Structural Engineering and Mechanics

  • 제45권4호
  • /
  • Pages.543-568
  • /
  • 2013
  • /
  • 1225-4568(pISSN)
  • /
  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

AGV-induced floor micro-vibration assessment in LCD factories by using a regressional modified Kanai-Tajimi moving force model

  • Lee, C.L. (Department of Civil Engineering, The University of Hong Kong) ;
  • Su, R.K.L. (Department of Civil Engineering, The University of Hong Kong) ;
  • Wang, Y.P. (Department of Civil Engineering, National Chiao-Tung University)
  • 투고 : 2011.03.28
  • 심사 : 2013.01.21
  • 발행 : 2013.02.25
⟨ 이전 논문 다음 논문 ⟩

초록

This study explores the floor micro-vibrations induced by the automated guided vehicles (AGVs) in liquid-crystal-display (LCD) factories. The relationships between moving loads and both the vehicle weights and speeds were constructed by a modified Kanai-Tajimi (MKT) power spectral density (PSD) function whose best-fitting parameters were obtained through a regression analysis by using experimental acceleration responses of a small-scale three-span continuous beam model obtained in the laboratory. The AGV induced floor micro-vibrations under various AGV weights and speeds were then assessed by the proposed regressional MKT model. Simulation results indicate that the maximum floor micro-vibrations of the target LCD factory fall within the VC-B and VC-C levels when AGV moves at a lower speed of 1.0 m/s, while they may exceed the acceptable VC-B level when AGV moves at a higher speed of 1.5 m/s. The simulated floor micro-vibration levels are comparable to those of typical LCD factories induced by AGVs moving normally at a speed between 1.0 m/s and 2.0 m/s. Therefore, the numerical algorithm that integrates a simplified sub-structural multi-span continuous beam model and a proposed regressional MKT moving force model can provide a satisfactory prediction of AGV-induced floor micro-vibrations in LCD factories, if proper parameters of the MKT moving force model are adopted.

