Probabilistic Lifetime Assessment of Turbine Blades

M. Voigt, R. Mücke, K. Vogeler

abstract:

This paper presents an introduction into probabilistic design methods and their application to the lifetime analysis of turbine blades. As an example, a probabilistic design approach to a cooled turbine blade is applied. The loads of the blade are simulated using a full 3D finite element model. In particular, the influence of the scatter in material data, uncertainties in the thermal loading and manufacturing tolerances are taken into account. As a result, the scatter of low cycle fatigue (LCF) life due to the stochastic variables as well as the sensitivity of the design is presented.

reference:

XXXV. Kraftwerkstechnisches Kolloquium: ´Turbomaschinen in Energieanlagen´, Dresden, 23.-24. September 2003.