Stress interpolation method and system for fatigue design of steel volute

The invention provides a stress interpolation method and system for steel volute fatigue design, and relates to the field of steel volute fatigue life prediction. The method comprises the steps of steel volute gridding division, monitoring information collection and primary processing, geophysical prospecting detection and monitoring information supplementation, simulation inversion and multi-source data fusion and data arrangement and statistical analysis. The system comprises a steel volute gridding division module, a monitoring information acquisition and primary processing module, a geophysical prospecting detection and monitoring information supplement module, a simulation inversion and multi-source data fusion module and a data arrangement and statistical analysis module. Through the arrangement, monitoring, detection and simulation information are fused, an information source is expanded, and the problems that the stress monitoring information of the steel volute is less and the reliability of the simu