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燃气冲破式易碎盖冲击载荷与变形预测

李仁凤 任锐 张翔 耿直 朱昭君

李仁凤, 任锐, 张翔, 等. 燃气冲破式易碎盖冲击载荷与变形预测[J]. 航空动力学报, 2024, 39(1):20230007 doi: 10.13224/j.cnki.jasp.20230007
引用本文: 李仁凤, 任锐, 张翔, 等. 燃气冲破式易碎盖冲击载荷与变形预测[J]. 航空动力学报, 2024, 39(1):20230007 doi: 10.13224/j.cnki.jasp.20230007
LI Renfeng, REN Rui, ZHANG Xiang, et al. Prediction of impact load and deformation of fragile cover with gas shock wave[J]. Journal of Aerospace Power, 2024, 39(1):20230007 doi: 10.13224/j.cnki.jasp.20230007
Citation: LI Renfeng, REN Rui, ZHANG Xiang, et al. Prediction of impact load and deformation of fragile cover with gas shock wave[J]. Journal of Aerospace Power, 2024, 39(1):20230007 doi: 10.13224/j.cnki.jasp.20230007

燃气冲破式易碎盖冲击载荷与变形预测

doi: 10.13224/j.cnki.jasp.20230007
基金项目: 河南省科技攻关项目(222102320165,232102220028)
详细信息
    作者简介:

    李仁凤(1989-),女,讲师、硕士生导师,博士,主要从事航天发射技术相关研究。E-mail:lirenfeng443@163.com

  • 中图分类号: V553;TJ768.2

Prediction of impact load and deformation of fragile cover with gas shock wave

  • 摘要:

    采用高精度数值模拟技术对开盖前发射箱内冲击波演化规律、后盖不同开盖时刻前箱盖载荷分布以及不同载荷加载方式下前盖承压变形进行了计算分析。研究结果表明:冲击波以约450 m/s的速度在箱内沿轴向传播,棱台箱盖中心区域压力大于斜面区域。后盖开盖时间距离发动机点火时间越长,燃气到达前盖的压力峰值越大,综合考虑箱内设备的安全与开盖可靠性,在0.95 ms时刻开盖时性能最优。通过对棱台型易碎前盖燃气载荷分布研究,应按照平台区域和斜面区域进行分区域变形预测,相比较平均载荷加载更有利于盖体薄弱部位设计。

     

  • 图 1  发射装置三维模型

    Figure 1.  Three-dimensional model of launcher

    图 2  网格模型

    Figure 2.  Mesh model

    图 3  总压曲线

    Figure 3.  Total pressure curve

    图 4  监测位置

    Figure 4.  Monitoring positions

    图 5  数值计算结果与实验结果纹影图对比(Rp=1.2)

    Figure 5.  Schlieren figure comparison between calculation results and experimental results (Rp=1.2)

    图 6  平板上相对压力对比(ZNP=2De

    Figure 6.  Comparison of relative pressure on plate (ZNP=2De

    图 7  计算模型

    Figure 7.  Computational model

    图 8  数值计算与实验结果对比

    Figure 8.  Comparison of numerical simulation and experimental results

    图 9  不同时刻发射装置内压力等值线

    Figure 9.  Pressure contours in launcher at different times

    图 10  各监测面平均压力曲线

    Figure 10.  Average pressure of monitoring surface

    图 11  前后盖不同位置压力

    Figure 11.  Pressure at different positions of the covers

    图 12  后盖开盖时刻

    Figure 12.  Rear cover opening time

    图 13  不同开盖时刻测面平均压力

    Figure 13.  Average pressure of monitoring surface at different opening times

    图 14  0.95 ms开盖对应前盖上监测点压力分布

    Figure 14.  Pressure distribution of monitoring points on the front cover at 0.95 ms cover opening

    图 15  前盖开盖前相对压力分布

    Figure 15.  Relative pressure distribution before opening the front cover

    图 16  不同加载方式下箱盖力学响应(变形放大系数为10)

    Figure 16.  Mechanical response of cover under different loading modes (deformation amplification factor is 10)

    表  1  GFRP材料参数

    Table  1.   Material parameters of GFRP

    参数数值参数数值
    E1/GPa24.535v230.3
    E2/MPa6550Xt/MPa713
    E3/MPa6550Xc/MPa448
    G12/MPa2436Yt/MPa35
    G23/MPa2436Yc/MPa90
    G13/MPa2436S12/MPa25
    v120.24S13/MPa25
    v130.24S23/MPa61
    下载: 导出CSV

    表  2  不同加载方式下箱盖局部位移及应力

    Table  2.   Local displacement and stress of cover under different loading modes

    项目峰值应力/MPa峰值位移/mm
    S1S2SaSbS1S2
    面平均加载结果A40.3621.1759.73111.733.241.69
    分区域加载结果B35.7135.0569.11108.612.582.90
    偏差(|AB|/B)/%13.0239.6013.572.925.5841.72
    下载: 导出CSV
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出版历程
  • 收稿日期:  2023-01-04
  • 网络出版日期:  2023-10-09

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