LCR波法的有效检测深度及厚度非均布应力表征方法研究OA

The longitudinal critically refracted(LCR)wave method demonstrates significant advantages in non-destructive testing of structural stresses.However,the current LCR wave technique lacks a physically meaningful analytical relationship between effective detection depths and excitation frequencies of incident waves,and can-not be applied to measure non-uniform stress distributions along the component thickness.To address these limitations,an analytical expression for the correlation between effective detection depths and excitation fre-quencies in the LCR wave method-based stress measurements,was derived.A stepwise difference algorithm was proposed for characterizing non-uniform stress fields with the LCR wave method,and through numerical simula-tions to validate its effectiveness in measuring inhomogeneous stress distributions.