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杆式天平轴向力元件测量梁夹角优化分析

闵夫 解真东 戴金雯 皮兴才 杨彦广

闵夫,解真东,戴金雯,等. 杆式天平轴向力元件测量梁夹角优化分析[J]. 实验流体力学,2022,36(X):1-7 doi: 10.11729/syltlx20210083
引用本文: 闵夫,解真东,戴金雯,等. 杆式天平轴向力元件测量梁夹角优化分析[J]. 实验流体力学,2022,36(X):1-7 doi: 10.11729/syltlx20210083
MIN F,XIE Z D,DAI J W,et al. Optimization analysis of modified axial force element of sting balance[J]. Journal of Experiments in Fluid Mechanics, 2022,36(X):1-7. doi: 10.11729/syltlx20210083
Citation: MIN F,XIE Z D,DAI J W,et al. Optimization analysis of modified axial force element of sting balance[J]. Journal of Experiments in Fluid Mechanics, 2022,36(X):1-7. doi: 10.11729/syltlx20210083

杆式天平轴向力元件测量梁夹角优化分析

doi: 10.11729/syltlx20210083
详细信息
    作者简介:

    闵夫:(1990—),男,湖北仙桃人,硕士,工程师。研究方向:高超声速气动力试验技术,光纤传感技术。通信地址:四川省绵阳市涪城区二环路南段6号(621000)。E-mail:minfu@cardc.cn

    通讯作者:

    E-mail:yangyanguang@cardc.cn

  • 中图分类号: V211.72;V211.752

Optimization analysis of modified axial force element of sting balance

  • 摘要: 针对天平轴向力受法向力干扰较大的问题,提出了一种竖直梁轴向力元件的改进结构。通过理论分析和有限元仿真,获得了轴向力/法向力作用下的轴向力元件变形情况,对结构进行受力分析,得到法向力作用下的轴向力测量梁的变形特点及变形原因。提出了一种改进的轴向力元件测量梁结构,测量梁与主梁的连接夹角为不等于90°的优化夹角,该夹角通过仿真结果中的法向力对轴向力的干扰输出与轴向力有效输出之比和该夹角的线性函数关系获得。对改进的天平轴向力元件的有限元仿真结果表明:与传统轴向力元件相比,改进结构的轴向力有效输出仅减小2.77%,但法向力对轴向力的干扰输出减小了99.32%。改进的轴向力元件具有良好的抗法向力干扰的效果,适用于具有大升阻比特性的飞行器风洞模型气动力试验要求。
  • 图  1  轴向力元件结构示意图

    Figure  1.  Schematic of an axial force element

    图  2  轴向力元件的应变计位置与惠斯通电桥

    Figure  2.  Position of strain gages on measuring sheets and the bridges

    图  3  轴向力/法向力作用下轴向力元件的变形(放大100倍)

    Figure  3.  Deformation of axial force element with 100 times magnifica-tion under axial force or normal force

    图  4  轴向力/法向力作用下的测量梁x向和y向位移仿真结果

    Figure  4.  Simulation results of x- and y-displacement under axial force or normal force

    图  5  轴向力/法向力作用下的测量梁受力分析

    Figure  5.  Force analysis of measuring sheet under axial force or normal force

    图  6  轴向力/法向力作用下测量梁改进结构的受力分析

    Figure  6.  Force analysis of modified measuring sheet under axial force or normal force

    图  7  网格模型与应变计仿真区域

    Figure  7.  Mesh model and strain gage areas of the axial force element

    图  8  轴向力/法向力作用下测量梁的输出随夹角变化的曲线

    Figure  8.  Axial force output with different deflection angle under axial force or normal force

    表  1  六分量载荷作用下轴向力元件测量梁应变

    Table  1.   Strain of axial force measuring element under six loads

    应变计编号A=200 NN=2000 NC=200 NM=50 N·mNb=20 N·mL=20 N·m
    应变输出/με1–218.10–714.20–11.80–32.70–205.90835.00
    2234.80–342.704.20–41.4070.20130.80
    3235.20–342.702.4039.9069.00129.50
    4–217.10–712.2013.4032.90–210.30829.50
    5–216.80–711.3012.00–32.80204.80–830.60
    6234.70–342.00–3.90–41.10–70.10–130.80
    7234.60–344.00–2.6040.20–68.00–132.00
    8–217.40–713.20–13.6032.80210.70–830.50
    下载: 导出CSV

    表  2  六分量载荷作用下轴向力元件输出

    Table  2.   Bridge outputs of axial force measuring element under six loads

    电桥输出/(10–3A=200 NN=2000 NC=200 NM=50 N·mNb=20 N·mL=20 N·m
    ΔUA1/U00.4530.3710.003–0.0010.278–0.702
    ΔUA2/U00.4520.369–0.0020–0.2770.699
    ΔUA0.9040.7400.001–0.0010.001–0.003
    下载: 导出CSV

    表  3  测量梁与支撑梁的尺寸及仿真网格参数

    Table  3.   Size of measuring sheets and supporting sheets

    测量梁支撑梁网格参数/mm
    数量y向高度/mm宽度/mm厚度/mm数量y向高度/mm宽度/mm厚度/mm应变计仿真区域测量梁和支撑梁主梁
    2 10 5 2 12 10 5 1 0.25 0.50 2.00
    下载: 导出CSV

    表  4  不同夹角的轴向力元件在6个分量载荷作用下的输出

    Table  4.   Axial force output with different deflection angle under six loads

    夹角/(° )轴向力输出ΔU/(10–3ΔUNUA
    A=200 NN=2000 NC=200 NM=50 N·mNb=20 N·mL=20 N·m
    85.00.855–0.1340–0.00100–0.157
    87.50.8970.2930–0.0030.001–0.0040.327
    90.00.9040.7400–0.0010.001–0.0030.818
    92.50.8801.1590.006–0.003–0.0010.0011.317
    95.00.8241.5000–0.00100.0011.820
    下载: 导出CSV

    表  5  优化夹角的轴向力元件在轴向力/法向力作用下的输出

    Table  5.   Axial force output with optimal deflection angle under axial force or normal force

    夹角/(° )轴向力输出ΔU/(10–3ΔUNUA
    A=200 NN=2000 N
    85.70.866–0.017–0.019
    85.80.879–0.005–0.005
    下载: 导出CSV
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出版历程
  • 收稿日期:  2021-08-04
  • 录用日期:  2021-08-31
  • 修回日期:  2021-08-27
  • 网络出版日期:  2022-01-10

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