Structural Engineering and Mechanics

  • 제66권2호
  • /
  • Pages.273-283
  • /
  • 2018
  • /
  • 1225-4568(pISSN)
  • /
  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Multi-dimensional wind vibration coefficients under suction for ultra-large cooling towers considering ventilation rates of louvers

  • Ke, S.T. (Department of Civil Engineering, Nanjing University of Aeronautics and Astronautics) ;
  • Du, L.Y. (Department of Civil Engineering, Nanjing University of Aeronautics and Astronautics) ;
  • Ge, Y.J. (State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University) ;
  • Tamura, Y. (Center of Wind Engineering Research, Tokyo Polytechnic University)
  • 투고 : 2017.04.19
  • 심사 : 2018.02.07
  • 발행 : 2018.04.25
⟨ 이전 논문 다음 논문 ⟩

초록

Currently, the dynamic amplification effect of suction is described using the wind vibration coefficient (WVC) of external loads. In other words, it is proposed that the fluctuating characteristics of suction are equivalent to external loads. This is, however, not generally valid. Meanwhile, the effects of the ventilation rate of louver on suction and its WV are considered. To systematically analyze the effects of the ventilation rate of louver on the multi-dimensional WVC of ultra-large cooling towers under suctions, the 210 m ultra-large cooling tower under construction was studied. First, simultaneous rigid pressure measurement wind tunnel tests were executed to obtain the time history of fluctuating wind loads on the external surface and the internal surface of the cooling tower at different ventilation rates (0%, 15%, 30%, and 100%). Based on that, the average values and distributions of fluctuating wind pressures on external and internal surfaces were obtained and compared with each other; a tower/pillar/circular foundation integrated simulation model was developed using the finite element method and complete transient time domain dynamics of external loads and four different suctions of this cooling tower were calculated. Moreover, 1D, 2D, and 3D distributions of WVCs under external loads and suctions at different ventilation rates were obtained and compared with each other. The WVCs of the cooling tower corresponding to four typical response targets (i.e., radial displacement, meridional force, Von Mises stress, and circumferential bending moment) were discussed. Value determination and 2D evaluation of the WVCs of external loads and suctions of this large cooling tower at different ventilation rates were proposed. This study provides references to precise prediction and value determination of WVC of ultra-large cooling towers.

키워드

과제정보

연구 과제 주관 기관 : National Natural Science Foundation, Jiangsu Province Natural Science Foundation, Postdoctoral Science Foundation

