%0 Journal Article %A Hamed Jamshidi and Pooya Djamshidi %D 2011 %J International Journal of Mechanical and Mechatronics Engineering %B World Academy of Science, Engineering and Technology %I Open Science Index 52, 2011 %T Vibration Analysis of the Gas Turbine Considering Dependency of Stiffness and Damping on Frequency %U https://publications.waset.org/pdf/3166 %V 52 %X In this paper the complete rotor system including elastic shaft with distributed mass, allowing for the effects of oil film in bearings. Also, flexibility of foundation is modeled. As a whole this article is a relatively complete research in modeling and vibration analysis of rotor considering gyroscopic effect, damping, dependency of stiffness and damping coefficients on frequency and solving the vibration equations including these parameters. On the basis of finite element method and utilizing four element types including element of shaft, disk, bearing and foundation and using MATLAB, a computer program is written. So the responses in several cases and considering different effects are obtained. Then the results are compared with each other, with exact solutions and results of other papers. %P 757 - 762