Effect analysis of blasting seismic wave frequency on dynamic response of a multi degrees of freedom elastic system

The measured blasting seismic waves and the ideal sine waves of different dominant frequencies were separately loaded on the three degrees of freedom elastic system in vertical direction.The dynamic response under excitation of each blasting seismic wave in vertical direction was calculated with central impulse method.The variation of peak values of the structural dynamic responses was analyzed to discuss the specific effect of blasting seismic wave frequency on dynamic response of the system.The results show that the first natural frequency of the structure has dominant effect on peak values of dynamic response of structure.Other dominant frequencies with a larger proportion of total energy should be taken into consideration in addition to the basic main frequency.