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Dynamic Analysis of Structures under Moving Loads in Time and Frequency Domain  

Kong, Min Sik (서울시립대학교 토목공학과)
Yhim, Sung Soon (서울시립대학교 토목공학과)
Publication Information
Journal of the Korea institute for structural maintenance and inspection / v.11, no.3, 2007 , pp. 87-94 More about this Journal
Abstract
A structural dynamic analysis can be divided into a time domain analysis and a frequency domain analysis. The time domain analysis makes use of a direct integration method or a mode superposition method and the frequency domain analysis applies a DFT method. Generally the DFT method is more effective method in case of calculating response of periodic excitation. But in case of transient excitation exact solution can not be acquired. So, by modifying the response or increasing the period accuracy of solution can be enhanced. Accordingly this study analyzed dynamic responses of structures under aperiodic moving load in time domain and frequence domain. Consequently it is concluded that exact solution would be get enough using DFT method by increasing the duration of free vibration or modifying the dynamic response.
Keywords
Dynamic Analysis; Moving Loads; Time Domain; Frequency Domain;
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  • Reference
1 Veletos, A. S. and Kumar, A., "Steady-State and Transient Responses of Linear Structures", Journal of the Engineering Mechanics, Vol. 109, No. 5, October 1983, pp.1215-1230.   DOI
2 Veletos, A. S. and Ventura, C. E., "Dynamic Analysis of Structures by the DFT Method", Journal of Structural Engineering, Vol. 111, No. 12, Dec. 1985, pp.2625-2642.   DOI   ScienceOn
3 Chopra, A. K., "Dynamics of Structures: Theory and Applications to Earthquake Engineering", Prentice Hall, 2001.
4 Humar, J. L., "Dynamics of Structures", Prentice Hall, 1990.
5 Henchi, K., Fafard, M., Dhatt, G. and Talbot, M., "Dynamic Behaviour of Multi-Span Beams under Moving Loads", Journal of Sound and Vibration, Vol. 199, 1997, pp.33-50.   DOI   ScienceOn
6 Mario Paz, "Structural Dynamics: Theory and Computation", Chapman & Hall, 1997.
7 Clough, R. W. and Penzien, J., "Dynamics of Structures", McGraw-Hill, 1993.
8 Blevins, R. D., "Formulas for Natural Frequency and Mode Shape", Litton Educational Publishing, 1979.
9 E. Oran Brigham, "The Fast Fourier Transform", Prentice-Hall, 1974.