Crack Detection of Fan Blade Based on Natural Frequencies

الملخص EN

A simple method was developed to detect damage based on a discrete mathematical model for fan blades using changes in natural frequencies combined with a fluid-structure analysis.

In addition, a numerical approach was developed for the fluid-structure analysis.

The results of numerical simulation provided the natural frequency data for each mode under different locations and sizes of a single crack in a blade.

A fault database was built using Matlab.

The damage of a blade was detected using the changes in natural frequencies.

This study will assist in investigating the effect of a crack on a structure from different perspectives; the simulation results show the effectiveness of this approach.