Comparative Study On Ultrasonic Simulation And Numerical Simulation Of Slope Seismic Response

Earthquake disasters had caused great harm.The slope instability caused by earthquake disasters is the most serious.Therefore the research is very necessary to study on the slope instability.At present,seismic dynamic response of the slope of the physical simulation researches are focus on the shaking table model test method,but this method for high slope seismic dynamic response of unable to meet the requirements of similarity.Therefore,exploring meet fluctuations similar to the problems of the principle of slope seismic response ultra sound physical model experiment method is of great significance.This paper aims to analyze the dynamic response of the three typical flat and concave homogeneous slope of P dynamic wave under different incident angel.The numerical model of the same condition is established for the same condition as the physical model of the ultrasonic.The excitation waveform of the ultrasonic wave is used as the input waveform of the numerical simulation to get the wave field of numerical simulation corresponding with the ultrasonic physical simulation of slope seismic wave field,which to verify the response simulation of ultrasound wave simulation consistency wave field and numerical slope.Then establish the same size numerical model and prototype model after amplification by the similarity for the slope by using numerical software.The dynamic response of the slope model with weak seismic excitation to the incident plane P waves in different directions is simulated by the numerical method.Through the above work,this paper has made the following results and understanding:(1)Under the same condition,the ultrasonic physical simulation and numerical simulation of slope weak seismic wave field distribution has a certain similarity of dynamic response.The figures show that the energy intensity of the physical simulation and the numerical simulation under the condition of P wave oblique incidence is in agreement with the general distribution of the energy intensity.This result shows that slope conditions with numerical simulation can get the similar slope seismic responses to be done with ultrasonic physical simulation,on the other hand,it is proved that the rationality and feasibility of ultrasonic physical experiment.(2)By physical slope models under the same conditions with similar backwards the prototype slope,slope from weak to strong excitation of the numerical simulation results show that slope seismic wave field and seismic wave field basically similar,i.e.,slope of weak earthquake response and earthquake response is consistent,according to slope of weak earthquake response can know the slope of the strong earthquake response.It establishes the physical foundation for the feasibility of the ultrasonic simulation method of the slope seismic response.(3)With the inclination of the excitation angle,the energy distribution of the slope is gradually moving toward the bottom of the slope.By comparing the energy distribution map of the slope at the angle of incidence angle,it can be found that the size of the energy distribution of the slope is the smallest and the convex slope is the largest.(4)Comparison of P wave and SH wave incident on the same condition slope seismic response wave field.It can be seen that the two kinds of slope earthquake wave excitation response corresponding to the wave field distribution is basically the same,reveals the characters of slope on slope control response characteristics of earthquakes.In this paper,the physical rationality and feasibility of the seismic response of the slope is confirmed,and the value of the ultrasonic simulation method for the dynamic response of the slope is confirmed.