Special Section Of The Bridge Crane Girder Stress Analysis

With the rapid development of economic construction, the large tonnageoverhead crane has been widely used in production. Large tonnage overheadcrane work frequently, often fully loaded and even overloaded with work,running high-speed, poor working conditions, running with frequent starting andbraking, in addition to track grievances and improper operation caused by theimpact load with the main beam the junction of the main web of the cross-sidevariable cross-section and under the cover of stress concentration caused by hereoften cracks, in the lid to open the door, web open the door and weaken the partsof the fillet stress is large phenomenon. All of these directly affect the use ofcrane performance and normal production, manufacturers and users have causedhuge economic losses. The use of traditional mechanical analysis methodespecially like the cross side of the main beam of variable cross-section of largetonnage overhead crane bridge structure, on the cover to open the door at thecross-section, the stress state of the web to open the door at the cross section ofthese special section at the calculation and analysis of formulas, complex, anddifficult to precise, it is difficult to accurately reflect the actual stress state.End beam non-articulated large-tonnage double girder overhead crane, withVisual C++6.0development tools, object-oriented programming to develop a setof conventional calculations and finite element analysis software inone,conventional calculation methods and finite element analysis methods wereused to the proximal beam, main beam, variable cross-section, on the cover toopen the door at the cross-section, the special section of the web to open thedoor at the section at the stress state analysis and efforts to study the impact ofthe special section at the stress statedistribution of the various factors and eachfactor to change the trend of the stress state. Details are as follows:(1) The use of conventional calculation method were calculated in the crossof the main beam cross section, proximal beam variable cross-section, on thecover to open the door at the cross-section, typical checking point on the web toopen the door at the cross-section value of the stress; (2) With the finite element analysis software ANSYS finite elementanalysis of bridge structure, according to the actual load distribution, load, weresolved by the main girder span section, the proximal beam variable cross-section,on the cover to open the door at the cross-section,web open the door at thecross-section of the equivalent stress contours;(3) The use of Visual C++6.0to write software, conventional calculationand finite element analysis program,object-oriented programming interface tochange the corresponding parameters can be obtained by conventionalcalculation results and finite element analysis results;(4) With the conventional calculation and finite element analysis software,through a series of calculations and analysis of various factors, stressdistribution and analyze the results obtained by conventional calculation andfinite element analysis, summed up the corresponding conclusions.