키워드

참고문헌

  1. Amick, H. and Bui, S.K. (1991), "A review of several methods for processing vibration data", Proceedings of International Society for Optical Engineering (SPIE) 1619, San Jose, November.
  2. Au, F.T.K., Jiang, R.J. and Cheung, Y.K. (2004), "Parameter identification of vehicles moving on continuous bridges", J. Sound Vib., 269(1-2), 91-111. https://doi.org/10.1016/S0022-460X(03)00005-1
  3. Borse, G.J. (1997), Numerical Methods with MATLAB: A Resource for Scientists and Engineers, PWS Publishing, Boston.
  4. Computers and Structures Inc. (2002), ETABS: Three Dimensional Static and Dynamic Analysis of Structures-A Physical Approach with Emphasis on Earthquake Engineering, Berkeley, California.
  5. Computers and Structures Inc. (2005), SAP2000: Static and Dynamic Finite Element Analysis of Structures- User's Manual, Berkeley, California.
  6. Clough, R.W. and Penzien, J. (1993), Dynamics of Structures, McGraw-Hill, New York.
  7. Chan, T.H.T., Law, S.S. and Yung, T.H. (1999), "An interpretive method for moving force identification", J. Sound Vib., 219(3), 503-524. https://doi.org/10.1006/jsvi.1998.1904
  8. Chan, T.H.T., Yu, L. and Law, S.S. (2000), "Comparative studies on moving force identification from bridge strains in laboratory", J. Sound Vib., 235(1), 87-104. https://doi.org/10.1006/jsvi.2000.2909
  9. Chan, T.H.T., Yu, L., Law, S.S. and Yung, T.H. (2001a), "Moving force identification studies, I: theory", J. Sound Vib., 247(1), 59-76. https://doi.org/10.1006/jsvi.2001.3630
  10. Chan, T.H.T., Yu, L. and Law, S.S. (2001b), "Moving force identification studies, II: comparative studies", J. Sound Vib., 247(1), 77-95. https://doi.org/10.1006/jsvi.2001.3629
  11. Chan, T.H.T. and Ashebo, D.B. (2006), "Theoretical study of moving force identification on continuous bridges", J. Sound Vib., 295(3-5), 870-883. https://doi.org/10.1016/j.jsv.2006.01.059
  12. Deng, L. and Cai, C.S. (2010), "Identification of dynamic vehicular axle loads: theory and simulation", J. Vib. Control, 16(14), 2167-2194. https://doi.org/10.1177/1077546309351221
  13. Deng, L. and Cai, C.S. (2011), "Identification of dynamic vehicular axle loads: demonstration by a field study", J. Vib. Control, 17(2), 183-195. https://doi.org/10.1177/1077546309351222
  14. Gordon, C.G. (1991), "Generic criteria for vibration sensitive equipment. Vibration control in microelectronics", Proceedings of International Society for Optical Engineering (SPIE), 1619, San Jose, November.
  15. Howard, C.Q. and Hansen, C.H. (2003), "Vibration analysis of waffle floors", Comput. Struct., 81(1), 15-26. https://doi.org/10.1016/S0045-7949(02)00348-6
  16. Jiang, R.J., Au, F.T.K. and Cheung, Y.K. (2003), "Identification of masses moving on multi-span beams based on a genetic algorithm", Comput. Struct., 81(22-23), 2137-2148. https://doi.org/10.1016/S0045-7949(03)00298-0
  17. Jang, Y.J. and Choi, G.H. (2006), "Introduction to automated material handling systems in LCD panel production lines", Proceeding of the 2006 IEEE, International Conference on Automation Science and Engineering, Shanghai, October.
  18. Ju, S.H. (2009), "Finite element investigation of traffic induced vibrations", J. Sound Vib., 321(3-5), 837- 853. https://doi.org/10.1016/j.jsv.2008.10.031
  19. Lee, C.L., Wang, Y.P. and Su, R.K.L. (2012a), "A study on AGV-induced floor micro-vibration in TFTLCD high technology fabs", Struct. Control Hlth., 19(3), 451-471. https://doi.org/10.1002/stc.445
  20. Lee, C.L., Wang, Y.P. and Su, R.K.L. (2012b), "Assessment of vibrations induced in factories by automated guided vehicles", P. I. Civil Eng.-Struct. Build. (Accepted).
  21. Law, S.S., Chan, T.H.T. and Zeng, Q.H. (1997), "Moving force identification: a time domain method", J. Sound Vib., 201(1), 1-22. https://doi.org/10.1006/jsvi.1996.0774
  22. Law, S.S., Chan, T.H.T. and Zeng, Q.H. (1999), "Moving force identification-a frequency and time domains analysis", J. Dyn. Syst.-T. ASME, 121(3), 394-401. https://doi.org/10.1115/1.2802487
  23. Law, S.S., Bu, J.Q., Zhu, X.Q. and Chan, S.L. (2007), "Moving load identification on simply supported orthotropic plate", Int. J. Mech. Sci., 49(11), 1262-1275. https://doi.org/10.1016/j.ijmecsci.2007.03.005
  24. Law, S.S. and Zhu, X.Q. (2011), Moving Loads: Dynamic Analysis and Identification Techniques, CRC Press, Boca Raton, Florida.
