固体发动机振动试验典型工况下的螺栓连接计算模型及验证  

Calculation model and verification of bolt connection under typical working conditions in solid propellant motor vibration test

作　　者：雷兵 刘兵 翟晓 张龙飞 王潇奕 杜昱坤 LEI Bing;LIU Bing;ZHAI Xiao;ZHANG Longfei;WANG Xiaoyi;DU Yukun(Xi’an Aerospace Propulsion Testing Technology Research Institute,Xi’an 710025,China)

机构地区：[1]西安航天动力测控技术研究所,西安710025

出　　处：《航天器环境工程》2024年第4期489-496,共8页Spacecraft Environment Engineering

摘　　要：固体发动机振动试验卧式工况下,连接振动试验工装的螺栓主要承受横向振动载荷而难免出现松动现象。为解决这一影响试验有效性的工艺问题,采用斜面滑块模型分析螺栓松动机理,并通过电磁振动台在固体发动机振动试验典型卧式工况下进行试验验证,给出常用的M16螺栓的连接安装预紧力与试验横向载荷幅值的建议比值。研究结果表明,固体发动机振动试验典型卧式工况下,要保证发动机在振动试验过程中(通常不超过10 min)的螺栓连接可靠,螺栓连接安装预紧力与横向振动载荷幅值的建议比值为12。该研究结果可为固体发动机振动试验工装设计过程中螺栓孔径大小及数量的选取提供参考,为试验工艺技术改进提供支撑。The bolts connecting the vibration test fixtures are mainly subjected to lateral vibration load and inevitably loosen under the horizontal working condition in solid propellant motor vibration test.To address the process issues affecting the effectiveness of the test,the mechanism of bolt loosening was analyzed by an inclined slider model.Test validation was carried out through electromagnetic shocker under typical horizontal working condition of the solid propellant motor vibration test.The recommended ratio of the connection installation pretightening force to the test lateral load for commonly used M16 bolts was given.The results show that under the typical horizontal working condition in the solid propellant motor vibration test,to ensure the reliability of bolt connection during the vibration test(usually not exceeding 10 min),the recommended ratio of the connection installation pre-tightening force to the test lateral vibration load for commonly used M16 bolts is 12.The proposed research may provide not only a reference for the selection of bolt aperture and quantity in the fixture design for solid propellant motor vibration test but also support for the improvement of related test technology.

关 键 词：固体发动机 振动试验 螺栓松动 横向振动载荷 预紧力 

分 类 号：V475[航空宇航科学与技术—飞行器设计] V465.2