冲击载荷对飞机起落架螺纹连接的影响  

Effect of impact load on threaded connection of an aircraft landing gear

作　　者：缪宏[1] 左敦稳[1] 汪洪峰[1] 王红军[1] 

机构地区：[1]南京航空航天大学江苏省精密与微细制造技术重点实验室,南京210016

出　　处：《振动与冲击》2010年第2期208-211,共4页Journal of Vibration and Shock

基　　金：国家自然科学基金(50675104);国家863计划(SQ2008AA10XK1468859);江苏省精密与微细制造技术重点实验室开放基金(JSPM200705)

摘　　要：对近期民航飞机主起落架连杆插销螺栓失效原因进行分析,估计出飞机降落过程中插销螺栓承受的最大冲击载荷为698 MPa,采用Yamamoto方法分析计算得到插销螺栓每一个啮合螺纹的应力分布,利用有限元分析法建立了连杆插销螺栓连接的有限元模型,分析所有啮合螺纹的应力应变场。分析了冲击载荷对螺旋效果和螺纹啮合位置产生的影响,这为飞机起落架的校查及使用寿命预测提供了重要的依据。The failure cause of linkage-clevis bolts of main landing gear of a civil airplane was analyzed here,and it was estimated that the greatest impact load which a clevis bolt could bear was 698 MPa while landing.The stress distribution of each meshing thread of the clevis bolt was calculated and analyzed using Yamamoto method.The finite element model of the linkage-clevis bolt was built by means of finite element analysis method,and the stress and strain fields of all meshing threads were analyzed.The effect of the impact load on the threads and their meshing locations was analyzed.An important basis was provided for inspection and life prediction of an aircraft landing gear.

关 键 词：起落架 螺纹连接 连杆插销螺栓 冲击载荷 

分 类 号：V214.1[航空宇航科学与技术—航空宇航推进理论与工程]