Model Integration And Behavior Synchronization Methods Of Multidisciplinary Simulation And Their Applications In Shield Machine

Modern products are most likely to be complicated multidisciplinary coupling system. Their design and manufacture involve multiple subjects such as mechanical, electronic, hydraulic, civil and control, and it's influenced by coupling of stress field, temperature field and seepage field etc. Such characteristics result in a long time design cycle and a huge cost. The use of virtual prototype simulation technology can make great improvement. For such complicated system, multidisciplinary simulation is essential.This paper investigates simulation model integration, load transfer between non-matching meshes and the driving and synchronization of simulation behaviors for the integration of multidisciplinary simulation of complex products, and develops the model integration and behavior integration modules of the simulation integration platform based on the research work. With the platform, the integration of multidisciplinary simulation and comprehensive performance evaluation is realized.The full content of the paper is organized as follows:The first chapter introduces a number of key technologies in multidisciplinary simulation integration, including the history, research progress and current problems, giving the background and content of the paper.Chapter II studies a simulation model integration method based on the correlation among layered information. In contrast with the existing model description methods, which apply only for one single field, the proposed model description method based on correlation among layered information can describe the multidisciplinary simulation model information for each subsystem of complex products. A correlation building method is also given to unify the sub-models. And a model integration system is developed to build and manage the multidisciplinary simulation models for complex products based on the research and is used to construct and integrate the sub-systems of the shield machine.The third chapter proposed a load transfer algorithm between non-matching meshes based on compactly supported radial basis function. To solve the key problem of multiple fields coupled analysis for non-matching meshes--the load transfer, the compactly supported radial basis function is introduced based on the existing interface element method, as well as the improvement of the interpolation distance based on topology. This algorithm is then applied to analyze the cutter and soil interaction under different geologies and proved effective.The fourth chapter introduced the parameter-driven synchronization method of multidisciplinary simulation behavior. Simulation behaviors are classified according to the simulation characteristics and each kind of behavior has different definition method. After definition, the parameter engine is introduced, and the behaviors are driven and synchronized by driving parameters. Examples of oil displacement simulation are given to validate the method.Chapter V introduces the structure and main interface of the multidisciplinary simulation integration system for complex products. The main functions of the platform includes the import and translation of CAD and CAE data, the edition of feature elements and the edition, driving and synchronization of behaviors. And several simulation cases of the subsystems of the whole section tunneling machine are given.The last chapter summarizes the main research content and achievements, and points out the areas for improvement and future research directions as well.