Abstract
The classical method used in railway design is to increase the results in the ratio of dynamic effect coefficient in order to make static analysis and consider dynamic effects. However, it is known that this method is not available for high speed railway lines and that it is necessary to make dynamic analysis; as it is impossible, in classical method, to calculate the very high dynamic loads and the resonance which occurs when the natural frequencies of railway coincide with the driving frequencies of train. Therefore, numerical analysis was made using ANSYS finite element program and the dynamic effects in resonance situation were determined for a sample ballasted line superstructure. Besides, the natural frequencies and dynamic effects of the road were measured on the field, and the sample was validated in accordance with these values.
Highlights
Bir dinamik sistem lineer bölgede, belirli bazı frekanstaki harmonik yüklere maruz kalırsa o sisteme has belirli bir deformasyon şeklinde titreşir
Alternatif olarak, beton döşemeli balastlı hatlarda kullanıldığı zaman, klasik balastlı hatta göre 30 Hz frekansın üstünde titreşimleri 10dBV azaltır, ancak kütle-yay rezonans frekansı (
PhD thesis, Faculty of Engineering, University of Pretoria, Pretoria, South Africa, 1997
Summary
Demiryolunda farklı nedenlerle meydana gelen titreşimleri azaltmak için, titreşim kaynağında, iletim hattında veya titreşim alıcısında bazı önlemlerin alınması gerekir. Kaynağında alınan önlemler en ekonomik ve en efektif olanlardır, demiryolunda titreşim kaynakları demiryolu taşıtı ve yoldur. Bu kaynaklarda alınabilecek etkili önlemlere çalışmada özet olarak değinilmektedir
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