Siemens Energy, Inc.

Siemens Corporation

Nam Eung Kim

Shaohua Kevin Zhou

Jingdan Zhang

Nikolai R Tevs

Nancy H Ulerich

Xuefei Guan

A method dynamically reconstructing a stress and strain field of a turbine blade includes providing a set of response measurements from at least one location on a turbine blade, band-pass filtering the set of response measurements based on an upper frequency limit and a lower frequency limit, determining an upper envelope and a lower envelope of the set of response measurements from local minima and local maxima of the set of response measurements, calculating a candidate intrinsic mode function (IMF) from the upper envelope and the lower envelope of the set of response measurements, providing an N&#xd7;N mode shape matrix for the turbine blade, where N is the number of degrees of freedom of the turbine blade, when the candidate IMF is an actual IMF, and calculating a response for another location on the turbine blade from the actual IMF and mode shapes in the mode shape matrix.

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Jupiter, FL, United States of America

Nam Eung Kim