【摘要】 为研究深孔台阶爆破工况下,爆区中远端既有桔瓣式球型储罐振动响应问题,采用ANSYS/LSDYNA建立有限元模型,结合流固耦合算法,分析了不同起爆方式下球罐关键质点动态响应情况,重点研究了罐壁处不同质点的振动峰值速度和罐内储液对峰值速度的影响。结果表明:爆破地震所引起的振动破坏效应主要集中于球罐迎爆面罐壁与支柱连接处,其中罐壁与支柱连接处附近最为剧烈,易突破振速安全阈值,需要重点防护;采用延时起爆,减小药量等合理起爆方案可有效削弱爆破地震效应;适量调整罐内储液高度也可有效提高球罐自身的稳定性,起到有效的防护作用。更多还原

【Abstract】 In order to study the vibration response of the existing orange-like spherical tank at the far end of the blast zone under the condition of deep hole step blasting, the finite element model is established by ANSYS/LSDYNA, and the dynamic response of the key particle of the spherical tank under different initiation modes is analyzed by combining the fluid-structure coupling algorithm, the vibration peak velocities of different particles on the tank wall and the influence of liquid storage on the peak velocities are studied particularly. The results show that the vibration damage effect caused by blasting earthquake is mainly concentrated on the connection between the tank wall and the pillar on the blasting surface of the spherical tank, and the most severe is near the connection between the tank wall and the pillar, which is easy to break through the safety threshold of vibration velocity and needs to be protected. Reasonable initiation schemes such as delay initiation and reduction of charge can effectively weaken the blasting seismic effect. Appropriate adjustment of liquid storage height in the tank can also effectively improve the stability of the spherical tank itself and play an effective protective role.更多还原