基于有限元数值计算的爆破振动速度分析

爆破振动速度的预测一直是爆破震动危害控制的前提和基础,也是其研究的一个重要课题。本文在基于有限元数值模拟方法的基础上,对反映爆破震动强度的重要指标———质点振动速度的计算方法进行了探讨,并对空气和水两种不同间隔装药结构下的振动速度计算结果进行了对比分析。数值模拟结果表明,在爆心距不太大的情况下,计算结果与实测结果吻合较好,这对爆破设计与施工有一定的指导意义。

ANALYSIS OF BLASTING VIBRATION VELOCITY BASED ON THE FINITE ELEMENT NUMERICAL CALCULATION

Forecasting blasting vibration velocity is always a premise and basis in controlling blasting vibration damage,and therefore,is an important research subject in the field of blasting vibration control.In this paper the method of calculating the particle vibration intensity,an important index reflecting the blasting vibration intensity,was discussed based on the numerical simulation method of finite element,and this was followed by comparing analysis of the two different structures of decked charge with air and that with water.The results indicated that the velocity from the calculation was correspondent with the actual one in the area not far from the blasting center.The finding has instructive significance to the design and construction of blasting operation.