Journal of Shanghai Jiaotong University ›› 2019, Vol. 53 ›› Issue (3): 315-320.doi: 10.16183/j.cnki.jsjtu.2019.03.008

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Crack Life Evaluation of Flywheel for Canned Main Pump

LIU Bingyi,ZHANG Jige,WANG Dezhong,LI Bin   

  1. School of Nuclear Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
  • Online:2019-03-28 Published:2019-03-28

Abstract: A new crack life assessment method is proposed for the bimetal shielded nuclear main pump flywheel with complex structure and force. This paper establishes a three-dimensional model of canned main pump flywheel with crack and uses the finite element software ANSYS Workbench to analyze the fracture mechanics. Then we find the relationship between the stress intensity factor of flywheel crack with the rotational speed, crack depth and crack length, which is used to fix the formula of stress intensity factor. Moreover, we use the Paris formula to evaluate the life of flywheel crack. The stress distribution of the flywheel and the stress intensity factor of the crack are obtained, and the relationship between crack size and the stress intensity factor is found to calculate the crack life, which is within safety limits. The revised calculation method is adopted to bimetallic flywheel for canned main pump under complex situations and with complex structures.

Key words: canned main pump, bimetallic flywheel, Paris formula, crack life evaluation, stress intensity factor

CLC Number: