The fluid-structure interaction of the model of the axial flow pump impeller is analyzed by using SIMPLEC algorithm and RANG turbulence k-E model. The impeller internal stress and strain and the fluid velocity distribution situation on the different operating conditions are obtained. The results show that the impeller's biggest stress and strain occur at the root, where the blade is connected with the wheel hub. As the pamp head increases, they reduces. The biggest distortion occurs at the blade end. The obvious backflow appears on the reverse side of the blade.%采用了SIMPLEC算法、RNG k-ε湍流方程对轴流泵叶轮进行流固耦合分析,得到不同工况下叶轮内部应力与应变,流体流速分布情况.结果发现,叶轮的最大应变和应力均发生在叶片和轮毂连接的部位,并随着扬程的增大而减小；叶片的最大变形发生在末端；叶片背面发生明显的回流.
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