Abstract:

On the basis of a traditional evolutionary algorithm, a new method of crack fault diagnosis is discussed. The method uses the inherent frequencies as crack diagnostic parameters. According to the intersection point of frequency contour lines and the forecasted results of MEP, the structural crack position is located. The results show that the method can effectively integrate bothadvantages and achieve rapid and accurate location of the crack.

Key words: crack fault diagnosis; inherent frequency; multiexpressionprogramming (MEP); frequencies contour lines