Axle box spring service state calculation method based on material fatigue strength

The invention provides an axle box spring service state calculation method based on material fatigue strength, and belongs to the technical field of axle box spring service state analysis. The calculation method comprises the steps of obtaining material fatigue strength of the axle box spring; converting the turning fatigue strength into torsion fatigue strength based on the load factor Cm; converting the fatigue strength of the material into the fatigue strength of the axle box spring structural member based on the comprehensive correction coefficient; the equivalent symmetric cyclic stress of the axle box spring in service is obtained; and calculating the critical dynamic load coefficient and the critical maximum load of the axle box spring according to the equivalent symmetric cyclic stress of the axle box spring structural member and a Goodman load form conversion formula. According to the calculation method, the material fatigue strength principle is applied, the calculation method is simple and easy to