Research on theoretical modal analysis method of load simulation system

Abstract In order to study the modal analysis of large structures, this paper uses a load simulation system as the research object and uses different methods to calculate the natural frequency according to the characteristics of different systems. Because the elastic moment loading subsystem is relatively independent and its main motion mode is considered, it is equivalent to a cantilever beam, and the modal analysis is carried out using the theoretical calculation method. According to the simple structure of the shafting subsystem and its characteristics as the most important moment transmission component, it is equivalent to a simply supported beam, and the modal analysis is carried out by theoretical calculation method; given the complex structure of the load simulation system, the modal analysis is carried out utilizing simulation analysis. By comparing the results of these analyses, it is found that different modal analysis methods should be adopted for structures with different characteristics to obtain more accurate analysis results.