Structural Dynamics Analysis Using Non-Uniform Fast Fourier Transform in Frequency Domain
Publish place: 8th National Congress On Civil Engineering
Publish Year: 1393
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:
NCCE08_0257
تاریخ نمایه سازی: 5 مهر 1393
Abstract:
Nonuniform seismic motion affects the seismic behavior of large structures such as long-span bridges. Three main reasons for this nonuniformity have been identified. They are local soil conditions, wavepassage, and incoherency effects. Other effects, such as extended source and attenuation, are relativelysmall. The importance of nonuniform seismic motions, especially for sensitive and important structures, has led to the development of several methods of analysis. This paper presents a direct frequency-domain method that is based on neural network and optimization. The use of this direct frequency-domain methodfor solving nonuniform seismic motions is shown. Finally, the application of the proposed method to asimple multiple particle damped system under harmonic loading is presented and the validity and feasibility of the transformation algorithm in time-domain and frequency-domain are numerically verified
Keywords:
Structural dynamics , Seismic wave , Nonuniform fast Fourier transform , Neural network , Optimization
Authors
Mohammad S. Ayubirad
PhD student in structural engineering at Shiraz University, Shiraz, Iran,
Mostafa A. Ayubirad
Graduate student in electrical engineering at Tehran University, Tehran, Iran
Jalal Akbari
Assistant professor, Dept. of civil engineering, Malayer University, Malayer, Iran