Simulation of dynamic interactions of a vibration-isolated object

The purpose of this article is to present the application of the finite element method for designing objects requiring vibration isolation. A 113 MW generator operating in one of the combined heat and power plants in the Silesian Voivodeship was selected as the research object. A series of dynamic analyses in the frequency domain were conducted for three different models to verify the impact of using vibration isolation on the acceleration levels on the generator foundation. The analysis utilized the results of vibration acceleration amplitude measurements performed by employees of the Department of Robotics and Mechatronics at AGH University of Science and Technology to verify the computational model. The work was carried out as part of research project 4875/B/TO2/2010/38.The article presents the use of the finite element method to analyze the behavior of vibration isolation applied in the foundation of a 113 MW turbogenerator set. The foundation was set on six columns separated by vibration isolation based on helical spring packages. Dynamic analyses based on the modal superposition principle were performed, which allowed for the assessment of the effectiveness of the applied vibration isolation, taking into account the requirements for turbogenerator set foundations. The results were compared with experimental acceleration measurements taken before and after the vibration isolation. (…)

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