Research and practice of model management in virtual prototype collaborative simulation platform

Aiming at the requirement of safely saving multi-domain, multi-level, multi-revision models and expediently building simulation platform of Virtual Prototype Collaborative Simulation Platform, This paper introduces the characteristic of models in the whole lifecycle from simulation beginning to ending and describes detailed two key functions including model revision management and model structure management on base of referring PDM (Product Data Management) system, in the last explains the design pattern of these two key functions which using the Iterator conception of design patterns to realize. In the base class encapsulates the operation on the Database result set like the add or delete operation and all the alternations with the database and in the derived class completes all functions of logic level such as building of model's structure and saving the structure in the database.