二维爆破地震波作用下三自由度弹性结构的动力响应

以二维爆破地震波作用下的三自由度弹性结构体系为研究对象,运用Matlab编程实现用时程分析方法求解该体系的动力响应。通过分析各种情况下的结构响应幅值结果,探讨了爆破振动幅值、频率、持续时间等爆破振动三要素对二维爆破地震波作用下三自由度弹性结构动力响应的影响,并得出一些有益的结论。可为建立多维爆破地震波作用下结构物的多参数安全判据,提供参考。

DYNAMIC RESPONSE OF THREE-FREEDOM ELASTIC STRUCTURE TO TWO-DIMENSIONAL BLASTING SEISMIC WAVES

By taking a three-freedom elastic structure under two-dimensional blasting seismic waves as investigating subject,this paper developed a solution to getting its dynamic responses with the use of time history analysis method which was assisted by Matlab programming.Based on analyzing the results of peak values of structural dynamic responses under different conditions,effects of three blasting vibration factors including peak value,frequency and duration on the dynamic response of a three-freedom elastic structure to two-dimensional blasting seismic waves,were discussed and several useful outcomes were presented.The present paper offered references to the establishment of multi-parameter safety criterion for multi-dimensional blasting seismic waves.