典型螺栓连接界面轴向动态特性的不确定性研究

PDF(1683 KB)

振动与冲击 ›› 2021, Vol. 40 ›› Issue (10) : 20-24.

论文

陈学前1,2，沈展鹏1,2，刘信恩1,2，范宣华1,2，胡杰1,2

作者信息 +

Uncertainty analysis on the normal dynamic characteristics of bolted joint interfaces

CHEN Xueqian1,2，SHEN Zhanpeng1,2，LIU Xin’en1,2，FAN Xuanhua1,2，HU Jie1,2

Author information +

文章历史 +

摘要

工程结构中普遍存在螺栓连接，其中螺栓连接界面的非线性与不确定性是其两个重要特性，该研究针对某典型螺栓连接界面轴向动态特性的不确定性开展研究。通过结构不同次装配工况的正弦振动试验，获得了系统轴向振动固有频率与模态阻尼比的不确定性。采用薄层单元建立螺栓连接结合面模型，基于薄层单元弹性模量、泊松比与连接系统固有频率的关系，以及薄层单元材料损耗因子与模态阻尼比的关系，再结合基于主成分分析(PCA)的不确定性有限元模型修正方法，利用螺栓连接系统的不确定性研究试验结果，对薄层单元的弹性模量、泊松比及材料损耗因子区间进行了识别。识别得到的螺栓连接轴向固有频率与模态阻尼比区间与试验结果区间吻合较好，研究结果为类似螺栓连接结构结合面动力学建模及其不确定性研究提供了新方法。

Abstract

Bolted joints are applied in engineering structures widely.Nonlinearity and uncertainty are two important features of bolted joint interfaces.The uncertainty of the normal dynamic characteristics of bolted joint interfaces was studied in the paper.The uncertainty of the natural frequencies and modal damping ratios of the structure under different assembly conditions was obtained by sine-sweep vibration experiments, and the joint interfaces were simulated by a finite element model with thin layer elements.The intervals of the elastic modulus, Poisson’s ratio and loss factor of the thin layer element were identified by combined use of the principal component analysis (PCA) and the uncertainty experimental results of the bolted joint system.The identified intervals of the natural frequency and modal damping ratio are in good agreement with those by experiments, which provides a new way to the dynamic modeling of joint interfaces and the uncertainty study on similar bolted joint structures.

导出引用

陈学前1,2，沈展鹏1,2，刘信恩1,2，范宣华1,2，胡杰1,2. 典型螺栓连接界面轴向动态特性的不确定性研究[J]. 振动与冲击, 2021, 40(10): 20-24

CHEN Xueqian1,2，SHEN Zhanpeng1,2，LIU Xin’en1,2，FAN Xuanhua1,2，HU Jie1,2. Uncertainty analysis on the normal dynamic characteristics of bolted joint interfaces[J]. Journal of Vibration and Shock, 2021, 40(10): 20-24

参考文献

［1］JIANG S Y, ZHENG Y J, ZHU H.A contact stiffness model of machined plane joint based on fractal theory［J］.Journal of Tribology, 2010,132(1): 011401.

［2］BRAKE M R.An analytical elastic-perfectly plastic contact model［J］.International Journal of Solids and Structures, 2012,49(22): 3129-3141.

［3］BRYANT M J, EVANS H P, SNIDLE R W.Plastic deformation in rough surface line contacts: a finite element study［J］.Tribology International, 2012,46(1): 269-278.

［4］张学良，陈永会，温淑花，等.考虑弹塑性变形机制的结合面法向接触刚度建模［J］.振动工程学报，2015,28(1): 91-99.
ZHANG Xueliang, CHEN Yonghui, WEN Shuhua, et al.The model of normal contact stiffness of joint interfaces incorporating elastoplastic　deformation mechanism［J］.Journal of Vibration Engineering, 2015,28(1): 91-99.

［5］张学良，范世荣，温淑花，等.基于等效横观各向同性虚拟材料的固定结合部建模方法［J］.机械工程学报，2017,53(15): 141-147.
ZHANG Xueliang, FAN Shirong, WEN Shuhua, et al.Modeling method of fixed joint interfaces equivalent transversely isotropic virtual material［J］.Journal of Mechanical Engineering, 2017,53(15): 141-147.

