Finite element analysis of dynamic response on blasting vibration in slope excavation of a hydroelectric power station

It was effective and feasible to utilize ANSYS software to imitated analysis although dynamic response to the slope blasting excavation was extremely complicated.Simple method and establishment way were introduced in detail of high steep slope computation model of a hydroelectric power station.Finite element of ANSYS,stress response,displacement response and speed response were analyzed this slope blasting excavation by utilizing the transformed accelerated time interval curve from the test speed time interval of blasting vibration as the calculating loads.The results of model analysis indicated that the resonance phenomenon would not occur because the slope inherent frequency is well lower than the main frequency of blasting vibration.The results of time interval analysis indicated that various kinds of stresses had stresses concentration phenomenon in slope bottom although the maximum speed of blasting vibrations exceeded the standard one,and any plastic shape did not create in slope although each stress was less,and it couldn’t make the slope be destroyed wholly if we considered only the dynamic impact of blasting vibration.At the same time obvious speed magnifying effect and inertia hysteretic effect appeared with the increase of the blasting scale.