高锁螺母收口、装配及松动过程有限元分析  

Finite Element Analysis for Extrusion,Assembly and Loosening Processes of Hi-lock Nuts

作　　者：张京东 邓博 桂学文 李健 廖日东[1] ZHANG Jingdong;DENG Bo;GUI Xuewen;LI Jian;LIAO Ridong(School of Mechanical Engineering,Beijing Institute of Technology,Beijing,100081;China Aviation Industry Standard Parts Manufacturing Co.,Ltd.,Guiyang,550014)

机构地区：[1]北京理工大学机械与车辆学院,北京100081 [2]中国航空工业标准件制造有限责任公司,贵阳550014

出　　处：《中国机械工程》2023年第12期1387-1394,1406,共9页China Mechanical Engineering

基　　金：国家自然科学基金重点项目(U2141217)。

摘　　要：针对UNJ螺纹高锁螺母开展了有限元建模方法研究,编写了可生成结构化网格的建模程序,并建立了精细的有限元网格模型。对高锁螺母的收口过程、装配过程及受到横向载荷下的松动行为进行了有限元仿真,并通过拧紧试验对仿真得到的锁紧力矩值进行了验证。仿真结果表明:在一定收口量范围内,高锁螺母的最大径向位移量以及锁紧力矩均与收口量近似满足线性关系,且随着收口量的增大,最大径向位移量与锁紧力矩均增大;高锁螺母的锁紧力矩越大对应防松性能越好,然而收口量对防松性能存在最优值,当收口量超过最优值后,继续增大收口量对防松性能的提升效果并不显著。The FE(finite element)modeling method of UNJ threaded hi-lock nuts was investigated,and a modeling program was written to generate structured meshes,through which the fine FE meshed model was established.The extrusion process,assembly process and loosening behavior under transverse loads of hi-lock nuts were simulated by finite element method(FEM),and the simulated locking torque was verified by tightening tests.The simulation results show that within a certain range,the maximum radial displacement and the locking torque of the hi-lock nuts are linearly related to the extrusion amount approximately.With the extrusion amount increases,the maximum radial displacement and the locking torque both increase.The higher the locking torque of the hi-lock nuts,the better the anti-loosening performance.However,there is an optimal value of the extrusion amount for the anti-loosening performance.Once the extrusion amount exceeds the optimum value,increasing the amount of extrusion does not have a significant effect on the improvement of the anti-loosening performance.

关 键 词：高锁螺母 收口 锁紧力矩 防松性能 

分 类 号：V229[航空宇航科学与技术—飞行器设计]