Kinematic Simulation And Finite Element Analysis For Hydraulic Excavator Backhoe Device

At present, the production of the domestic excavator is still at the stage ofimitation. The capability of R&D lacks and there are still plenty of gaps in quality,similarly to foreign products. Working device is one of the most important parts ofexcavator, and its performance has a tremendous impact on the whole work. In thiscontext, this paper has carried out the following research.Based on a large number of literature data, domestic and foreign research statuson working device of the hydraulic excavator is surveyed. working characteristicsand mining method of excavator are analyzed.The analysis on the motion characteristics of Excavator are carried out. In theAdams platform, kinematic simulation is done based on three-dimensional model ofExcavator working device. The simulation draws the diagram on the scope of workand gives the results of special working sizeBoom and arm are more prone to damage in the actual mining process. So thedangerous working conditions are determined according to the two parts. ThenSimulation on dangerous working conditions in the Adams platform is finished toobtain the calculation parameters which help to calculate hinge point force of boomand arm in the dangerous conditions.With finite element analysis software Ansys workbench, static strength analysisof boom and arm in the dangerous conditions are made. Based on the static strengthanalysis and modal analysis theory, the prestressed modal analysis is followed.According to the results, the natural frequency and deformation are solved.Based on finite element analysis, the structure of boom is optimized. So that thedistribution of stress turns more uniform and the peak stress is reduced.Based on the test of working device, the validity of the finite element model isverified through the experimental data.In a word, on the basis of the establishment of the virtual prototype of theexcavator working device, kinematic simulation of boom and arm in the dangerousworking conditions determines the positional parameters for the hinge point forcecalculation. Then take the results of calculations as the load conditions and carry outstatic strength analysis in the division of working conditions. Prestressed modalanalysis is followed on this basis. The entire analysis process is progressive and in close connection with the adams and Ansys Workbench software for static anddynamic finite element analysis and kinematic simulation. These have certainguiding significance for the design and development of the excavator workingdevice.