| 摘要 |
FIELD: physics. ^ SUBSTANCE: reception electroacoustic transducer is placed on the surface of the object under analysis. Natural freely-damping acoustic vibrations are excited in the analysis object through a short mechanical impact on its surface. The excited acoustic vibrations are picked up by the reception electroacoustic transducer. The experimental spectral characteristic of the analysis object is determined, after which, through numerical modeling for acoustic wave velocity values from the minimum possible to the maximum possible, N spectral characteristics of the model of the analysis object are calculated. For each calculated spectral characteristic and experimental characteristic of the analysis object, N coefficients of their mutual correlation are calculated, where N is an integer and NëÑ2, the maximum value of which determines the true acoustic wave velocity value. ^ EFFECT: higher accuracy of determining acoustic wave velocity in large concrete objects with an irregular shape. ^ 1 ex |
