Effective Identification and Localization of Single and Multiple Breathing Cracks in Beams under Gaussian Excitation Using Time-Domain Analysis

The output response of any intact oscillatory system subjected to a Gaussian excitation is also in nature. On the contrary, when contains type underlying nonlinearity, signal definitely non-Gaussian. In beam structures, presence fatigue-breathing cracks significantly influences dynamic characteristics under excitation. such alters be nonlinear, and non-Gaussianity will arise. order examine features ability for detection localization fatigue cracks, several breathing crack identification scenarios beam-like structures are presented this paper. effects single multiple corresponding different boundary conditions on responses beams studied. results analyzed based higher-order time-domain transformations. Higher-order transformations, namely skewness kurtosis coefficients addition Shannon entropy, exploited provide details about response, which conventional second-order statistics cannot show. exhibit that proposed methods robust immune noise can detect localize with sensitivities.