基于频响函数法的固定结合部参数辨识研究

PDF(849 KB)

振动与冲击 ›› 2018, Vol. 37 ›› Issue (11) : 18-26.

论文

基于频响函数法的固定结合部参数辨识研究

田丰庆，朱坚民，李孝茹，李尧

作者信息 +

Parametric identification for a fixed joint based on FRF method

TIAN Fengqing,ZHU Jianmin,LI Xiaoru, LI Yao

Author information +

文章历史 +

摘要

针对频响函数法在辨识固定结合部参数时由于实验噪声引起的不适定问题，提出对结合部模型中各参数单独分析、单独辨识的方法。利用频响函数法建立固定结合部模型，辨识模型参数时先通过遗传算法寻优得到的结合部参数作为初值，仅改变其中某一参数的大小对整体结构进行模态分析，确定该参数在每一阶模态处的灵敏度。在最灵敏的模态处辨识该参数，以此类推辨识出所有结合部参数。仿真与实验结果表明，采用该方法辨识的结合部参数所预测的整体结构的频响函数曲线与实验测试的频响函数曲线的一致性较好，结合部参数辨识结果具有较高的精度。

Abstract

A new method to analyze and identify each parameter of a fixed joint separately was proposed aiming at ill-posed problems caused by test noise during parametric identification of a fixed joint using the frequency response function (FRF) method. A fixed joint model was established with the FRF method. The optimal values of the fixed joint’s parameters calculated with genetic algorithm were taken as the initial ones during parametric identification of the model built. The modal analysis was conducted for the corresponding whole structure when changing one of all parameters of the fixed joint to determine the sensitivity of the changed parameter to each vibration mode of the whole structure and identify this parameter at its most sensitive vibration mode until all parameters of the fixed joint were identified. Simulation and test results indicated that the FRF curve of the corresponding whole structure predicted using the joint’s parameters identified with the proposed method agrees well with that obtained with tests, so the identified joint parameters have a higher accuracy.

导出引用

田丰庆，朱坚民，李孝茹，李尧. 基于频响函数法的固定结合部参数辨识研究[J]. 振动与冲击, 2018, 37(11): 18-26

TIAN Fengqing,ZHU Jianmin,LI Xiaoru, LI Yao. Parametric identification for a fixed joint based on FRF method[J]. Journal of Vibration and Shock, 2018, 37(11): 18-26

参考文献

[1] 蔡力钢,王锋,李玲等.栓接结合部动态特性研究进展[J].机械工程学报,2013,49(9):158-168.
CAI Ligang, WANG Feng, LI Ling, et al. Review on dynamic properties of bolted joints [J]. Journal of Mechanical Engineering, 2013, 49(9):158-168.
[2] 李金峰,王立平.改进的受力状态映射法在结合部动力学参数辨识中应用[J].振动与冲击,2016,35(6):488-496.
LI Jin-feng,WANG Li-ping. Application of an improved force-state mapping method in dynamic parameter identification of joints [J]. Journal of Vibration and Shock, 2016, 35(6):13-19.
[3] OKUBO N, MIYAZAKI M. Development of uncoupling technique and its application [J]. Proceedings of International Modal Analysis Conference, 1984 Florida, U.S.A.:1194-1200.
[4] TSAI J S, CHOU Y F. The identification of dynamic characteristics of a single bolt joint [J]. Journal of Sound and Vibration, 1988, 125:487-502.
[5] WANG J H, LIOU C M. Experimental substructure synthesis with special consideration of joint effect [J]. International Journal of Analytical and Experimental Modal Analysis, 1989, 5(1):1-12.
[6] HWANG H Y. Identification techniques of structure connection parameters using frequency response functions [J]. Journal of Sound and Vibration, 1998, 212(3):469-479.
[7] Čelič D, Boltežar M. Identification of the dynamic properties of joints using frequency response functions [J]. Journal of Sound and Vibration, 2008, 317:158-174.
[8] Čelič D, Boltežar M. The influence of the coordinate reduction on the identification of the joint dynamic properties [J]. Mechanical Systems and Signal Processing. 2009, 23: 1260-1271.
[9] REN Y, BEARDS C. F. Identification of joint properties of a structure using FRF data [J]. Journal of Sound and Vibration, 1995, 186(4):567-587.
[10] YANG T, FAN S H, LIN C. S. Joint stiffness identification using FRF measurements [J]. Computers & Structures, 2003, 81: 2549-2556.
[11] MEHRPOUYA M, SANATI M, PARK S S. Identification of joint dynamics in 3D structures through the inverse receptance coupling method [J]. International Journal of Mechanical Sciences, 2016, 105: 135-145.
[12] 李玲,蔡安江,蔡力钢等.栓接结合部动态特性辨识方法[J].机械工程学报,2013,49(7):168-175.
LI Ling, CAI Anjiang, CAI Ligang, et al. Identification method for dynamic properties of bolted joints [J]. Journal of Mechanical Engineering, 2013, 49(7):168-175.
[13] 李玲,蔡力钢,郭铁能等.机械结合部动态刚度辨识与实验研究[J].振动工程学报,2012,25(5):488-496.
LI Ling, CAI Ligang, GUO Tieneng, et al. Identification and experimental research on dynamic stiffness of mechanical joints [J]. Journal of Vibration Engineering, 2012, 25(5):488-496.
[14] 郭铁能,李玲,蔡力钢等.基于频响函数辨识机械结合部动态参数的研究[J].振动与冲击,2011,30(5):69-72．
GUO Tieneng, LI Ling, CAI Ligang, et a1. Identifying mechanical joint dynamic parameters based on measured frequency response functions [J]. Journal of Vibration and Shock, 201l, 30(5):69-72．
[15] 李玲,蔡安江,蔡力钢等.栓接结合部动态特性参数辨识新方法[J].振动与冲击,2014,33(14):15-32.
LI Ling, CAI Anjiang, CAI Ligang, et al. New method to identify dynamic characteristics of bolted joints [J]. Journal of Vibration and Shock, 2014, 33(14):15-32.
[16] 董冠华,殷勤,殷国富等.机床结合部动力学建模与辨识方法的研究[J].机械工程学报,2016,52(5):162-168.
DONG Guanhua, YIN Qin, YIN Guofu, et al. Research on Dynamics Modeling and Identification of Machine Tool Joints [J]. Journal of Mechanical Engineering.2016, 52(5): 162-168.
[17] KLERK D, RIXEN D, VOORMEEREN S, et al. Solving the RDOF problem in experimental dynamic substructuring [J]. Proceedings of the 26th international Modal Analysis conference, Orlando, USA, 2008.
[18] DUARTE M. L. M,EWINS D J. Rotational degrees of freedom for structural coupling analysis via finite difference technique with residual compensation [J]. Mechanical Systems and Signal Processing, 2000, 14(2):205-227.