摘要
采用有限元软件对有炮孔模型和无炮孔模型这2种爆破模型进行数值模拟分析,并对2种模型的振动衰减规律和速度时程变化曲线进行比较分析。结果表明:有炮孔模型和无炮孔模型在软件中都能够实现,在爆源5m以外,2种模型的计算结果基本相似;随着距离的增大,2种模型的衰减规律及数值上的差异越来越小;但在5m以内时,无炮孔模型的计算结果更符合振动衰减规律;由于无炮孔模型的计算效率较有炮孔模型提高近40%,因此在该软件中进行爆破振动模拟时尽可能采用无炮孔模型。
The numerical simulation,the GTS NX,numerical simulation analysis was carried out on two types of blasting model.The vibration attenuation law and speed variation curve of the comparative analysis were also evaluated.The results showed that the model with and without hole model was both able to be created in the software.For an explosive source 5moutside,similar results were obtained.With the increase of distance,the attenuation law of two models and numerical differences are getting smaller,but within 5m,without-hole model calculation results agree with the vibration attenuation law.The without-hole model calculation efficiency increase nearly 40%than the with-hole model.It was without-hole model that was recommended for blasting vibration in the software simulation.
出处
《中国科技论文》
CAS
北大核心
2016年第7期813-817,共5页
China Sciencepaper
基金
重庆市研究生科研创新项目(CYS14166)
关键词
有限元
振动爆破
数值模拟
有炮孔模型
无炮孔模型
振动衰减规律
速度时程变化曲线
动力荷载
等效荷载
finite element
blasting vibration
numerical simulation
blasting model with hole
blasting model without hole
vibration attenuation law
speed variation curve
dynamic loading
the equivalent load
