扰流板结构参数对冲击波衰减特性影响的仿真分析

摘要

在坑道内设置扰流板是加速爆炸冲击波衰减的有效方法.为探究扰流板结构参数对冲击波衰减特性的影响,采用ANSYS/LS-DYNA有限元软件进行仿真研究.基于流固耦合算法,建立Schardin实验等比模型,所得仿真结果与实验结果具有良好的一致性,验证了仿真模型的有效性.以某发射井坑道为研究对象,在矩形扰流板宽度一定的情况下,研究了扰流板厚度、倾角及间距对冲击波衰减规律的影响.结果表明:保持其他参数不变,随着扰流板厚度增加,冲击波超压衰减越来越明显;扰流板厚度为40cm时,倾角为105°、间距为6m最有利于冲击波衰减.研究结果可以为坑道防护设计提供有价值的参考.%Setting spoilers in the tunnel is an effective way to accelerate its shock wave attenuation.In order to investigate the influence of the spoiler structural parameters on its shock wave's attenuation,numerical simulation was carried out using the ANSYS/LS-DYNA finite element software.First,based on the fluid-solid coupling algorithm,the equal scale model of Schardin's experiment was established.The simulation results were found to be in good agreement with the experimental results,which verified the validity of the simulation model.Then the numerical method was used to investigate the influence of the spoiler thickness,inclination angle and interval on the shock wave attenuation in a silo tunnel when the rectangular spoiler width was a constant.The results show that when the other parameters remain the same,with the increase of the spoiler thickness,the overpressure attenuation of the shock wave becomes increasingly more obvious.When the spoiler thickness is 40 cm,the spoiler with the inclination angle of 105°and the interval of 6 m is the most beneficial condition for the shock wave attenuation.These results can provide valuable reference for the design of the tunnel protection.