The Establishment And Application Of Shell Model Of Overhead Traveling Crane

This paper summarizes the status , the dynamic development and direction on the modern industry of bridge crane at home and abroad, design and study the finite element analysis model of bridge crane. Accomplish Three-dimensional design parameters and variable modeling of Simplified shell model of bridge crane. And apply finite element analysis theory to the bridge structure of static analysis, to achieve the purpose of guidance of the design and improve the technical performance of the bridge crane. The main work is as follows:1,Apply parametric design method, accomplish the further development of SolidWorks which is the commercial CAD software ,by the programming language Visual C++6.0 which is oriented to object and COM interface technology. Viz achieved the further development of SolidWorks by the use of API functions, apply the Class CSldWorks to accomplish the operation of starting, closing, sketch drawing, creating entity feature such as extension, cutting and shell and so on.2,This paper study the simplified shell model of bridge crane and design the Parametric procedures. In order to facilitate the finite element analysis, call the shell function of the class CSldWorks and simplify the bridge crane into the overall shell model,Omit the link connecting, platform, ladders, Parapet and conductive part which have little effect on finite element analysis, facilitate decomposition of grid , load border Constraints and loads.3,Modify the shell model, call the extention function of the class CSldWorks, pull out a big gap plate on the inner surface of the Flange plate, in order to meet the requirements of stability; Extend the thicker plate of the shell and the outstanding part of flange plate by calling the extention function to acquire the more practical model. 4,On the base of structure analysis , creating the model of main girder, element partition , DOF disposal and loads disposal etc by using the finite element analysis software COSMOSWorks. The study process mainly uses a static analysis of the research method, use the finite element analysis software COSMOSWorks, get out the static distribution of displacement and stress, and compare the results on the key nodes and values that test on the real product. Get stress and its distribution of bridge - crane structure, the computing results compared with the traditional mechanics results.5,Through finite element analysis, the results of simplified shell model are basically consistent with the results of the mechanical model. The time of finite element analysis is shorter than the complete model, and use less storage space than the complete model. But the results of the analysis are also consistent. This shows that the simplified shell model is more simple , practical and convenient for finite element analysis.This paper mainly achieve parametric generation of the simplified shell model of the bridge crane through the shell and stretching method, fully considerate of the actual load-bearing state of the bridge structure on the basis of the establishment of three-dimensional finite element model of the bridge structure. Do the finite element analysis of static by using the finite element analysis software COSMOSWorks. The main conclusion is as follows: (1) From the results of the static analysis of the bridge, it can be drawn that the established simplified shell model meet the requirements of the finite element analysis. (2) know the distributing location of the largest stress and deformation according to the results of the finite element analysis of stress and deformation, which is basically consistent with the actual situation and the trial, as the weak parts of a bridge structure it should be regarded as the focus when assess the load-bearing capacity of the bridge structure. (3) Compared with the traditional mechanical calculation method, the results of the finite element method obtained by a slight deviation. Considering the necessary simplification of the finite element model and the and the approximation of the traditional mechanical calculation, it is believed that the established finite element model is credible, and its results are science and reliable.