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Study on post-flutter state of streamlined steel box girder based on 2 DOF coupling flutter theory

  • Guo, Junfeng (School of Civil Engineering, Southwest Jiaotong University) ;
  • Zheng, Shixiong (School of Civil Engineering, Southwest Jiaotong University) ;
  • Zhu, Jinbo (School of Civil Engineering, Southwest Jiaotong University) ;
  • Tang, Yu (School of Civil Engineering and Architecture, Southwest Petroleum University) ;
  • Hong, Chengjing (School of Civil Engineering, Southwest Jiaotong University)
  • Received : 2017.05.25
  • Accepted : 2017.08.12
  • Published : 2017.10.25

Abstract

The post-flutter state of streamlined steel box girder is studied in this paper. Firstly, the nonlinear aerodynamic self-excited forces of the bridge deck cross section were investigated by CFD dynamic mesh technique and then the nonlinear flutter derivatives were identified on this basis. Secondly, based on the 2-degree-of-freedom (DOF) coupling flutter theory, the torsional amplitude and the nonlinear flutter derivatives were introduced into the traditional direct flutter calculation method, and the original program was improved to the "post-flutter state analysis program" so that it can predict not only the critical flutter velocity but also the movement of the girder in the post-flutter state. Finally, wind tunnel tests were set to verify the method proposed in this paper. The results show that the effect of vertical amplitude on the nonlinear flutter derivatives is negligible, but the torsional amplitude is not; with the increase of wind speed, the post-flutter state of streamlined steel box girder includes four stages, namely, "little amplitude zone", "step amplitude zone", "linearly growing amplitude zone" and "divergence zone"; damping ratio has limited effect on the critical flutter velocity and the steady state response in the post-flutter state; after flutter occurs, the vibration form is a single frequency vibration coupled with torsional and vertical DOF.

