Research On Dynamic Modeling Of Multibody Simulation Based On Inheriting And Transforming And Application For The Development Of Low-Voltage Circuit Breaker

Dynamic modeling and simulation of multibody is very important in design and analysis of digitized product. The techniques of motion constraints recognition and information inheriting and transforming are put forward by deep researches in the model of multibody simulation. The discription method and algorithms for dynamic constraints model are also built. To improve design and multibody simulation model of low-voltage circuit breaker, the system for dynamic modeling of multibody simulation has been developed. The technique and method suggested have been successfully applied to the design of low-voltage circuit breaker.Chapter one first summarizes the status in dynamic modeling of multibody simulation technique, modeling of multi-discipline co-simulation technique, the simulation technique for the design of low-voltage circuit breaker, then discusses the existent problem. The research's significance and the contents are discussed.Chapter two discusses the connotative relation between location topological configuration of 3D model and motion constraints of multibody simulation model. In order to add motion constraints among parts automatically for a multibody system, degree of motion constraint and its algorithms are put forward.Chapter three researches the topological mapping configuration of the multibody simulation model in the heterogeneous systems. For inheriting the dynamic constraint information of the multibody simulation model, topological configuration of the multibody simulation model is built, and simplified constraint form of the multibody simulation model is put forward. To transform the information of the multibody simulation model, the offset matrix which transformed the location and orientation of constraints and the matrix which transformed the location and orientation of parts are computed.Chapter four discusses dynamic invocation and the exchange of simulation data among simulation solvers. For cooperative solving the problem composed of multibody dynamics knowledge and finite element analysis knowledge, a modeling method based on simulation solvers integration is put forward.Chapter five develops an intellectualized modeling of multibody simulation system for simulation and design of the low-voltage circuit breaker based on the motion constraint recognition technique, dynamic modeling technique and simulation solvers integration technique. And the framework and function of the system are discussed.Chapter six simulates and analyzes the capability of the low-voltage circuit breaker in different conditions and measures important capability parameters of it on the opening time with the intellectualized modeling of multibody simulation system. And the structure of the low-voltage circuit breaker is optimized by dynamic modeling technique.Chapter seven summarizes the research results of this paper, and gives the way for further research.