3 results listed
Railways require high investment costs and need continuous and controlled monitoring for defects on
the surface and inside the rail material. The existing nondestructive methods for crack detection are
commonly based image processing. This study provides a comparison of the existing methods, and
presents a new method to detect cracks also based on image processing. The present approach
utilizes the fuzzy logic coupled with the peridynamic differential operator. Its robustness is
demonstrated by detecting cracks in an image of a rail with cracks.
International Symposium on Railway System Engineering
ISERSE
Cihan Mizrak
Erdogan Madenci
Yusuf Yurekli
Fatih Pehlivan
The objective of this study is to generate two degree of freedom (2-DOF) rail vehicle model and to
effectively determine vibration characteristic of the model. Firstly, two degree of freedom mathematical
models were formed and equations of motion were obtained to examine vertical vibration of vehicle
model. After getting equations of motion, vibration analysis was performed using MATLAB-SIMULINK.
Then, the solid model of two degree of freedom rail vehicle model was created by means of computer
aided design software. Afterwards, solid model created in the previous section was transferred to
ADAMS dynamic analysis software and by selecting appropriate joints, degree of freedom constraints
of parts were determined. Finally, created model was performed in vibration analysis. According to
analysis results, vertical axis vibration values of ADAMS model were compared with two degree of
freedom MATLAB model and it was seen that results are in good agreement with each other. It was
determined that the error rate between ADAMS model and two degree of freedom MATLAB model is
1.12 %.
International Symposium on Railway System Engineering
ISERSE
Kerim Gökhan Aktaş
Fatih Pehlivan
İsmail Esen
Cihan Mizrak
Purpose of the paper is to design a basic two degree of freedom (2-DOF) rail vehicle model in
SOLIDWORKS software, to analyze vertical vibrations of the designed model in Motion Interface of the
software and to show the result is almost same with the result obtained by transfer function of the
system. In this study, to obtain dynamic response was used vertical harmonic excitations supplied by
slider-crank mechanism. Transfer function of the system was generated after getting equations of motion
and then the dynamic analysis was done by using SOLIDWORKS Motion Interface. As a result,
displacement, velocity and acceleration graphs taken from both methods were compared and this
comparison showed that the period values of both methods were exactly same after equilibrium position
and the amplitudes values of both methods had the same results by a maximum error of 0.87%.
International Symposium on Railway System Engineering
ISERSE
Fatih Pehlivan
Kerim Gökhan Aktaş
İsmail Esen
Cihan Mizrak