薄壁金属管在中高速冲击下的缓冲特性研究
发布时间：2018-07-14 14:09
【摘要】：薄壁金属管塑性变形缓冲器通过塑性变形吸收能量,是冲击动力学领域所用缓冲器之一。通过试验和数值模拟研究了薄壁金属管塑性变形缓冲器在中高速冲击下的缓冲特性。通过空气炮试验,得到了薄壁金属管在中速冲击下的变形特点及缓冲力,分析了薄壁金属管在中高速冲击下的变形机理。研究了薄壁金属管半锥角、冲击速度、冲击质量对薄壁金属管缓冲性能的影响。结果表明:随着冲击速度的提高(30m/s~500m/s),缓冲力稳定性降低,缓冲力波动范围从8.2k N提高到19.9k N,最大缓冲力从19.9k N提高到34k N;半锥角不同会影响薄壁金属管的最大缓冲力;当冲击速度大于100m/s时,薄壁金属管缓冲力稳定性不受冲击质量影响。
[Abstract]:Thin-walled metal tube plastic deformation buffer absorbs energy through plastic deformation and is one of the buffers in the field of impact dynamics. The buffering characteristics of thin wall metal tube plastic deformation buffers under moderate and high speed impact were studied by experiment and numerical simulation. The deformation characteristics and cushioning force of thin-walled metal pipe under medium speed impact were obtained by air gun test. The deformation mechanism of thin-walled metal pipe under medium and high speed impact was analyzed. The effects of semi-cone angle, impact velocity and impact mass on the buffer performance of thin-walled metal tubes were studied. The results show that with the increase of impact velocity (30m/s~500m/s), the stability of buffer force decreases, the fluctuation range of buffer force increases from 8.2 KN to 19.9kN, the maximum buffer force increases from 19.9kN to 34kN, and the maximum buffer force of thin-walled metal pipes is affected by different semi-cone angles. When the impact velocity is greater than 100m/s, the buffer force stability of thin wall metal tube is not affected by impact mass.
【作者单位】： 中北大学机电工程学院;中北大学地下目标毁伤技术国防重点学科实验室;
【基金】：兵器装备预先研究项目(63206050401) 山西省留学人员科技活动择优资助项目(5386046750)
【分类号】：O347
本文编号：2121893
[Abstract]:Thin-walled metal tube plastic deformation buffer absorbs energy through plastic deformation and is one of the buffers in the field of impact dynamics. The buffering characteristics of thin wall metal tube plastic deformation buffers under moderate and high speed impact were studied by experiment and numerical simulation. The deformation characteristics and cushioning force of thin-walled metal pipe under medium speed impact were obtained by air gun test. The deformation mechanism of thin-walled metal pipe under medium and high speed impact was analyzed. The effects of semi-cone angle, impact velocity and impact mass on the buffer performance of thin-walled metal tubes were studied. The results show that with the increase of impact velocity (30m/s~500m/s), the stability of buffer force decreases, the fluctuation range of buffer force increases from 8.2 KN to 19.9kN, the maximum buffer force increases from 19.9kN to 34kN, and the maximum buffer force of thin-walled metal pipes is affected by different semi-cone angles. When the impact velocity is greater than 100m/s, the buffer force stability of thin wall metal tube is not affected by impact mass.
【作者单位】： 中北大学机电工程学院;中北大学地下目标毁伤技术国防重点学科实验室;
【基金】：兵器装备预先研究项目(63206050401) 山西省留学人员科技活动择优资助项目(5386046750)
【分类号】：O347
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