| 止口螺栓连接结构解析建模与阻尼特性分析 |
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| 引用本文： | 于平超,赵芝梅,侯丽,陈果.止口螺栓连接结构解析建模与阻尼特性分析[J].航空动力学报,2021,36(12):2490-2502. |
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| 作者姓名： | 于平超 赵芝梅 侯丽 陈果 |
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| 作者单位： | 1.南京航空航天大学 民航学院，南京 211106 |
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| 基金项目： | 中央高校基本科研业务费（NT2020018）； 国家科技重大专项（2017-I-0008-0009）； 国家自然科学基金（52005252）；江苏省自然科学基金（BK20211187）； 航空科学基金（2020Z039052007） |
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| 摘 要： | 针对止口螺栓连接，论文从连接结构轴向拉压力学行为分析出发，提出了可模拟连接非线性刚度和阻尼耗散的扇区模型，基于此进一步构建了弯矩载荷下的非线性解析模型。通过与三维实体有限元模型计算结果的对比分析，验证了所提出模型的有效性，并揭示了连接的非线性刚度特性和迟滞阻尼特性。基于所提出模型研究了关键参数对止口螺栓的阻尼特性的影响规律，结果表明:连接的阻尼耗散能力随弯矩载荷幅值和摩擦因数的增加呈现先增加后降低趋势，而随止口紧度和法兰长度的增加单调增加；法兰长度除对连接的阻尼耗散存在一定影响外，还能显著降低连接结构的等效刚度。
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| 关 键 词： | 止口螺栓连接 迟滞回线 阻尼特性 损耗因子 解析力学模型 |
| 收稿时间： | 2021/6/12 0:00:00 |
Analysis on analytical modelling and damping characteristics of bolted joint structure with spigot |
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| YU Pingchao,ZHAO Zhimei,HOU Li,CHEN Guo.Analysis on analytical modelling and damping characteristics of bolted joint structure with spigot[J].Journal of Aerospace Power,2021,36(12):2490-2502. |
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| Authors: | YU Pingchao ZHAO Zhimei HOU Li CHEN Guo |
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| Affiliation: | 1.College of Civil Aviation，Nanjing University of Aeronautics and Astronautics，Nanjing 211106，China2.Commercial Aircraft Engine Company Limited，Aero Engine Corporation of China，Shanghai 200241，China |
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| Abstract: | For the bolted joint with spigot，a nonlinear model for the single region of bolted joint under axial loads was built.Based on this model，the nonlinear analytical model was further proposed to describe the behavior of joint under bending moment.By performing a comparison study with the finite contact element model，the accuracy of the analytical model was validated，meanwhile，the nonlinear stiffness and damping characteristics of the joint were highlighted.Finally，the influence law of key parameters on joints' damping characteristics was investigated.The results showed that the ability of damping dissipation of bolted joint firstly increased and then decreased with the increase of bending moment amplitude and friction coefficient，while the ability of damping dissipation increased for the increasing interference fit of spigot and flange length.More importantly，flange length can not only affect the damping characteristics，but also decrease the equivalent stiffness of bolted joint significantly. |
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| Keywords: | bolted joint with spigot hysteresis curve damping characteristic loss factor analytical model |
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