Finite Element Analysis For Scheme Design Of Upper-car Of Large-tonnage All Terrain Crane

With the Feature of good off-road capability, flexible, reliable work, all terraincranes are widely used in infrastructure construction. There are many all terraincrane suppliers in the world which have accumulated of advanced technology, andthey monopoly large-tonnage all terrain crane market in a long time. Recent years,our national infrastructure construction greatly stimulates the competition betweenconstruction machinery enterprises in domestic, crane moving in direction inlarge-tonnage development. As important engineering machinery, crane is widelyused; demand for crane has increased annually. Gradually large-tonnage all terraincranes are researched and developed.The structure of large-tonnage all terrain crane is more complex, flexible forms,nonlinear materials applications, statically indeterminate structure design, andtraditional method can not meet the requirements of structural calculations. So inscheme design of all terrain crane. Structure calculation is the key issues encounteredin the design. With the rapid development of computer hardware and finite elementtechniques, finite element techniques can easily solve the structural calculations, andcalculation accuracy and efficiency are quite well. Therefore, for ultra-large-scalestructure, finite element method is more reasonable.In order to break the monopoly of foreign technology, ranks among cranesdeveloped thriving enterprise, XCMG decided to research and development certainlarge-tonnage all terrain crane. In scheme design of the crane, the scheme designof upper-car is calculated with ANSYS software. Typical conditions are calculatedand feedback of the calculation result of the corresponding conditions, designersmake program changes accordingly, until the final plan is perfect. Specific practicesare as follows:Firstly, finite element model is created according to the scheme design, beamelement is used to simplify the scheme design of main arms, the use of thesimplified beam model calculation and analysis of the main arms program, the simplified beam model is calculated to check the design, if the design is not able tomeet the requirements the typical conditions usage, modify the scheme until thefeasible solution.Then, build the parametric jib modeling, main arm model is created manuallyaccording to the scheme design, optimize the jib design by ANSYS optimizationmodule. Calculate and analysis this optimized scheme. After checking, the optimizedscheme meets the design requirements.Finally, simplify the Turntable scheme to be a finite element model, apply loadand analysis the model, analyses the scheme of turntable to find the weak part andgives advice. At last the turntable meets the Mechanical strength criterion.In the scheme design the All terrain crane, computational analysis usingANSYS software, significantly reduces the computation time, improve the efficiencyof the design the shorten the product development cycle, research and developmentof high reliability products. This approach has been recognized by enterprise.Compared with Western developed countries, China’s urbanization level arestill relatively low, with the continuation of western development and infrastructure,domestic construction machinery industry is promising. As a branch of engineeringmachinery, truck crane is a important construction machinery, and it is widely usedin social construction.The truck cranes especially large-tonnage all terrain cranes develop quicklythese years, The market potential is huge, All terrain crane large tonnage is bound toplay a greater role in the engineering construction.