General Electric Company

Siemens Energy Global Gmbh & Co. Kg

Sesha Gundavarapu

Jason Winfred Jewett

Sebastian Schmitz

Carol Ann Sterantino

Suhas Karkada Suresh

Sarah Elizabeth DiDomizio

A method, device, and system of estimation fatigue life of a technical system are disclosed. The method includes computing a lifing probability distribution for at least one component of the technical system based on material property scatter data and at least one damage scenario associated with the at least one component. Further, the method includes determining a time-damage accumulation for the at least one component by combining plurality of damage scenario and damage accumulation rules for the at least one component. Furthermore, the method includes determining a spatial-damage accumulation and a cumulative time-damage accumulation for each of a plurality of regions in the at least one component. The method also includes determining an integral damage including integral of the spatial-damage accumulation and the cumulative time-damage accumulation for the at least one component based on simulation of the at least one damage scenario and conditional probabilities for the at least one damage scenario. The fatigue life of the technical system is estimated by determining a probability of fatigue failure of the technical system by combining the integral damage and predicted damage scenarios for a plurality of components in the technical system based on the law of total probability.

Estimating fatigue life of technical systems

Systems for increasing the efficiency of a turbine and an overall power plant system are disclosed. In one embodiment, a turbine includes: an outer shell including a set of grooves configured to complement components of a wheel and diaphragm steam path section; a drum rotor disposed within the outer shell; a set of shell converts connected to the outer shell via the set of grooves, the set of shell converts configured to complement components of the drum rotor; and a working fluid passage substantially defined by the drum rotor and the set of shell converts.

Turbine drum rotor retrofit

Growing community of inventors

Bengaluru, India

Sesha Gundavarapu