Dynamic Analysis And Parametric Research On Virtual Prototype Of New Face-shovel Excavator

Engineering machinery is the basis of the rapid development of the national economy. As a kind of engineering machinery, excavator plays a very important role in the industrial and civil construction, road construction, mining, water conservancy and hydropower project construction and national defense construction. With the rapid development of national economy, the demand of large hydraulic face-shovel excavator is increasing day by day, especially in the large-scale mining and opencut coal mine. The technology of large hydraulic face-shovel excavator attracts more and more attention. However, in our country the research on technology of large hydraulic face-shovel is still relatively few and as a result of we have no independent intellectual property rights for mechanism of large hydraulic face-shovel excavator, the development of large hydraulic face-shovel excavator is limited to the protection of foreign patent. Therefore, in this paper based on a new mechanism of large hydraulic face-shovel excavator, the mathematical model of dynamics and parametric virtual prototype was built and analysed.Firstly, based on Lagrange’s method, this paper built dynamic mathematical model on this new working device of face-shovel hydraulic excavator in one whole excavating process. On the condition of giving one group of relative data, the dynamics was soluted. Three driving force curves of the driving hydraulic cylinders were drawed and some relative analysis was done.Then, three-dimensional model of the excavator which was established by modeling software was imported into ADAMS software and then the virtual prototype of new working device of face-shovel hydraulic excavator was built. By adding the appropriate quality attributes to the virtual prototype, dynamic simulation was carried out in a given working process, and the compared with the theoretical solution was analysed.Finally, based on the function of parametric modeling in ADAMS software, the parametric virtual prototype of new working device of face-shovel hydraulic excavator was built by using the method of parametric points. Regardting the value of moment arm and the difference value of the moment arm in boom cylinder and stick cylinder as the optimization objective, the positon of cylinder joints were analysed based on the function of parametric analysis in ADAMS software,and the compared with previous datas in value of the objective and the driving force of cylinder was analysed.