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柔性接头摆心漂移测量误差的理论与实验研究

张金尧 任军学 薛牧遥 童悦 郑庆

张金尧, 任军学, 薛牧遥, 等. 柔性接头摆心漂移测量误差的理论与实验研究[J]. 航空动力学报, 2024, 39(9):20220710 doi: 10.13224/j.cnki.jasp.20220710
引用本文: 张金尧, 任军学, 薛牧遥, 等. 柔性接头摆心漂移测量误差的理论与实验研究[J]. 航空动力学报, 2024, 39(9):20220710 doi: 10.13224/j.cnki.jasp.20220710
ZHANG Jinyao, REN Junxue, XUE Muyao, et al. Theoretical and experimental investigation on measurement error of pivot point excursion of flexible joint[J]. Journal of Aerospace Power, 2024, 39(9):20220710 doi: 10.13224/j.cnki.jasp.20220710
Citation: ZHANG Jinyao, REN Junxue, XUE Muyao, et al. Theoretical and experimental investigation on measurement error of pivot point excursion of flexible joint[J]. Journal of Aerospace Power, 2024, 39(9):20220710 doi: 10.13224/j.cnki.jasp.20220710

柔性接头摆心漂移测量误差的理论与实验研究

doi: 10.13224/j.cnki.jasp.20220710
基金项目: 基础加强计划技术领域基金(2020JCJQJJ014)
详细信息
    作者简介:

    张金尧(1997-),男,硕士,主要从事航空宇航推进理论与工程研究。E-mail:zjy920@buaa.edu.cn

    通讯作者:

    任军学(1980-),男,副教授,博士,主要从事航空宇航推进理论与工程研究。E-mail:rjx_buaa@sina.com

  • 中图分类号: V431

Theoretical and experimental investigation on measurement error of pivot point excursion of flexible joint

  • 摘要:

    为定量研究柔性接头摆心漂移测量的误差来源,利用ANSYS计算了接头在容压10 MPa、不同摆角下的摆心漂移。结合某柔性接头的实验结果分别研究了摆杆形变、水平位移传感器推杆测量误差、铅垂位移传感器推杆测量误差及铅垂传感器水平方向偏移这4种误差对摆心漂移的影响,并研究了柔性接头自身结构误差对于摆心漂移测量的影响。结果表明:修正4种误差后的测量结果与仿真结果吻合良好,证实了摆心漂移测量的误差来源,其中水平位移传感器推杆测量误差占柔性接头摆心漂移圆柱包络面高的总误差的65.98%,铅垂位移传感器推杆测量误差占接头摆心漂移包络面半径总误差的77.32%;柔性接头自身结构的误差也会影响摆心漂移的测量,弹性件与增强件厚度误差引起的散布趋势较为一致,结果可为柔性接头摆心漂移测量误差分析提供理论指导。

     

  • 图 1  速度瞬心(IVC)法原理图

    Figure 1.  Calculation method of instantaneous velocity center (IVC)

    图 2  中垂线相对(RPB)法原理图

    Figure 2.  Calculation method of relative perpendicular bisector (RPB)

    图 3  柔性接头摆心测量装置

    Figure 3.  Measurement device of pivot point for flexible joint

    图 4  柔性接头的有限元模型及加载

    Figure 4.  Finite element model and load of flexible joint

    图 5  2阶Ogden模型材料数据拟合对比图

    Figure 5.  Correlation of the second order Ogden model with test data

    图 6  7.2°摆角下柔性接头的位移云图

    Figure 6.  Displacement contour of flexible joint at 7.2° angle

    图 7  不同摆角下中垂线相对法和速度瞬心法仿真所得摆心漂移分布与实验结果对比

    Figure 7.  Distribution of pivot point excursion under various swing angle in comparison with experiment and simulation in the method of RPB and the method of IVC

    图 8  摆杆受力引起的挠度示意图

    Figure 8.  Deformation caused by force on pendulum rod

    图 9  水平位移传感器接触位置与摆杆中轴线间的距离引起的误差

    Figure 9.  Error caused by the distance between the contact position of the horizontal LVDT and the central axis of the pendulum rod

    图 10  实验中铅垂位移传感器的水平方向偏移

    Figure 10.  Horizontal deviation of vertical LVDT in the experiment

    图 11  依次修正各项误差前后不同摆角下的摆心漂移对比

    Figure 11.  Comparison of pivot point excursion distribution at various angle before and after correcting each error in turn

    图 12  修正误差后不同摆角下的摆心漂移与原测量结果及仿真计算结果对比

    Figure 12.  Comparison of the distribution of the pivot point excursion at various angle among correction,experiment and simulation results

    图 13  结构误差对于柔性接头摆心漂移的影响

    Figure 13.  Influence of the structural errors to the pivot point excursion of flexible joint

    表  1  橡胶本构模型材料参数

    Table  1.   Material parameter of elastomer

    本构参数 拟合值
    μ1/10−5 1.8366
    α1 10.303
    μ2 21.539
    α2 0.02659
    下载: 导出CSV

    表  2  柔性接头摆心漂移测量中的误差

    Table  2.   Measuring errors of pivot point excursion test for flexible joint

    δi,test/(°) δi/(°) wh-up,i/mm wh-down,i/mm ΔlhlR/mm Δlv/mm Δla/mm
    1.06 1.00 0.0814 0.0365 0.0895 0.030 0.0174
    2.21 2.10 0.136 0.0611 0.137 0.064 0.0366
    3.42 3.27 0.184 0.0826 0.257 0.078 0.0572
    4.63 4.45 0.235 0.105 0.284 0.067 0.0778
    5.92 5.70 0.290 0.130 0.241 0.067 0.0998
    7.35 7.07 0.366 0.164 0.230 0.040 0.124
    7.81 7.52 0.378 0.169 0.141 0.0292 0.132
    下载: 导出CSV

    表  3  柔性接头摆心漂移测量中各项误差的比重

    Table  3.   Proportion of errors in the test of pivot point excursion for flexible joint

    参数 误差比重/%
    wh-up,iwh-down-i ΔlhlR Δlv Δla
    圆柱
    包络面
    33.56 65.98 0.11 0.35
    半径 7.47 15.04 77.32 0.18
    下载: 导出CSV
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  • 收稿日期:  2022-09-20
  • 网络出版日期:  2024-01-25

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