Simplified Method for Special-shaped Body in Simulation Analysis of Structural Dynamic Characteristics

During the computer simulation analysis of structural dynamic characteristics of part assembly, it is difficult to mesh and build the 3D model for some special-shaped components such as frame-hang engine of motorcycles. Starting from the basic principle of the simulation calculation, this paper investigated the parameters which had a great influence on the analysis results, such as mass, centroid and moment of inertia. Moreover, these parameters were verified by simulation analysis based on simplified method, which could get better results after considering the mass, centroid and moment of inertia. In addition, two engineering application examples further proved the feasibility of simplified method for special-shaped body in the process of simulation analysis, thus making it possible to predict the structural dynamic characteristic of assembly early in the design or improvement stage, greatly shortening the research and development cycle and significantly saving the cost.