Model Updating of Semirigid Jointed Structure Using Generic Parameters
Publication: Journal of Engineering Mechanics
Volume 127, Issue 11
Abstract
Semirigid connections are usually found in large-scale engineering structures, and the knowledge of the dynamic characteristics of these connections is important to the accurate definition of the dynamic characteristics of the engineering structure. Different models have been presented to define the connection, but most of them are not suitable for model improvement from dynamic measurements of the structure. This paper presents a hybrid finite-element model that consists of a beam element with two semirigid connections at the ends for updating the finite-element model of the jointed structure. The parameter selection strategy of the generic element is adopted, and the stiffnesses of the joint in three dimensions are selected as generic parameters to be updated simultaneously with other structural parameters of the structure. The proposed method is applied to the model updating of a 3D steel truss in the laboratory. Results show that the method could improve significantly not only those vibration modes used in the updating but also the higher modes with a maximum error of 6%.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
Ahmadian, H., Gladwell, G. M. L., and Ismail, F. ( 1997). “Parameter selection strategies in finite element model updating.” J. Vibration and Acoustics, 119(1), 37–45.
2.
Beards, C. F. ( 1986). “Structural damping by slip in joints.” Shock and Vibration Dig., 17(11), 17–19.
3.
Berman, A. ( 1979). “Mass matrix correction using an incomplete set of measured models.” AIAA J., 17(10), 1147–1148.
4.
Berman, A., and Nagy, E. J. ( 1983). “Improvement of large analytical model using modal test data.” AIAA J., 21(8), 1168–1173.
5.
Baruch, M. ( 1984). “Methods of reference basis for identification of linear dynamic structures.” AIAA J., 22(4), 561–563.
6.
Caesar, B., and Peter, J. ( 1987). “Direct updating of dynamic mathematical models from modal testing data.” AIAA J., 25(11), 1494–1499.
7.
Chen, J. C., and Graba, J. A. ( 1980). “Analytical model improvement using modal testing results.” AIAA J., 12(2), 684–690.
8.
Chui, P. P. T., and Chan, S. L. ( 1997). “Vibration and deflection characteristics of semi-rigid jointed frames.” Engrg. Struct., 19(12), 1001–1010.
9.
Collins, J. D., Hart, G. C., Hasselman, T. K., and Kennedy, B. ( 1974). “Statistical identification of structures.” AIAA J., 12(1), 185–190.
10.
Friswell, M. I., and Mottershead, J. E. ( 1995). “Chapter 4.” Finite element model updating in structural dynamics, Kluwer Academic, London, 56–77.
11.
Gladwell, G. M. L., and Ahmadian, H. ( 1995). “Generic element matrices suitable for finite element model updating.” Mech. Sys. and Signal Processing, 9(6), 601–614.
12.
Hoff, C., and Natke, H. G. ( 1989). “Correction of a finite element model by input-output measurements with application to a radar tower.” Int. J. Analytical and Experimental Modal Anal., 4(1), 1–7.
13.
Jones, S. W., Kerby, P. A., and Nethercot, D. A. (1982). “Columns with semi-rigid joints.”J. Struct. Engrg. Div., 108(2), 361–372.
14.
Kabe, A. M. ( 1985). “Stiffness matrix adjustment using modal data.” AIAA J., 23(9), 1431–1436.
15.
Keye, S. ( 1997). “Prediction of modal and frequency response data from a validated finite element model.” Proc., 2nd Int. Conf. on Identification of Engrg. Sys., Cromwell Press, London, 122–134.
16.
Kidder, R. L. ( 1973). “Reduction of structural frequency equations.” AIAA J., 11(6), 892.
17.
Lewitt, C. W., Chesson, E., and Munse, W. H. ( 1969). “Restraint characteristics of flexible riveted and bolted beam-to-column connections.” Engrg. Bull. of Univ. of Illinois, 500.
18.
Lin, R. M., Lim, M. K., and Du, H. ( 1995). “Improved inverse eigensensitivity method for structural analytical model updating.” ASME J. Vibration and Acoustics, 117(1), 192–198.
19.
Lui, E. M., and Chen, W. F. ( 1987). “Effects of joint flexibility on the behavior of steel frames.” Comp. and Struct., 26(5), 719–732.
20.
Mottershead, J. E., and Friswell, M. I. ( 1993). “Model updating in structural dynamics: A survey.” J. Sound and Vibration, 167(2), 347–375.
21.
Nobari, A. S., Robb, D. A., and Ewins, D. J. ( 1993). “Model updating and joint identification methods: Applications, restrictions and overlap.” Int. J. Analytical and Experimental Modal Anal., 8(2), 93–105.
22.
Ren, Y. ( 1992). “The analysis and identification of friction joint parameters in the dynamic response of structures.” PhD thesis, Imperial College of Science Technology and Medicine, London University, London.
23.
Ross, R. G. ( 1971). “Synthesis of stiffness and mass matrices from experimental vibration modes.” Proc., Nat. Aeronautics and Space Engrg. and Manufacturing Meeting, Society of Automotive Engineers, Los Angeles, 2627–2635.
Information & Authors
Information
Published In
Journal of Engineering Mechanics
Volume 127 • Issue 11 • November 2001
Pages: 1174 - 1183
History
Received: Jan 31, 2000
Published online: Nov 1, 2001
Published in print: Nov 2001
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.