참고문헌

  1. Alam, M.N., Upadhyay, N.K. and Anas, M. (2012), "Efficient finite element model for dynamic analysis of laminated composite beam", Struct. Eng. Mech., 42(4), 471-488. https://doi.org/10.12989/sem.2012.42.4.471
  2. Asadzadeh, E., Alam, M. and Asadzadeh, S. (2014), "Dynamic response of layered hyperbolic cooling tower considering the effects of support inclinations", Struct. Eng. Mech., 50(6), 797-816. https://doi.org/10.12989/sem.2014.50.6.797
  3. Babu, G.R., Rajan, S.S., Harikrishna, P., Lakshmanan, N. and Arunachalam, S. (2013), "Experimental determination of windinduced response on a model of natural draught cooling tower", Exper. Tech., 37(37), 35-46. https://doi.org/10.1111/j.1747-1567.2011.00715.x
  4. Berrabah, H.M., Tounsi, A.L., Semmah, A. and Bedia, E.A.A. (2013), "Comparison of various refined nonlocal beam theories for bending, vibration and buckling analysis of nanobeams", Struct. Eng. Mech., 48(3), 351-365. https://doi.org/10.12989/sem.2013.48.3.351
  5. BS 4485 (1996), Code of Practice for Structural Design and Construction-Water Cooling Towers.
  6. Cheng, X.X., Zhao, L. and Ge, Y.J. (2016), "Field measurements on flow past a circular cylinder in transcritical reynolds number regime", Acta Phys. Sin., 65(21).
  7. DL/T 5339-2006 (2006), Code for Hydraulic Design of Fossil Fuel Power Plants, The Ministry of Construction of China, Beijing, China.
  8. GB/T50102-2014 (2014), Industrial Circulating Water Cooling Design Specification, The Ministry of Construction of China, Beijing, China.
  9. JGJ3-2010 (2010), Technical Specification for Concrete Structures of Tall Building, The Ministry of Construction of China, Beijing, China.
  10. Kang, J.H. (2015), "Vibration analysis of free-fixed hyperbolic cooling tower shells", Struct. Eng. Mech., 55(4), 785-799. https://doi.org/10.12989/sem.2015.55.4.785
  11. Karakas, A.I., Ozgan, K. and Daloglu, A.T. (2016), "A parametric study for free vibration analysis of hyperbolic cooling towers on elastic foundation using consistent fem-vlasov model", Arch. Appl. Mech., 86(5), 869-882. https://doi.org/10.1007/s00419-015-1067-7
  12. Ke, S.T. and Ge, Y.J. (2014), "The influence of self-excited forces on wind loads and wind effects for super-large cooling towers", J. Wind Eng. Industr. Aerodyn., 132, 125-135. https://doi.org/10.1016/j.jweia.2014.07.003
  13. Ke, S.T., Ge, Y.J. and Zhao, L. (2012), "A new methodology for analysis of equivalent static wind loads on super-large cooling towers", J. Wind Eng. Industr. Aerodyn., 111(3), 30-39. https://doi.org/10.1016/j.jweia.2012.08.001
  14. Ke, S.T., Ge, Y.J. and Zhao, L. (2015), "Wind-induced vibration characteristics and parametric analysis of large hyperbolic cooling towers with different feature sizes", Struct. Eng. Mech., 54(5), 891-908. https://doi.org/10.12989/sem.2015.54.5.891
  15. Ke, S.T., Ge, Y.J., Zhao, L. and Tamura, Y. (2015), "Stability and reinforcement analysis of super large exhaust cooling towers based on a wind tunnel test", J. Struct. Eng., 141(12), 04015066. https://doi.org/10.1061/(ASCE)ST.1943-541X.0001309
  16. Ke, S.T., Liang, J., Zhao, L. and Ge, Y.J. (2015), "Influence of ventilation rate on the aerodynamic interference for two IDCTs by CFD", Wind Struct., 20(3), 449-468. https://doi.org/10.12989/was.2015.20.3.449
  17. Khan, A.A., Alam, M.N., Rahman, N. and Wajid, M. (2016), "Finite element modelling for static and free vibration response of functionally graded beam", Lat. Am. J. Sol. Struct., 13(4), 690-714. https://doi.org/10.1590/1679-78252159
  18. Li, G. and Cao, W.B. (2013), "Structural analysis and optimization of large cooling tower subjected to wind loads based on the iteration of pressure", Struct. Eng. Mech., 46(5), 735-753. https://doi.org/10.12989/sem.2013.46.5.735
  19. Li, H.N., Tang, S.Y. and Yi, T.H. (2013), "Wind-rain-induced vibration test and analytical method of high-voltage transmission tower", Struct. Eng. Mech., 48(4), 144-150.
  20. Li, X. and Li, X.W. (2011), "Analysis of wind-induced dynamic response of super large cooling tower", Build. Struct., S1, 1414-1417.
  21. Qu, W.L., Chen, Z.H., and Xu, Y.L. (2001), "Dynamic analysis of wind-excited truss tower with friction dampers", Comput. Struct., 79(32), 2817-2831. https://doi.org/10.1016/S0045-7949(01)00151-1
  22. Rahman, N. and Alam, M.N. (2015), "Structural control of piezoelectric laminated beams under thermal load", J. Therm. Stress., 38(1), 69-95. https://doi.org/10.1080/01495739.2014.976138
  23. Sun, T.F. and Zhou, L.M. (1983), "Without ribs the elliptic wind pressure distribution of the cooling tower full size measurement and wind tunnel study", J. Air Dyn., 12(4), 12-17.
  24. VGB-R 610Ue (2010), Structural Design of Cooling Tower-Technical Guideline for the Structural Design, Computation and Execution of Cooling Towers.
  25. Yeter, B., Garbatov, Y. and Soares, C.G. (2015), "Fatigue damage assessment of fixed offshore wind turbine tripod support structures", Eng. Struct., 101, 518-528. https://doi.org/10.1016/j.engstruct.2015.07.038
  26. Zhao, L., Ge, Y.J. and Cao, F.C. (2008), "Equivalent beam-net design theory of aero-elastic model about hyperbolic thin-shell cooling towers and its experimental investigation", J. Vibr. Eng., 21(1), 31-37.
  27. Zhao, L., Ge, Y.J. and Kareem, A. (2017), "Fluctuating wind pressure distribution around full-scale cooling towers", J. Wind Eng. Industr. Aerodyn., 165, 34-45. https://doi.org/10.1016/j.jweia.2017.02.016
  28. Zhou, X., Niu, H.W., Chen, Z.Q. and Wang, Z.Y. (2014), "Study on interference effect of cooling towers under condition of tower-tower and hilly surroundings", J. Build. Struct., 35(12), 140-148.
  29. Zhu, J.N., Xu, Y.Z. and Li, X. (2013), "Stochastic wind-induced dynamic response analysis of large hyperbolic cooling tower", J. Xi'an Univ. Architect. Technol., 45(6), 808-812.

피인용 문헌

  1. Studies on the influence factors of wind dynamic responses on hyperbolic cooling tower shells vol.72, pp.5, 2019, https://doi.org/10.12989/sem.2019.72.5.541