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Title |
Dynamic Analysis of Structures under Moving Loads in Time and Frequency Domain
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Keywords |
동적해석 ; 이동하중 ; 시간영역 ; 주파수영역 Dynamic Analysis ; Moving Loads ; Time Domain ; Frequency Domain |
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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.
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