起落架缓冲器螺纹连接结构计算方法研究  

Research on Calculation Method of Threaded Connection Structure in Landing Gear Buffer

作　　者：李志鹏 李福 宋得军 李洁 LI Zhi-peng;LI Fu;SONG De-jun;LI Jie(Structure Department of Shenyang Aircraft Design and Research Institute,Liaoning Shenyang 110035,China)

机构地区：[1]沈阳飞机设计研究所结构部,辽宁沈阳110035

出　　处：《机械设计与制造》2024年第11期269-273,共5页Machinery Design & Manufacture

基　　金：总装共用技术(41423050113)。

摘　　要：对起落架缓冲器螺纹连接结构计算方法进行了研究。通过试验验证发现了飞机设计手册第9册中关于螺纹剪切强度计算的局限性,重新推导了薄壁螺纹剪切强度计算公式中关于螺纹充满度系数的计算公式,修正了飞机设计手册中关于螺纹充满度系数的计算公式。根据重新推导的薄壁螺纹剪切强度计算公式计算的结果与试验进行对比,结果表明理论计算结果与试验结果吻合。同时研究了公差和螺距对薄壁螺纹结构剪切强度的影响,并进行了试验验证。结果表明试验与理论计算结果吻合,加强薄壁螺纹结构剪切强度的方法可行有效。Calculation method of thread connection structure of landing gear buffer is studied.Through test verification,the limitation of the thread shear strength calculation in aircraft design manual Vol.9 is found.Therefore,the calculation formula of thread fullness factor in the shear strength formula of thin-walled thread is re-calculated,and the calculation formula of thread fullness factor in aircraft design manual is revised.According to the new calculation formula of thin-walled thread shear strength,the calculation results are compared with the experimental results,and the results show that the theoretical calculation results are consistent with the experimental results.The influence of tolerance and pitch on the shear strength of thin-walled thread structure is studied and verified by experiments.The results show that the experimental results are in good agreement with the theoretical results.The method of strengthening the shear strength of thin-walled thread structure is feasible and effective.

关 键 词：薄壁螺纹结构 剪切强度 螺纹充满度系数 公差 螺距 

分 类 号：TH16[机械工程—机械制造及自动化] V226[航空宇航科学与技术—飞行器设计]