Uncertainty Analysis Of Slope Response To Seismic By Using Ultrasonic Wave Field Measurement

In this paper,the ultrasonic simulation method to meet the similarity criterion and simulate the seismic response of high slope is introduced in detail.By using the longitudinal transducer to stimulate and receive the vibration signal of the two-dimensional model,the distribution of wave field inside the slope model is quantitatively studied.The source of uncertainty in the ultrasound simulation experiment was analyzed according to the GUM(Guide to the Uncertainty in Measurement)method,and the uncertainty of each link was evaluated through targeted experiments.Concrete suggestions were made for further improvement of the experimental scheme;Comparing the original data collected from the slope model experiment and the maximum amplitude contour map with randomly varying data in the range of relatively extended uncertainty,the reliability of the ultrasound simulation experiment method was evaluated.Through the above research,this article has obtained the following understanding:1.The relative uncertainty of the excitation end of the wave is "0.834%",the relative uncertainty of the fluctuation receiving end of the P wave and SV wave is "0.734%",the relative uncertainty of the fluctuation receiving end of the SH wave is "0.582%",and the relative record end of the instrument is relative.The uncertainty is "5.537%".The main source of uncertainty is the factory error of the instrument.2.The synthesis of the maximum amplitude values of the ultrasonic simulation P wave and SV wave is relatively uncertain 5.647%,and the relative uncertainty of the synthesis of SH wave maximum amplitude value is 5.629%.Finally,the relative expanded uncertainty of the maximum amplitude of the P-wave and SV wave is 11.294%,and the relative expanded uncertainty of the SH-wave maximum amplitude value is 11.258%.3.Considering that the maximum amplitude contour map of the slope data collected randomly in the [y-Urel,y+Urel] range is different from the maximum amplitude contour map of the original data.The pattern of field distribution remains the same.The three conclusions obtained by the ultrasound simulation experiment are not affected by the uncertainty: 1 The interior of the model will have a strong and weak interval distribution belt that is vertical and parallel to the incident direction.2 The same slope surface morphology,the greater the incident angle,the more energy inside the model.Small;3 Energy within the model at the same incident angle: Convex> Straight> Slope.The ultrasonic simulation experiment method is reliable,can effectively measure the internal vibration data of the model,and analyze the wave field distribution of the model.