Browse > Article
http://dx.doi.org/10.12989/sem.2013.45.4.543

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)
Publication Information
Structural Engineering and Mechanics / v.45, no.4, 2013 , pp. 543-568 More about this Journal
Abstract
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.
Keywords
micro-vibration; automated guided vehicle (AGV); liquid-crystal-display (LCD); moving loads; modified Kanai-Tajimi model; power spectral density (PSD);
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 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.   DOI   ScienceOn
2 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.   DOI   ScienceOn
3 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.   DOI   ScienceOn
4 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.   DOI   ScienceOn
5 Deng, L. and Cai, C.S. (2010), "Identification of dynamic vehicular axle loads: theory and simulation", J. Vib. Control, 16(14), 2167-2194.   DOI   ScienceOn
6 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.   DOI   ScienceOn
7 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.
8 Howard, C.Q. and Hansen, C.H. (2003), "Vibration analysis of waffle floors", Comput. Struct., 81(1), 15-26.   DOI   ScienceOn
9 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.   DOI   ScienceOn
10 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.
11 Ju, S.H. (2009), "Finite element investigation of traffic induced vibrations", J. Sound Vib., 321(3-5), 837- 853.   DOI   ScienceOn
12 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.   DOI   ScienceOn
13 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.   DOI   ScienceOn
14 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.   DOI   ScienceOn
15 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.   DOI   ScienceOn
16 Zhu, X.Q. and Law, S.S. (2002), "Practical aspects in moving load identification", J. Sound Vib., 258(1), 123-146.   DOI   ScienceOn
17 Zivanovic, S. and Pavic, A. (2009), "Probabilistic modeling of walking excitation for building floors", J. Perform. Constr. Facil. (ASCE), 23(3), 132-143.   DOI   ScienceOn
18 Borse, G.J. (1997), Numerical Methods with MATLAB: A Resource for Scientists and Engineers, PWS Publishing, Boston.
19 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.
20 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.   DOI   ScienceOn
21 Computers and Structures Inc. (2002), ETABS: Three Dimensional Static and Dynamic Analysis of Structures-A Physical Approach with Emphasis on Earthquake Engineering, Berkeley, California.
22 Computers and Structures Inc. (2005), SAP2000: Static and Dynamic Finite Element Analysis of Structures- User's Manual, Berkeley, California.
23 Clough, R.W. and Penzien, J. (1993), Dynamics of Structures, McGraw-Hill, New York.
24 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.   DOI   ScienceOn
25 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.   DOI
26 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.   DOI   ScienceOn
27 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).
28 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.   DOI   ScienceOn
29 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.   DOI   ScienceOn
30 Law, S.S. and Zhu, X.Q. (2011), Moving Loads: Dynamic Analysis and Identification Techniques, CRC Press, Boca Raton, Florida.
31 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.   DOI   ScienceOn
32 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.
33 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.
34 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.
35 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.   DOI
36 Ungar, E.E. and White, R.W. (1979), "Footfall-induced vibrations of floors supporting sensitive equipment", Sound Vib., 13(10), 10-13.
37 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.   DOI   ScienceOn
38 Shinozuka, M. (1971), "Simulation of multivariate and multidimensional random processes", J. Acoust. Soc. Am., 49(1), 357-368.   DOI
39 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.
40 Ungar, E.E., Zapfe, J.A. and Kemp, J.D. (2004), "Predicting footfall-induced vibration of floors", Sound Vib., 38(11), 16-22.
41 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.   DOI
42 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.
43 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.
44 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.
45 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.   DOI   ScienceOn
46 Xu, Y.L. and Hong, X.J. (2008), "Stochastic modelling of traffic-induced building vibration", J. Sound Vib., 313(1-2), 149-170.   DOI   ScienceOn