Browse > Article
http://dx.doi.org/10.5050/KSNVN.2004.14.6.536

Identification of Dynamic Joint Characteristics Using a Multi-domain FRF-based Substructuring Method  

황우석 (대구대학교 자동차/산업/기계공학부)
이두호 (동의대학교 기계공학과)
Publication Information
Transactions of the Korean Society for Noise and Vibration Engineering / v.14, no.6, 2004 , pp. 536-545 More about this Journal
Abstract
A method of identifying structural parameters such as stiffness and damping coefficients at interfacial points of vibro-acoustic systems is suggested using an optimization technique. To identify the parameters using a numerical optimization algorithm, cost functions are defined. The cost function should be zero at the correct parameter values. To minimize the cost functions using an optimization technique, a design sensitivity analysis procedure is developed in the framework of the multi-domain FRF-based substructuring method. As a numerical example, a ladder-like structure problem is introduced. With known parameter values and different initial guesses of the parameters, convergence characteristics to the exact value are compared for the three cost functions. Investigating the contours of the cost functions, we find the first cost function has the largest convergent region to the correct value. As another practical problem, the stiffnesses of engine mounts and bushings in a passenger car are identified. The numerical examples show that the proposed method is efficient and accurate for realistic problems.
Keywords
Identification of Joint Parameter; FRF-based Substructuring Method; Optimization Technique;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Hong, S. W. and Lee, C. W., 1991, "Identification of Linearized Joint Structural Parameters by Combined use of Measured and Computed Frequency Responses," Mechanical Systems and Signal Processing, Vol. 5, pp. 267-277.   DOI   ScienceOn
2 Lee, D. H. and Hwang, W. S., 2003, "Parametric Optimization of Complex Systems Using a Multi-Domain FRF-based Substructuring Method," Vol. 81, No. 22-23, pp. 2249-2257, Computers & Structures.   DOI   ScienceOn
3 Tsai, J. S. and Chou, Y. F., 1988, "The Identification of Dynamic Characteristics of a Single Bolt Joint," Journal of Sound and Vibration, Vol. 125, pp. 487-502.   DOI   ScienceOn
4 Wang, J. H. and Liou, C. M., 1991, "Experimental Identification of Mechanical Joint Para- meters," Journal of Vibration and Acoustics, Vol. 113, pp. 28-36.   DOI
5 황우석, 이두호, 2000, "전달함수를 이용한 차실 소음의 부분구조 해석," 한국소음진동공학회논문집, 제 10 권, 제 3 호, pp. 480-485.   과학기술학회마을
6 Hwang, H. Y., 1995, "Identification of Connections of Structure Using Test Data of Frequency Response Functions," Transactions of KSASS, Vol. 23, pp. 81-88.
7 Kapania, R. K. and Park, S., 1997, "Parametric Identification of Nonlinear Structural Dynamic Systems Using Time Finite Element Method," AIAA Journal, Vol. 35, pp. 719-726.   DOI   ScienceOn
8 Ren, Y. and Beards, C. F., 1998, "Identification of Effective Linear Joints Using Coupling and Joint Identification Techniques," Journal of Vibration and Acoustics, Vol. 120, pp. 331-338.   DOI   ScienceOn
9 Yuan, J. X. and Wu, X. M., 1985, "Identification of the Joint Structural Parameters of Machine Tool by DDS and FEM," ASME Journal of Engineering for Industry, Vol. 107, pp. 64-69.   DOI
10 Kim, T. R., Ehmann, K. F. and Wu, S. M., 1991, "Identification of Joint Structural Parameters Between Substructures," Journal of Engineering for Industry, Vol. 113, pp. 419-424.
11 Nobari, A. S., Robb, D. A. and Ewins, D. J., 1995, "A New Approach to Modal-based Structural Dynamic Model Updating and Joint Identification," Mechanical Systems and Signal Processing, Vol. 9, pp. 85-100.   DOI   ScienceOn
12 Friswell, M. I. and Mottershead, J. E., 1995, Finite Element Model Updating in Structural Dynamics, Kluwer Academic Publishers.
13 Yang, K. T. and Park, Y. S., 1993, "Joint Structural Parameter Identification Using a Subset of Frequency Response Function Measurements," Mechanical Systems and Signal Processing, Vol. 7, pp. 509-530.   DOI   ScienceOn
14 Ren, Y. and Beards, C. F., 1995, "Identification of Joint Properties of a Structure Using FRF Data," Journal of Sound and Vibration, Vol. 186, pp. 567-587.   DOI   ScienceOn
15 Ratcliffe, M. J. and Lieven, N. A., 2000, "A Generic Element-based Method for Joint Identification," Mechanical Systems and Signal Processing, Vol. 14, pp. 3-28.   DOI   ScienceOn
16 Hemes, F. M. and Brown, G. W., 1998, "Improving Structural Dynamics Models by Correlating Simulated to Measured Frequency Response Function," AIAA-98-1789.