基于光纤测试技术的固体发动机壳体卡环接头复杂结构受力分析  

Mechanical behavior analysis on special snap ring joint structure of SRM case based on optical fiber sensing technology

作　　者：肖佳琳 刘浩 刘鎏 XIAO Jialin;LIU Hao;LIU Liu(The Institute of Xi’an Aerospace Solid Propulsion Technology,National Key Laboratory of Solid Rocket Propulsion,Xi’an 710025,China)

机构地区：[1]西安航天动力技术研究所,固体推进全国重点实验室,西安710025

出　　处：《固体火箭技术》2023年第4期621-628,共8页Journal of Solid Rocket Technology

摘　　要：针对固体火箭发动机壳体卡环接头复杂部位应力-应变分析问题,为解决因卡环接头结构特殊导致在复杂部位无法布设应变片或测量效果不理想的难题,采用光纤传感器对卡环接头结构进行局部应变测量并与有限元仿真结果、传统应变片测量结果进行对比。结果表明,与仿真结果对比测量误差不超过8.2%,与传统应变片测量结果对比误差不超过6%。光纤传感器测量法解决了卡环接头结构复杂隐蔽部位应变测量难题,揭示了卡环结构接头的应力-应变状态,为发动机故障的检测及预示提供基础。Due to the special structure of the snap ring joint,in order to solve the problem that the strain gauge cannot be laid in the complex parts or the measurement effect is not ideal,the fiber⁃optic sensor was used to measure the local strain of the snap ring joint structure,and the results were compared with the FEA and the traditional strain gauge measurement results.The results show that the measurement error is less than 8.2%compared with the simulation results;the error is less than 6%compared with the traditional strain gauge results.The strain measurement problem for complex parts of snap ring joint is solved by using the fiber⁃optic sensor.The stress and strain state of special snap ring joint is revealed,which provides the basis for detection and prediction of the solid rocket motor fault.

关 键 词：固体火箭发动机 卡环接头 应变分析 光纤传感器 

分 类 号：V435[航空宇航科学与技术—航空宇航推进理论与工程]