基于ANSYS LS-DYNA水下爆破阻波帘的设计与研究

Design and Research of Wave Blocking Curtain for Underwater Blasting based on ANSYS LS-DYNA

水下爆破试验危险性大、成本高,在实验室进行相关试验项目对设备和场地的要求非常严格,每次试验都要按照相关程序进行审批。针对目前爆破试验程序繁琐及等待周期长等现状,以水下爆破防护为研究对象,应用碰撞振动仿真技术设计水下爆破阻波帘,使设计的产品在尽可能少的水下试验次数下达到满意的效果。采用ANSYS LS-DYNA模块,使用不同材料做成的阻波帘进行防护仿真。在距爆炸点5 m,压强为7.5 MPa的位置进行数据采集,对比分析帆布阻波帘与其他5种不同材料的阻波帘的爆轰波减小系数。仿真结果表明,阻波性能从高到低排序为:空气泡、多孔铝板、汽车轮胎、泡沫塑料、石棉布。其中空气泡的阻波帘,在1 kg TNT当量工况条件下,距爆炸点5 m,压强为0.22 MPa处,压强降低率达到97%,防护效果最好。

Underwater blasting tests are dangerous and costly.The requirements for the related test equipment and site in laboratory are very strict.Each test must be approved in accordance with relevant procedures.In view of the current situation of cumbersome blasting test procedures and long waiting periods,a wave barrier curtain which can achieve satisfactory results with as few underwater blasting tests was designed by using collision and vibration simulation technology.In order to achieve this purpose,the protection of wave barriers made of different materials were simulated by the ANSYS LS-DYNA module.Data were collected at a position 5 m away from the explosion point with a pressure of 7.5 MPa,and the detonation wave reduction coefficients of the canvas wave blocking curtain and other five different materials were compared and analyzed.The simulation results showed that the wave resistance performance in order from high to low is:air bubble,porous aluminum plate,automobile tire,foamed plastic,asbestos cloth.Among them,under the equivalent working condition of 1 kg TNT,and at the location 5 m away from the explosion point with a pressure of 0.22 MPa,the air bubble′s pressure reduction rate reached 97%,and the protection effect was the best.