Finite Element Analysis Of Hollow Trunk Girder In Bridge Crane

Bridge crane is a kind of hoisting machinery that hold the widest use, the most quantity and upper generalized degree. At present, solid trunk loading structure is the widest use in engineering, whose weight is occupy 60% of crane weight. Significance of adopting logical loading structure construct modality is not just for lightening its weight, saving its wasting steels and reducing cost, but is also for lightening the load of workshop construction structure and saving capital construction expenses. There are many ways to reduce the weight of loading structure, and this paper will transfer the shape of loading structure's web plate to design new-style metal loading structure and achieve the purpose of reducing the weight of loading structure. The paper is a study of transfer web plate of trunk girder into hollow one.The paper done these works:1) Explaining the feasibility of hollow trunk girder by using classical mechanics theory;2) Structural analysis of hollow trunk girder was done by using classical mechanics method, and the relationship of its holing height with its stress and transmutation was calculated, by which the basic conditions for holing height need to meet was derived. It provided gist for hollow trunk girder design;3) Structural analysis of hollow trunk girder was done by using finite element method. Then compared its results with academic calculated results, by which the correctness of results was validated;4) Engineering example analysis was put up to a bridge crane produced by Dalian factory of hoisting machinery. Holing in its web plate and structural analyzing and comparing the results by using classical mechanics method and finite element software ANSYS, by which practicability of hollow trunk girder was validated.These results were found:1) Hollow trunk girder could save steel and reduce its weight, and it has more superiority under wind load;2) When hollow trunk girder was designed, holing height x need to meet five basic conditions in the paper;3) Compared with solid trunk girder, rigidity and intensity of hollow trunk girder were reduced, but it still could meet the demand under some conditions;4) For hollow trunk girder of different holing height, rigidity and intensity were reduced in different extent. For meeting demand of different idiographic engineering conditions, different holing height should be chosen.5) By using the analysis method in the paper, stress and transmutation conditions of bridge crane could be analyzed and calculated. It provides beneficial references to the design of girder structure in bridge crane.