximum displacement response occurs in the middle of the outer shell, which is 0.143mm, far less than the minimum clearance of 1mm for each component, requirements.