The research paper presents the results of a modal analysis of selected bar domes. The description of geometry and physical features is based on specialist literature. A module added to the computer programme permitted the performance of dynamic calculations. The numerical models were developed using Autodesk Robot, implemented into the MES3D. The static and dynamic tests confirmed the correctness of the performed calculations. The paper presents some results of a modal analysis. Computational models presented here will be used in the analysis of the dome reliability in the case of dynamic loads.