［6］ZHANG X L, WANG N S, LAN G S, et al.Tangential damping and its dissipation factor models of joint interfaces based on fractal theory with simulations［J］.Journal of Tribology, 2014,136(1): 011704.

［7］杨红平，傅卫平，王雯，等.基于分形几何与接触力学理论的结合面法向接触刚度计算模型［J］.机械工程学报，2013,49(1): 102-107.
YANG Hongping, FU Weiping, WANG Wen, et al.Calculation model of the normal contact stiffness of joints based on the fractal geometry and contact theory［J］.Chinese Journal of Mechanical Engineering, 2013,49(1): 102-107.

［8］田红亮，刘芙蓉，方子帆，等.引入各向同性虚拟材料的固定结合部模型［J］.振动工程学报，2013，26(4): 561-573.
TIAN Hongliang, LIU Furong, FANG Zifan, et al.Immovable joint surface’s model using isotropic virtual material［J］.Journal of Vibration Engineering, 2013,26(4): 561-573.

［9］田红亮，赵美云，郑金华，等.新的柔性结合部法向接触刚度和接触阻尼方程［J］.西安交通大学学报，2015,49(1): 118-126.
TIAN Hongliang, ZHAO Meiyun, ZHENG Jinhua, et al.New equations of normal contact stiffness and damping for flexible joint interface［J］．Journal of Xi’an Jiaotong University, 2015,49(1): 118-126.

［10］王东，徐超.一种考虑粗糙结合面切向黏滑摩擦模型［J］.机械工程学报，2014,50(13): 129-134.
WANG Dong, XU Chao.A tangential stick-slip friction model for rough interface［J］.Journal of Mechanical Engineering, 2014,50(13): 129-134.

［11］李玲，蔡力钢，蔡安江，等.固定结合面切向接触刚度通用性建模方法［J］.计算机集成制造系统, 2015,21(8): 2018-2115.
LI Ling, CAI Ligang, CAI Anjiang, et al.Universal modeling method for tangential stiffness of fixed joint interface［J］.Computer Integrated Manufacturing Systems, 2015,21(8): 2018-2115.

［12］李玲，蔡安江，阮晓光，等.栓接结合部刚度建模与特性分析［J］.振动工程学报, 2017,30(1): 1-8.
LI Ling, CAI Anjiang, RUAN Xiaoguang, et al.Stiffness modeling and characteristics analysis of bolted joint［J］.Journal of Vibration Engineering, 2017,30(1): 1-8.

［13］蔡力钢，郝宇，郭铁能，等.螺栓结合面法向静态刚度特性提取方法研究［J］.振动与冲击，2014,33(16): 18-23.
CAI Ligang, HAO Yu, GUO Tieneng, et al.Method of extracting normal static stiffness of bolted joint interfaces［J］.Journal of Vibration and Shock, 2014,33(16): 18-23.

［14］SCHMIDT A, BOGRAD S, GAUL L.Measurement of join patch properties and their integration into finite-element calculations of assembled structures［J］.Shock and Vibration, 2012,19(5): 1125-1133.

［15］董冠华，殷勤，刘蕴，等.基于模态分析理论的结合部动刚度辨识［J］.振动与冲击，2017,36(20): 125-131.
DONG Guanhua, YIN Qin, LIU Yun, et al.A study on the identification of joints dynamic stiffness based on modal analysis ［J］.Journal of Vibration and Shock, 2017,36(20): 125-131.

［16］姜东，吴邵庆，史勤丰，等.基于薄层单元的螺栓连接结构接触面不确定性参数识别［J］.工程力学，2015,32(4): 220-227.
JIANG Dong, WU Shaoqing, SHI Qinfeng, et al.Contact interface parameter identification of bolted joint structure with uncertainty using thin layer element method［J］.Engineering Mechanics, 2015,32(4): 220-227.

［17］CHEN X Q, SHEN Z P, LIU X E.A PCA-based approach for structural dynamics model updating with interval uncertainty［J］.Acta Mechanica Solida Sinica, 2019,32(1): 105-119.