Abstract
In this paper, the possibility of the development of a new kind of low frequency shaker was discussed. In order to prove the possibility, a series of tests was performed using a direct-made experimental setup which contains a metal plate, springs and varying dampers. The frequency of the harmonic force variation and damper variation was set as f1 and f2. The plate center displacement achieves a peak point in the frequency component f1 and the rotational displacement achieves a peak point in the frequency components f1 + f2 and f1 − f2. In the experiment, the damper variation changed due to the damping constant value and current magnitude. Meanwhile, research on the natural frequency of the rotational displacement will continue. The inference of the reason for absence of frequency component related to rotational displacement natural frequency fnr is that the MR damper shows non-linear phenomenon in this experiment.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Bachmann, H., “Vibration Problems in Structures-Practical Guidelines,” Springer, 1995.
Stoessel, J. C., Ibanez, P., and Keowen, R. S., “High level vibration tests using a 2-kt eccentric mass vibrator,” Proceedings of the Fifth International Modal Analysis Conference, pp. 166–171, 1987.
Pietrzko, S. and Cantieni, R., “Modal testing of a steel/concrete composite bridge with a servo-hydraulic shaker,” Proc. the 14th International Modal Analysis Conference, pp. 91–98, 1996.
Mutch, G. F., Vigneron, F., and Vold, H., “The Dynamic Analysis of a Space Lattice Structure via the Use of Step Relaxation Testing,” Proc. the 2nd International Modal Analysis Conference, pp. 368–377, 1984.
Koss, L. L., “Force frequency shifting for structural excitation,” Journal of Sound and Vibration, Vol. 219, No. 2, pp. 223–237, 1999.
Koss, L. L., “Fluctuating moment shaker for frequency shifting and structural excitation,” Proc. the 3rd International Conference of Motion and Vibration Control, pp. 258–261, 1996.
Koss, L. L., He, Y. Y., Wang, X., “Bridge and beam response to harmonic spatial and time loads,” Proc. the 15th International Modal Analysis Conference, pp. 901–904, 1997.
Lee, G. M. and Park, O. C., “Motion of a System with Varying Stiffness/Damping Subject to Harmonic Force,” Transactions of the Korean Society for Noise and Vibration Engineering, Vol. 16, No. 9, pp. 958–963, 2006.
Lee, G. M. and Park, O. C., “Analytical Study on the Motion of a System with Varying Damping Subject,” Journal of Sound and Vibration, Vol. 312, No. 4–5, pp. 838–847, 2008.
Turnip, A., Park, S., and Hong, K. S., “Sensitivity control of a MRdamper semi-active suspension,” Int. J. Precis. Eng. Manuf., Vol. 11, No. 2, pp. 209–218, 2010.
Lee, H. G., Sung, K. G., Choi, S. B., Park, M. K., and Park, M. K., “Performance evaluation of a quarter-vehicle MR suspension system with different tire pressure,” Int. J. Precis. Eng. Manuf., Vol. 12, No. 2, pp. 203–210, 2011.
Rao, S. S. and Rao, S. S., “Mechanical Vibrations,” Pearson Prentice Hall, 2004.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Lee, Gm., Ju, Yh. & Park, Ms. Development of a low frequency shaker using MR dampers. Int. J. Precis. Eng. Manuf. 14, 1647–1650 (2013). https://doi.org/10.1007/s12541-013-0222-8
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s12541-013-0222-8