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The article describes the research carried out using a complex numerical model which had been developed applying finite element method (FEM). The supporting structure on which two turbine generators (with a target capacity of approx. 100 kWe) were placed was the object of this study. The calculations were aimed to determine the influence of dynamic properties of the supporting structure on the operation of turbogenerators. Within this study the following tasks have been accomplished: computational modal analysis was performed, the stiffness coefficients of the tested construction were determined and compared with the dynamic properties of the bearings used. This was necessary in order to analyze the dynamic interaction between the rotor and the turbine’s bearings.

Analysis of dynamic compliance of the supporting structure for the prototype of organic Rankine cycle micro-turbine with a capacity of 100 kWe