Focus On Analysis, Parametric Modeling Of Casting Crane Bridge Substructure Stress

Ladle crane loads a large number of pedigrees, with poor workingconditions, the bridge to withstand the heavy load of work. Especially againstthe molten steel, the structure of the bridge main beam directly affected by thefire baked mouth, its safety performance worthy of attention. The main beam ofthe bridge frame by the frequent impact loads, the transverse clapboard and theupper flange and web connected to the upper part of the weld, On the flangeplate and web weld and the diaphragm and web tension zone of the weld proneto fatigue failure；Cross-side cross section of the main beam mutations, smallfillet requirements of the steel plant production process, so that the cross-sidecross-section to withstand long-term alternating external load to cause stressconcentration; On the flange plate and web compression is easy to produce awave-likewarpage resulting in local structural instability;End beam deformationof main beam of the bridge frame stiffness effect,Insufficient rigidity caused byaccidents have also occurred；In addition,Temperature changes directly affectthe performance of the steel,ladle crane working environment temperature from-10degrees to50degrees,the lifting of molten metal forging hook, the boardhook radiation temperature is not more than300degrees, Steel yield point andultimate strength basically unchanged, If the bridge subjected to strong thermalradiation causes a surface temperature reaches or exceeds the material when thecritical temperature, need to install insulation protection device, and verify itsheat insulating effect.Difficult for traditional computing an accurate assessment of the bridgestructure of the complex parts of the stress distribution and the local stabilityproblem, this paper, we consider the structural features of ladle crane girderstructure, the use of APDL language, and the preparation of the application ofvisualization parameters of the overall bridges tructure of modeling. Andthrough the computer software and the finite element software docking,Completion of the different sections, different span different common structureof bridge main girder structure under static, dynamic analysis.On this basis,Refined structure complicated refinement analysis model, Focusing on the complex structure, the serious force points of stress concentration.Through theabove analysis, On the bridge structure of local structural rationality evaluationand improvement, Make the design of the structure are optimized It not onlyimproves the bridge main body structure design efficiency, ensure the ladlecrane bridge structure safety.