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为进一步研究岩石冲击试验中波形整形技术对入射波的整形效果,获得岩石冲击试验理想加载波形,利用ANSYS/LS-DYNA有限元动力分析软件对SHPB试验入射波进行了数值模拟,得到了经不同材料、直径的单片式波形整形器和不同组合方式的联贴式波形整形器整形后的入射波波形。研究发现:在相同的打击速度下,不同直径的单片式T2紫铜波形整形器整形效果不同。将不同材料单片式整形器进行联贴,构建组合式波形整形器,并对其整形效果进行模拟,发现组合式波形整形器比单独采用相同材料和直径的单片式整形器效果更佳。采用不同直径的整形器进行联贴是获得岩石冲击试验理想入射波波形的有效手段。
In order to further study the shaping effect of the wave shaping technique on the incident wave in the rock impact test and obtain the ideal loading waveform of the rock impact test, the incident wave of the SHPB test is numerically simulated by ANSYS / LS-DYNA finite element analysis software, Material, diameter monolithic waveform shaper and different combinations of joint wave shaper shaping the incident wave. It is found that the monolithic T2 copper wave shapers with different diameters have different shaping effects under the same attack speed. The combination of different material monolithic shapers to construct a combined waveform shaper and to simulate the shaping effect shows that the combined waveform shaper is better than the single shaper with the same material and diameter alone. The use of plastic shakers of different diameters for joining is an effective means to obtain the ideal incident wave shape of the rock impact test.