Finite Element Analysis And Structural Optimization Design Of Large Beam Of Machining Center Based On Abaqus

As a machining center component beam stiffness is insufficient，the workpiece to bemachined surfaces produce a ripple marks。In view of the above situation，Firstly, usesolidworks to build model, and then introduce the model into finite element analysis softwareabaqus to analysis static and dynamic performance of the beam. Based on the analysis of theresults, Firstly, adjust the boundary constraint condition, and then based on the sensitivityanalysis report of the beam structure parameters affecting its quality and requirement ofimprovement from the factory possessing the machining center, adjust the structuraldimensions of beam parameters, then put the model modified into abaqus to analysis,According to the results of analysis, adjust the size parameters, till reach the the expected goalin both stiffness and quality of the beam. Again optimize the beam modal that has beenoptimized as above with the thought of the unit structure.In this paper the static analysis of the beam includes: strength analysis, stiffness analysis.Use the first strength theory to make strength analysis. In this text the dynamic analysis meansthe modal analysis taking the first five order modes for research.There are so many size parameters of every part of the beam that it is impractical tooptimize them all. Therefore adjust the parameter with the largest sensitivity value accordingto the report of sensitivity analysis which studies how these parameters influences the gravityof the beam.There is still a big space for structure optimization, though size parameters have beenadjusted as above. So construct four new unit structures with the thought of unit structure andcontrast these unit structures to the original structure in the low order natural frequency ofunconstrained modal analysis. Restructure the beam model with the unit structure selectedand contrast the restructure beam to the original beam in the low order natural frequency ofunconstrained modal analysis. The result of the contrast is that the frequency value becomelarger to some extent.The structural behaviour of the beam has improved after the optimization above.