A new method to calculate the vibrational stress of rotating blades

Abstract

A new reverse educing method (REM) is presented to estimate the vibrational stress on rotating aeroengine blades from the actual fracture section. This method does not conform to the traditional calculating method, but involves the reverse solution idea. The value of the crack propagation ratio da/dN can be obtained from the actual fracture section of the blade, and then the vibrational stress on rotating blades can be calculated through static computation, modal analysis and crack stress intensity factor calculation. The result is very significant for fault diagnosing and shooting of aeroengine blades.

Citation

Li, H., Zhang, X., Yan, X. and Nie, J. (2001), "A new method to calculate the vibrational stress of rotating blades", Aircraft Engineering and Aerospace Technology, Vol. 73 No. 1, pp. 26-30. https://doi.org/10.1108/00022660110366863