The invention provides a
water turbine part crack operation and maintenance method, and belongs to the technical field of
water turbine crack maintenance. The method comprises the following steps: acquiring operation parameters, crack characteristics and far-field stress of a
water turbine component, and determining a
weight distribution coefficient, a
stress intensity factor and the like through stress analysis. According to the method, to-be-evaluated components with
weight distribution coefficients, stress intensity factors and the like meeting specific conditions are screened out,
processing measures and cost-benefit net present values of the to-be-evaluated components are obtained, risk grade scores of all the measures are determined, a target
processing measure with the
minimum risk grade
score and the cost-benefit net present value exceeding a threshold value is selected, and finally the target
processing measure is issued to a user terminal. And a user can maintain the components conveniently. According to the method, the condition of the water
turbine component is accurately evaluated by obtaining related parameters and analyzing the bearing force, a scientific basis is provided for
decision making, key components are screened according to various parameter standards, the operation and maintenance efficiency is improved, in addition, target processing measures can be determined by comprehensively considering risks and cost benefits, and excessive or insufficient processing is avoided.