Derrick's Structure Optimization And Dynamic Analysis Of Wheeled Hoist Tractor

Drill derrick is the important component of the pulling unit. As the typical department's structure of pole, drill derrick is the main accepted loads component. It is complicated to receive strength and practical operating modes. It is the foundation that the derrick is designed to carry on quiet strength to it. This thesis utilizes the finite element analysis software ANSYS, set up the geometric model of three-dimensional space of the derrick, carry on the quiet strength analysis of finite element in several kinds of operating modes such as wind load and calm load to the derrick while working, get the whole displacement diagram and the whole stress distribution diagram of the derrick. In order to get the safe, economic and reliable purpose, analyzing and optimizing these results. On the basis of model after the derrick structure is optimized, have carried on the model analysis, the instantaneous dynamic analysis, and the harmonic response analysis. Through analyzing derrick the first six step free vibration frequency and vibrating modes under the situation of self-weight, and the derrick when the hook load is under 1100 KN functions has the displacement - timing chart and the turntable harass violently the vibration displacement, draws the conclusion: Derrick by whole curving primarily, four vertical columns are the main carrying pieces, and first two column's bearing capacity is the weakest. Propose enhances the stability of the structure and bearing capacity through change the section size and the material, and enhances the rigidity of the structure through optimize the section parameters.