Prospects for the Suppression of Aeroedynamic Vibrations of a Long-Span Bridge Using Boundary-Layer Control

Abstract

Aerodynamic vibrations inherently occur on a long-span-length bridge. The vibrations are roughly classified into vortex-excited vibration and self-excited vibration both are induced by separation flow from the leading edge of the structure. As aerodynamic vibrations frequently cause fatal damage to the structure, the suppression method of vibration has been studied for a long time. Two methods have been proposed for suppression of the vibrations: a structural method and an aerodynamic method. The former is a tuned mass damper or a tuned liquid damper, and the latter is a separation flow control using a certain device of flap or faring. As the aerodynamic method is one of the solutions to eliminate the cause of aeroelastic vibration, the aerodynamic method is more useful than the structural method from the point of view of the suppression of vibrations. Sometimes, however, it may be more costly. This paper deals with the prospects for active control of separation flow to suppress vibrations for the girders and towers of a long-span-length bridge.

Keywords

Boundary-layer control suppression of wind-induced vibration super-long suspension bridge

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References

Kubo, Y. and Yasuda, H. , 1991, “Surface pressure characteristics of a square prism under aerodynamic response control by boundary layer acceleration,” in Proceedings of the Institution of Mechanical Engineers on Flow-Induced Vibrations, UK, pp. 411–416 .

Kubo, Y. , Modi, V. J. , Yasuda, H. , and Kato, K. , 1992, “On the suppression of aerodynamic instabilities through the moving surface boundary-layer control,” Journal of Wind Engineering and Industrial Aerodynamics 41–44, 205–206 .

Kubo, Y. , Yasuda, H. , Kotsubo, C. , and Hirata, K. , 1993a, “Active control of super-tall structure vibrations under wind action by a boundary layer control,” Journal of Wind Engineering and Industrial Aerodynamics 50, 361–372 .

Kubo, Y. , Yasuda, H. , and Kotsubo, C. , 1993b, “Active control for aerodynamic vibrations of tall structures through boundary-layer control method,” in Proceedings of the 2nd Conference on Recent Advances in Active Control of Sound and Vibrations, pp. 589–599 .

Kubo, Y. , Hayashida, K. , Kotsubo, C. , and Kato, K. , 1995, “On the suppression of aerodynamic vibrations of a square prism in high angle of attack by boundary-layer control method,” in Proceedings of the 1st World Conference on Structural Control, CA, USA, pp. 298–309 .

Kubo, Y. , Modi, V. J. , Kotsubo, C. , Hayashida, K. , and Kato, K. , 1996, “Suppression of wind-induced vibration of tall structures through moving surface boundary-layer control,” Journal of Wind Engineering and Industrial Aerodynamics 61, 181–194 .

Kubo, Y. , Yukoku, E. , Modi, V. J. , Ymaguchi, E. , and Kato, K. , 1997, “Control of flow separation from leading edge of a shallow rectangular cylinder through momentum injection,” in Proceedings of the 4th Asia–Paci c Symposium on Wind Engineering, pp. 37–40 .

Kubo, Y. , Hayashida, K. , Modi, V. J. , Kawamura, S. , Yamaguchi, E. , and Kato, K. , 1998, “Parametric study on boundary-layer control for suppression of aeroelastic vibration of square prism with rotating cylinder,” in Proceedings of the 2nd World Conference on Structural Control, eds. T, Kabori , Y. Inove , K. Seto , H. Iemura and A. Nishitani , Wiley, NY, pp. 1815–1822 .

Kubo, Y. , Yukoku, E. , Modi, V. J. , Yamaguchi, E. , Kato, K. , and Kawamura, S. , 1999, “Control of flow separation from leading edge of a shallow rectangular cylinder through momentum injection,” Journal of Wind Engineering and Industrial Aerodynamics 83, 503–514 .

10.

Modi, V. J. , 1990, “Moving surface boundary-layer control with varied applications,” in Proceedings of the 16th National Conference on Fluid Mechanics and Fluid Power, invited address, pp. 584–599 .

11.

Modi, V. J. , Swinton, P. G. , McMillan, K. , Lake, P. , Mullins, D. , and Akutsu, T. , 1979, “Moving surface boundarylayer control for aircraft operation at high incidence,” in Proceedings of Candian Congress on Applied Mechanics, Paper No. 80-1621, pp. 515–522 . See also Modi et al., 1981, Journal of Aircraft18(11), 963–969.

12.

Modi, V. J. , Swinton, P. G. , McMillan, K. , Lake, P. , Mullins, D. , and Akutsu, T. , 1981, “On the boundary-layer control using the concept of moving surface,” in Proceedings of CANCAM, Vol. 2, pp. 621–622 .

13.

Modi, V. J. , Fernando, M. S. U. K. , and Yokomizo, T. , 1989, “Moving surface boundary-layer control as applied to two-and three-dimensional bodies,” in Proceedings of the 8th Colloquium on Industrial Aerodynamics – Industrial Flows, Achen, Germany, pp. 73–84 .

14.

Modi, V. J. , Ying, B. , and Yokomizo, T. , 1990a, “Boundary-layer control of bluff bodies through momentum injection,” Journal of Commercial Vehicles, Section 2 99, 778–794 .

15.

Modi, V. J. , Fernando, M. S. U. K. , and Yokomizo, T. , 1990b, “Drag reduction of bluff bodies through moving surface boundary-layer control,” in Proceedings of the 28th Aerospace Science Meeting, Paper No. AIAA-90-0298.

16.

Modi, V. J. , Shih, E. , and Yokomizo, T. , 1990c, “On the drag reduction of bluff bodies through momentum injection,” in Proceedings of the AIAA 8th Applied Aerodynamics Conference, pp. 866–874 .

17.

Modi, V. J. , Fernando, M. S. U. K. , and Yokomizo, T. , 1991, “Moving surface boundary control: studies with bluff bodies and application,” AIAA Journal 29(9), 1400–1406 .

18.

Schlichting, H. , 1979, Boundary Layer Theory, McGraw-Hill, NY .