高填方路堤土中爆破数值模拟

 由于进行多次、大规模爆破成腔试验研究存在一定难度,本研究采用爆炸流体动力学数值分析方法,模拟土中爆腔形成和周围土体挤密效果。对现场爆破试验采集到的爆炸波波速进行分析,推导出土壤的相关参数,然后采用基于ANSYS/LS-DYNA中多物质ALE 算法,对土中爆破成腔进行分析,得到爆腔大小与土体压实度关系以及爆腔周围土体密度随爆心距变化关系,爆破成腔数值模拟结果与现场爆破试验结果具有较好的一致性。

Numerical Simulation of Blasting in Highly Filled Embankment Soil

Since there is a certain degree of difficulty to carry out a large number of large-scale blasting experiment studies, this paper uses an explosive fluid dynamics numerical analysis method to simulate the explosion cavity formation and the effect of soil compaction around the explosion cavity. First the explosion wave velocity collected from blasting test are analyzed to derive the relevant parameters of the soil, and then with the ANSYS/LS-DYNA ALE algorithm for multiple materials, the problem about blasting the cavity of the soil is analyzed. The relation between the explosion chamber and the degree of compaction of soil before blasting, and how the soil density around the explosion chamber changes with the blasting distance are obtained. There is a good agreement between the blasting results of numerical simulation and field blasting test results.