  25. Lopez-Almansa, F., Harbat, A.H. and Rodellar, J. (1988), "SSP algorithm for linear and nonlinear dynamic response simulation", Int. J. Num. Meth. Eng., 26(12), 2687-2706. https://doi.org/10.1002/nme.1620261208
  26. Nguyen, T.H., Gad, E.F., Wilson, J.L. Haritos, N. (2012), "Improving a current method for predicting walking-induced floor vibration", Steel Compos. Struct., 15(2), 139-155.
  27. Pan, T.C., Mita, A. and Li, L. (2001), "Vehicle-induced floor vibration in a multistory factory building", J. Perform. Constr. Facil. (ASCE), 13(2), 54-61.
  28. Pavic, A. and Reynolds, P. (2002), "Vibration serviceability of long-span concrete building floors: part 1- review of background information", Shock Vib. Dig., 34(3), 191-211.
  29. Pavic, A. and Reynolds, P. (2003), "Evaluation of mathematical models for predicting walking-induced vibrations of high-frequency", Int. J. Struct. Stab. Dyn., 3(1), 107-130. https://doi.org/10.1142/S0219455403000756
  30. Pan, T.C., Mita, A. and Li, L. (2008), "Evaluation of floor vibration in a biotechnology laboratory caused by human walking", J. Perform. Constr. Facil. (ASCE), 22(3), 122-130. https://doi.org/10.1061/(ASCE)0887-3828(2008)22:3(122)
  31. Shinozuka, M. (1971), "Simulation of multivariate and multidimensional random processes", J. Acoust. Soc. Am., 49(1), 357-368. https://doi.org/10.1121/1.1912338
  32. Tang, N., Amick, H. and Gendreau, M. (2009), "Long-span truss structures for low-vibration environments", Proceedings of ASCE/SEI Structures 2009 Congress, Austin Texas, April.
  33. Ungar, E.E. and White, R.W. (1979), "Footfall-induced vibrations of floors supporting sensitive equipment", Sound Vib., 13(10), 10-13.
  34. Ungar, E.E., Zapfe, J.A. and Kemp, J.D. (2004), "Predicting footfall-induced vibration of floors", Sound Vib., 38(11), 16-22.
  35. Wang, Y.P., Lee, C.L. and Yo, T.H. (2001), "Modified state-space procedures for pseudodynamic testing", Earthq. Eng. Struct. D., 30(1), 59-80. https://doi.org/10.1002/1096-9845(200101)30:1<59::AID-EQE996>3.0.CO;2-X
  36. Wang, Y.P., Liao, W.H. and Lee, C.L. (2003), "Seismic risk of typical double fabs in Taiwan's Hi-Tech industry", Proceedings of the Joint NCREE/JRC Workshop International Collaboration on Earthquake Disaster Mitigation Research, Taiwan, November.
  37. Willford, M., Young, P. and Field, C. (2005), "Improved methodologies for the prediction of footfallinduced vibration", Proceedings of International Society for Optical Engineering (SPIE) 5933, San Diego, July.
  38. Xu, Y.L., Guo, A.X., Li, H. and Ng, C.L. (2004), "Hybrid control of microvibration of high tech facility under horizontal and vertical ground", Proceedings of International Society for Optical Engineering (SPIE), 5391, San Diego, March.
  39. Xu, Y.L. and Guo, A.X. (2006), "Microvibration control of coupled high tech equipment-building systems in vertical direction", Int. J. Solids Struct., 43(21), 6521-6534. https://doi.org/10.1016/j.ijsolstr.2006.01.004
  40. Xu, Y.L. and Hong, X.J. (2008), "Stochastic modelling of traffic-induced building vibration", J. Sound Vib., 313(1-2), 149-170. https://doi.org/10.1016/j.jsv.2007.11.031
  41. Yang, J.N. and Agrawal, A.K. (2000), "Protective systems for high-technology facilities against microvibration and earthquake", Struct. Eng. Mech., 10(6), 561-575. https://doi.org/10.12989/sem.2000.10.6.561
  42. Yu, L. and Chan, T.H.T. (2003), "Moving force identification based on the frequency-time domain method", J. Sound Vib., 261(2), 329-349. https://doi.org/10.1016/S0022-460X(02)00991-4
  43. Yu, L. and Chan, T.H.T. (2007), "Recent research on identification of moving loads on bridges", J. Sound Vib., 305(1-2), 3-21. https://doi.org/10.1016/j.jsv.2007.03.057
  44. Zheng, D.Y., Cheung, Y.K., Au, F.T.K. and Cheng, Y.S. (1998), "Vibration of multi-span non-uniform beams under moving loads by using modified beam vibration functions", J. Sound Vib., 212(3), 455-67. https://doi.org/10.1006/jsvi.1997.1435
  45. Zhu, X.Q. and Law, S.S. (2002), "Practical aspects in moving load identification", J. Sound Vib., 258(1), 123-146. https://doi.org/10.1006/jsvi.2002.5103
  46. Zivanovic, S. and Pavic, A. (2009), "Probabilistic modeling of walking excitation for building floors", J. Perform. Constr. Facil. (ASCE), 23(3), 132-143. https://doi.org/10.1061/(ASCE)CF.1943-5509.0000005

피인용 문헌

  1. Stochastic micro-vibration response characteristics of a sandwich plate with MR visco-elastomer core and mass vol.16, pp.1, 2015, https://doi.org/10.12989/sss.2015.16.1.141