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Abstract:
Because of complicated structure and load condition, accurate
rigidity/strength analysis of the runner hub is difficult to the axial
flow water turbine. To study the stress and displacement distribution of
the axial flow runner hub in operation, the rigidity/strength analysis
is conducted by using FEM based on dynamic equations of elastic
structure and periodic boundary condition. One sector including whole
pintle hole is selected as computation model. Two operation points
including rating points, maximum head points and two running away
points are taken into account. According to the result, the maximal
stress of the hub on the running away point is larger far and away than
that on the normal points. The maximal stress and distortion lie the
lower part of the big pintle hole, which accord with the fact. And the
result shows that the method used is effective.
Key words: FEM Runner hub Rigidity/strength
CLC No: TK730
国家自然科学基金(90410019)、教育部高等学校博士点专项基金 (20040700009)和陕西省教育厅专项科研计划基金(05JK264)资助项目. Received 20051018, received in revised form 20060317
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