某型飞机螺栓连接结构钉载分配特性研究  

Study on Pin Load Distribution of Bolted Joints for One Aircraft

作　　者：柳鸿飞 高玉魁 LIU Hongfei;GAO Yukui(School of Aerospace Engineering and Applied Mechanics,Tongji University,Shanghai 200092,China;School of Materials Science and Engineering,Tongji University,Shanghai 201804,China;Shanghai Key Laboratory of R&D for Metallic Function Materials,Shanghai 201804,China)

机构地区：[1]同济大学航空航天与力学学院,上海200092 [2]同济大学材料科学与工程学院,上海201804 [3]上海市金属功能材料开发应用重点实验室,上海201804

出　　处：《航空制造技术》2020年第23期64-71,101,共9页Aeronautical Manufacturing Technology

基　　金：国家自然科学基金(11372226)。

摘　　要：针对某型飞机螺栓连接结构的钉传载荷计算,提出了简化的弹簧–质点模型,并利用低预紧力螺栓连接结构验证了简化方法的可行性,同时分析了简化模型在高预紧力螺栓结构中产生较大误差的原因,通过对理论摩擦力进行折减,同时基于钉载分配相似性进行钉载修正,改进后的计算方法能够较好预测不同外载及不同预紧力下的钉载分配情况,为高预紧力多螺栓连接结构的工程简化计算提供了参考依据。A simplified spring–mass model was proposed to deal with the pin load distribution of bolted joints for one aircraft.The feasibility of simplified model was proven by a case of low pre-tightening force bolted joints.The reasons for huge error in the application of simplified model in high-torqued joint were analyzed.To solve the problem,a reduction coefficient of theoretical friction force and correction factors of pin load distribution based on similarity principle were used to modify the model.Results show that the modified model can greatly enhance the accuracy of predicting the pin load distribution of the reached structure with different applied loads and pre-tightening forces.This method provides a good reference for the simplified calculation of high pre-tightening force multiple-bolted joints.

关 键 词：钉载分配 弹簧-质点模型 有限元模拟 摩擦力 预紧力 

分 类 号：V229.1[航空宇航科学与技术—飞行器设计]