Mechanical component life prediction method based on degradation process model

The invention provides a mechanical component life prediction method based on a degradation process model, and the method comprises the following steps: building the degradation process model of a mechanical component, and obtaining a strength expression and a stress expression of the mechanical component; obtaining an expression of a limit state function of the mechanical component according to the strength expression and the stress expression; according to the limit state function expression, calculating to obtain an upward penetration rate expression of the mechanical component; calculatingthe time-varying reliability of the mechanical component in the service process according to the criterion of exceeding the failure for the first time, and determining the life prediction value of the mechanical component. According to the mechanical component service life prediction method based on the degradation process model, the random degradation process theory is combined with the penetration rate calculation, the