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矢量推力台架各向同性及灵敏度分析

吴锋 袁占斌 张有

吴锋, 袁占斌, 张有. 矢量推力台架各向同性及灵敏度分析[J]. 航空动力学报, 2020, 35(7): 1353-1360. doi: 10.13224/j.cnki.jasp.2020.07.002
引用本文: 吴锋, 袁占斌, 张有. 矢量推力台架各向同性及灵敏度分析[J]. 航空动力学报, 2020, 35(7): 1353-1360. doi: 10.13224/j.cnki.jasp.2020.07.002
WU Feng, YUAN Zhanbin, ZHANG You. Analysis on isotropy and sensitivity of vector thrust stand[J]. Journal of Aerospace Power, 2020, 35(7): 1353-1360. doi: 10.13224/j.cnki.jasp.2020.07.002
Citation: WU Feng, YUAN Zhanbin, ZHANG You. Analysis on isotropy and sensitivity of vector thrust stand[J]. Journal of Aerospace Power, 2020, 35(7): 1353-1360. doi: 10.13224/j.cnki.jasp.2020.07.002

矢量推力台架各向同性及灵敏度分析

doi: 10.13224/j.cnki.jasp.2020.07.002
基金项目: 陕西自然科学基金(2020JM-153); 重点实验室基金(N2018KE0080)

Analysis on isotropy and sensitivity of vector thrust stand

  • 摘要: 为了对矢量推力台架进行结构参数设计与优化,进行了台架的各向同性和灵敏度分析。考虑到各向同性和对称性密切相关,提出了矢量推力台架中测力单元对称分布定义,并推导了对称分布下,测力单元坐标满足的特征方程。基于1阶静力影响系数矩阵的条件数这一指标对测力单元对称分布的六分力台架进行了各向同性分析,发现对称六分力台架2∶2∶2构型可具有完全各向同性,而3∶2∶1构型只能具有力矩各向同性;并经过优化分布半径和方位角得到理想2∶2∶2构型需满足rx=ry=rz和(θx,θy,θz)=(0°,90°,180°)或(90°,180°,270°),理想3∶2∶1构型需满足rx=3rz/2和θx=0°。研究了两种实际台架和两种理想台架的联系和区别,并通过对实际台架进行各向同性和灵敏度分析,发现台架具有力或者力矩各向同性会导致力或者力矩灵敏度也具有各向同性;力和力矩灵敏度都与相关联的测力单元的弹性杆柔度成正比,力矩灵敏度与相关联的测力单元分布半径成反比。该研究方法和结论对设计与建造推力矢量发动机测力台架具有一定的理论与方法方面的指导意义。

     

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出版历程
  • 收稿日期:  2019-12-19
  • 刊出日期:  2020-07-28

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