摘要
螺纹连接被广泛应用于机载电子设备中。某机载电子设备在冲击试验中,连接隔振器的螺钉出现松动。文中首先提出了引起该设备螺钉松动的宏观原因,主要是冲击响应过大和连接螺钉太小,仿真分析发现,螺钉至少增大为M10才能满足强度要求。考虑到仿真误差和强度余量,同时提出更换大阻尼隔振器的改进措施,改进后的设备顺利通过冲击试验。文中针对螺钉松动进行的原因分析和改进措施对同类型电子设备螺钉和隔振器选型具有一定的借鉴意义。
Threaded connection is widely applied to airborne electronic equipment.The screws attached to the isolator are loose in the shock test of some equipment.This paper firstly puts forward the macroscopic reasons for the loosening of the device screw,mainly because the shock response is too large and the connecting screw is too small.Through the simulation analysis,it is found that the screws need to be increased to at least M10 to meet the strength requirement.Considering the simulation error and the strength margin,the improvement measure of replacing with larger damping isolator is put forward,and the improved equipment passes the shock test successfully.The reason analysis and improvement measures for screw loosening in this paper are useful for the selection of screws and isolators of the same type of electronic equipment.
作者
刘杰
李佳
常选仓
冯志新
LIU Jie;LI Jia;CHANG Xuancang;FENG Zhixin(The 29th Research Institute of CETC,Chengdu 610036,China)
出处
《电子机械工程》
2020年第1期30-33,共4页
Electro-Mechanical Engineering
关键词
螺纹连接
电子设备
冲击响应
螺钉松动
threaded connection
electronic equipment
shock response
screw loosening
