高碧祥,徐诗峰,张镇麟,廖波,周建平,郭敏华.某带泡沫护帽的筒装导弹跌落仿真分析[J].包装工程,2020,41(9):149-154.
GAO Bi-xiang,XU Shi-feng,ZHANG Zhen-lin,LIAO Bo,ZHOU Jian-ping,GUO Min-hua.Drop Simulation Analysis of the Barreled Missile with Foam Helmet[J].Packaging Engineering,2020,41(9):149-154. |
| 某带泡沫护帽的筒装导弹跌落仿真分析 |
| Drop Simulation Analysis of the Barreled Missile with Foam Helmet |
| 投稿时间：2019-07-31 修订日期：2020-05-10 |
| DOI：10.19554/j.cnki.1001-3563.2020.09.022 |
| 中文关键词: 泡沫护帽 筒装导弹 跌落试验 仿真分析 |
| 英文关键词: foam helmet barreledmissile drop test simulation analysis |
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| 中文摘要: |
| 目的 验证某肩扛发射的筒装导弹在0.5 m跌落工况下聚氨酯泡沫护帽的缓冲效能。方法 对筒弹进行0.5 m无损跌落试验，发现挡销块被剪切破坏，通过固定在弹体上的加速度传感器，得到弹体加速度数据；然后通过有限元仿真软件Ansys/LS-DYNA模拟筒装导弹的跌落过程，分别得到挡销块应力分布及弹体加速度数据。结果 挡销块某区域应力超过其材料强度极限，从而发生单元失效，与试验现象一致；弹体在弹轴方向上的加速度最大值为200g，与试验值183g的误差为9.3%，表明建立的仿真模型合理有效。根据此模型对提出的2种改进优化方法的有效性进行了仿真验证。结论 通过试验与仿真对比建立合理有效的有限元仿真，验证了更改挡销块材质及加厚护帽，均可满足在0.5 m跌落环境下的强度要求，为产品下一步的改进优化提供了有效建议，可提升产品的研制效率，节约试验成本。 |
| 英文摘要: |
| The work aims to verify the buffer effectiveness of shoulder-fired barreled missile's polyurethane foam helmet in 0.5 m drop test. The test show that the stopper pin block was shear failure and the test obtained the missile acceleration data by acceleration sensor fixed on the projectile. Then, the drop process was simulated by the finite element simulation software Ansys/LS-DYNA to respectively obtain the stress distribution of stopper pin block and the acceleration data of missile body. The stress in some area of the stopper pin block exceeded its material strength limit, resulting in the element failure, which was consistent with the test phenomenon. The maximum acceleration of missile body in the axis direction was 200g, with a deviation of 9.3% compared with the test value (183g), which indicated that the established simulation model was reasonable and effective. According to this model, the effectiveness of the two improved optimization methods was verified by simulation. Finally, a reasonable and effective finite element model is built through the comparison of experiment and simulation, and it is verified that changing the block material and thickened helmet can meet the strength requirement of 0.5 m drop, so as to provide effective suggestions for the further optimization of the product, improve the product development efficiency and save the test cost. |
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