柔性接头摆心漂移测量误差的理论与实验研究  

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

作　　者：张金尧 任军学[1] 薛牧遥 童悦 郑庆 ZHANG Jinyao;REN Junxue;XUE Muyao;TONG Yue;ZHENG Qing(School of Astronautics,Beihang University,Beijing 100191,China;Shanghai Space Propulsion Technology Research Institute,Shanghai 200125,China)

机构地区：[1]北京航空航天大学宇航学院,北京100191 [2]上海航天动力技术研究所,上海200125

出　　处：《航空动力学报》2024年第9期406-415,共10页Journal of Aerospace Power

基　　金：基础加强计划技术领域基金(2020JCJQJJ014)。

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。In order to quantitatively analyze the measuring error source of pivot point excursion for flexible joint,the pivot point excursion at different vector angles under 10 MPa vessel pressure was calculated using ANSYS software.According to the experimental results of flexible joint,the influences of pendulum rod deformation,horizontal displacement sensor push rod measurement error,push rod measurement error and horizontal deviation of vertical displacement sensor on the measurement results of pivot point excursion were studied respectively.In addition,the influence of the structural error of flexible joint was studied by simulations.Results showed that the measured pivot point excursion was in good agreement with the simulation after correcting four kinds of errors.The error sources in the measurement of pivot point excursion were confirmed,in which the push rod measurement errors of horizontal and vertical displacement sensors accounted for 65.98%of the cylindrical envelope height error,and 77.32%of the cylindrical envelope radius error,respectively.And these led to a great influence on the axial and radial drifts of flexible joint.Moreover,the structural error of flexible joint also affected the measurement of pivot point excursion.The distribution of pivot point excursion caused by the thickness error of elastomers and reinforcements was consistent.The results can provide a theoretical guidance for the error analysis of pivot point excursion measurement of flexible joint.

关 键 词：摆心漂移 柔性接头 误差分析 有限元分析 固体火箭发动机 

分 类 号：V431[航空宇航科学与技术—航空宇航推进理论与工程]