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| In order to achieve the simulation of multibody system dynamics and the visualization of the process and results rapidly, a new and large-scale software named MSTMMSim is designed and implemented. This software use transfer matrix method for multibody system (MSTMM) as the core of dynamics modeling and computation. And the Open CASCADE is used to generate the solid geometric figure. The proposed software solves the problems that the global dynamics equations of the system are necessary to be developed and the orders of the involved system matrices are too high to meet the engineering requirements of fast computation, in the research of general multibody system dynamics. The MSTMMSim comprises three components: the pre-processor, the MSTMM solver and the post-processor. The pre-processor contains physical and dynamics modeling. The solver applies MSTMM to call the dynamics model generated by the pre-processor, and get the computational results by iteration. The post-processor provides various auxiliary analytical tools such as curve and animation to analyze and process the results. The MSTMMSim has the following features and abilities: rapid computation of mulitbody system dynamics, direct calling CAD files, automatic generation of the computation parameters and results, data analysis and processing, dynamics process visualization and so on. Engineering application are given to verify the validity and accuracy of the software and to show that the software has friendly interface, fast computation speed, high level of visualization, and broad scope of application. Practice simulation indicates that the software provides an effective digital platform of fast dynamics calculation, design, analysis and optimization for complex mechanical systems. |
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| Keywords:multibody dynamics; software; transfer matrix method for multibody system; Open CASCADE; visualization; simulation; |
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