Research On Numeric Simulation Integrated System Of Crane Based On PATRAN

Portal bulk ship unloader is a type of hoisting and conveying machinery for the completion of ship discharge. With transport quantity of dry bulk coal and iron ore increasing, the demand of the portal bulk ship unloader is also growing, and the requirement for design and production efficiency is getting higher and higher.With the development of computer technology and numerical methods, finite element method (FEM) is widely used in crane design and analysis. The design efficiency has been improved, but the process of traditional manual analysis with general finite element analysis (FEA) procedures is very cumbersome, inefficient, and prone to error. In addition, certain parts of ship unloaders, especially chain bucket ship unloaders, tend to rotate along the horizontal or vertical direction during the course of work, and there are many loads and load cases in strength analysis. These lead to much duplicate pre-processing work, and the advantage of general FEM calculation can not be taken fully. Therefore, taking advantage of general FEM calculation effectively and improving the design and analysis efficiency of portal bulk ship unloader quickly have great economic significance and practical value. The background of this subject is the project"Special FEA System of Crane", which is cooperated by CSSRC and a Japanese company. The research object is mainly chain bucket ship unloaders and bridge-type grab ship unloaders. Numerical simulation and integrated system of crane based on PATRAN is developed using CAE secondary development technology and FEA method. This paper details the research and development of the system.In this paper, a special analysis process is customized according to the structural characteristics of ship unloader and the actual working conditions, and experts'experience and knowledge on the analysis of ship unloader is integrated. An intelligent expert system used by steps is developed based on MSC.Patran using the secondary development language PCL and MSC.Acumen. First, model data of ship unloaders, section information and section calculation method have been integrated. Second, model rotation method is applied to FEA pre-processing of ship unloader, finite element models under all rotation angle can be generated rapidly, and batch calculation are realized. Finally, some special function, which can expand the function of MSC.Patran, is realized based on MSC.Acumen. Practice shows that the analysis and handling process of the system meets the analysis requirements of the ship unloader, and this sytem can shorten the analysis cycle significantly and improve design efficiency rapidly.