Keywords

Acknowledgement

Supported by : Natural Science Foundation of China

References

  1. Amandolese, X., Michelin, S. and Choquel, M. (2013), "Low speed flutter and limit cycle oscillations of a two-degree-of-freedom flat plate in a wind tunnel", J. Fluid. Struct., 43(6), 244-255. https://doi.org/10.1016/j.jfluidstructs.2013.09.002
  2. Chen, A. and Ma, R. (2011), "Self-excited force model and parameter identification for soft flutter", Proceedings of the International Conference of Wind Engineering. Amsterdam, Netherlands, July.
  3. Chen, Z.Q., Yu, X.D., Yang, G. and Spencer, Jr. B.F. (2005), "Wind-induced self-excited loads on bridges", J. Struct. Eng., 131(12), 1783-1793. https://doi.org/10.1061/(ASCE)0733-9445(2005)131:12(1783)
  4. Cunningham, A.M. (2003), "Buzz, buffet and LCO on military aircraft-the aeroelastician's nightmares", Proceedings of the International Forum on Aeroelasticity and Structural Dynamics, Amsterdam, Netherlands, June.
  5. Daito, Y., Matsumoto, M. and Araki, K. (2002), "Torsional flutter mechanism of two-edge girders for long-span cable-stayed bridge", J. Wind Eng. Ind. Aerod., 90(12), 2127-2141. https://doi.org/10.1016/S0167-6105(02)00329-X
  6. Diana, G., Resta, F. and Rocchi, D. (2008), "A new numerical approach to reproduce bridge aerodynamic non-linearities in time domain", J. Wind Eng. Ind. Aerod., 96(10), 1871-1884. https://doi.org/10.1016/j.jweia.2008.02.052
  7. Diana, G., Rocchi, D., Argentini, T. and Muggiasca, S. (2010), "Aerodynamic instability of a bridge deck section model: Linear and nonlinear approach to force modeling", J. Wind Eng. Ind. Aerod., 98(6), 363-374. https://doi.org/10.1016/j.jweia.2010.01.003
  8. Falco, M., Curami, A. and Zasso, A. (1992), "Nonlinear effects in sectional model aeroelastic parameters identification", J. Wind Eng. Ind. Aerod., 42(1-3), 1321-1332. https://doi.org/10.1016/0167-6105(92)90140-6
  9. Han, Y., Liu, S. and Cai, C.S. (2015), "Flutter stability of a long-span suspension bridge during erection", Wind Struct., 21(1), 41-61. https://doi.org/10.12989/was.2015.21.1.041
  10. Larose, G.L., Davenport, A.G. and King, J.P.C. (1993), "On the unsteady aerodynamic forces on a bridge deck in turbulent boundary layer flow", Proceedings of the 7th U.S. National Conference on Wind Engineering, pages 373-382, UCLA, Los Angeles, CA. G.C. Hart.
  11. Majid, D.L.A.H.A. and Basri, S. (2008), "LCO flutter of cantilevered woven glass/epoxy laminate in subsonic flow", Acta Mechanica Sinica, 24(1), 107-110. https://doi.org/10.1007/s10409-007-0117-y
  12. Naprstek, J. and Pospisil, S. (2011), "Post-critical behavior of a simple non-linear system in a cross-wind", Eng. Mech., 18(3-4), 193-201.
  13. Naprstek, J., Pospisil, S. and Hracov, S. (2007), "Analytical and experimental modelling of non-linear aeroelastic effects on prismatic bodies", J. Wind Eng. Ind. Aerod., 95(9), 1315-1328. https://doi.org/10.1016/j.jweia.2007.02.022
  14. Naprstek, J., Pospisil, S., Hoffer, R. and Sahlmen, J. (2008), "Self-excited nonlinear response of a bridge-type cross section in post-critical state", Proceedings of the 6th International Colloquium on Bluff Body Aerodynamics and Applications, Milano, Italy, July.
  15. Noda, M., Utsunomiya, H., Nagao, F., Kanda, M. and Shiraishi, N. (2003), "Effects of oscillation amplitude on aerodynamic derivatives", J. Wind Eng. Ind. Aerod., 91(1), 101-111. https://doi.org/10.1016/S0167-6105(02)00338-0
  16. Piccardo, G. (1993), "A methodology for the study of coupled aeroelastic phenomena", J. Wind Eng. Ind. Aerod., 48(2-3), 241-252. https://doi.org/10.1016/0167-6105(93)90139-F
  17. Scanlan, R.H. (1997), "Amplitude and turbulence effects on bridge flutter derivatives", J. Struct. Eng., 123(2), 232-236. https://doi.org/10.1061/(ASCE)0733-9445(1997)123:2(232)
  18. Scanlan, R.H. and Tomko, J.J. (1971), "Air foil and bridge deck flutter derivatives", J. Eng. Mech. - ASCE, 97(6), 1717-1737.
  19. Tang, L., Bartels, R.E., Chen, P.C. and Liu, D.D. (2003), "Numerical investigation of transonic limit cycle oscillations of a two-dimensional supercritical wing", J. Fluid. Struct., 17(1), 29-41. https://doi.org/10.1016/S0889-9746(02)00114-7
  20. Tang, Y. (2015), "Nonlinear self-excited forces of streamlined box deck and nonlinear flutter response", Ph.D. Dissertation, Southwest Jiaotong University, Chengdu, China.
  21. Wang, B. and Zha, G.C. (2011), "Detached-eddy simulation of transonic limit cycle oscillations using high order schemes", Comput. Fluid., 52, 58-68. https://doi.org/10.1016/j.compfluid.2011.08.018
  22. Wu, T. and Kareem, A. (2013a), "A nonlinear convolution scheme to simulate bridge aerodynamics", Comput. Struct., 128, 259-271. https://doi.org/10.1016/j.compstruc.2013.06.004
  23. Wu, T. and Kareem, A. (2013b). "Aerodynamics and Aeroelasticity of Cable-Supported Bridges: Identification of Nonlinear Features", J. Eng. Mech. - ASCE, 139(12), 1886-1893. https://doi.org/10.1061/(ASCE)EM.1943-7889.0000615
  24. Wu, T., Kareem, A. and Ge, Y. (2013), "Linear and nonlinear aeroelastic analysis frameworks for cable-supported bridges", Nonlinear Dynam., 74(3), 487-516. https://doi.org/10.1007/s11071-013-0984-7
  25. Xu, X. and Cao, Z.Y. (2001), "Linear and nonlinear aerodynamic theory of interaction between flexible long structure and wind", Appl. Math. Mech., 22(12), 1446-1457. https://doi.org/10.1007/BF02435549
  26. Ying, X.Y., Xu, F.Y. and Zhang, Z. (2016), "Study on numerical simulation and mechanism of soft flutter of a bridge deck". Proceedings of the ACEM. Jeju, Koraea, September.
  27. Zhang, M.J., Xu, F.Y. and Ying, X.Y. (2016), "Experimental investigations on the soft flutter of a bridge deck", Proceedings of the ACEM. Jeju, Koraea, September.
  28. Zhang, W.M., Ge, Y.J. and Levitan, M.L. (2011), "Aerodynamic flutter analysis of a new suspension bridge with double main spans", Wind Struct., 14(3), 187-208. https://doi.org/10.12989/was.2011.14.3.187
  29. Zhu, L.D. and Gao, G.Z. (2015), "Influential factors of soft flutter phenomenon for typical bridge deck sections", J. Tongji University (Natural science), 43(9), 1289-1294. In Chinese.

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