Dynamic non-linear analysis of a cracked blade

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Abstract

A cracked blade non-linear dynamic analysis was performed, taking into account contact interaction between crack sides. The contact-induced non-linear problem was solved by using the harmonic balance method. Accuracy and computational efficiency are demonstrated by comparing the results with the time integration of the system's motion equation Problem size reduction was performed using system fixed-interface method. They suppose that a crack forms an interface between two sub-structures and use a relative degree of freedom to describe the motion of crack sides. The influence of centrifugal forces was investigated in order to understand the necessity of problem non-linear formulation depending on crack location and frequency of rotation.

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Kulyk, M., Kucher, O., Kharyton, V., Laine, J. P., & Thouverez, F. (2008). Dynamic non-linear analysis of a cracked blade. Aviation, 12(3), 66–79. https://doi.org/10.3846/1648-7788.2008.12.66-79

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