摘要
对球形爆源在弹性半空间内爆破引起地表质点的振动波形预测进行研究.利用等效孔穴理论,将球形药包的爆破简化为球腔压力源的作用,推导出球腔压力源p(t)作用下的等效震源强度函数;然后对Hoop点源理论的位移解进行修改,得到在球腔压力源p(t)的作用下地表质点的振动位移和速度函数;最后画出地表质点振动速度函数波形,并对波形进行拟合.根据萨道夫斯基公式和等效爆源强度函数,构造一个与装药量直接相关且更为简洁的质点振动速度函数.结果表明:构造函数与理论解得到的波形非常吻合,且验证了构造函数的适用性,实现爆破振动波形预测.
The prediction of vibration waveform of surface particles caused by spherical blasting source blasting is studied in elastic half space.The equivalent cavity theory is used to simplify the blasting of spherical charge to the action of spherical cavity pressure source,and the equivalent source intensity function under the action of spherical cavity pressure source p(t)is deduced.The displacement solution of Hoop point source theory is modified to obtain the vibration displacement and velocity function of surface particles under the action of spherical cavity pressure source p(t).The waveform of surface particle vibration velocity function is drawn and fitted.According to the sadovsky formula and the equivalent explosive source strength function,a more concise particle vibration velocity function directly related to the explosive charge is constructed.The results are consistent well with the waveform obtained by theoretical solution.The applicability of concise function is verified,the prediction of blasting vibration waveform is realized.
作者
刘小鸣
陈士海
LIU Xiaoming;CHEN Shihai(College of Civil Engineering,Huaqiao University,Xiamen 361021,China;Fujian Research Center for Tunneling and Urban Underground Space Engineering, Huaqiao University,Xiamen 361021,China)
出处
《华侨大学学报(自然科学版)》
CAS
北大核心
2018年第6期826-831,共6页
Journal of Huaqiao University(Natural Science)
基金
国家自然科学基金资助项目(11672112)
中央高校基本科研业务费专项资金资助项目(13BS402)
华侨大学研究生科研创新基金资助项目(17013086024)
关键词
球形药包
等效震源
地表运动
速度函数
曲线拟合
spherical charge
equivalent source
surface motion
velocity function
curve fitting