Simulation Analysis Of Working Device On Bulldozer

Bulldozer is an important engineering machinery, and it has playing an important role in modern society. Which has being used in construction, communications, the building up of national defense, mining and so on. One bulldozer model was built and the dynamics simulating is made on the working equipment of this machine according to the analysis of bulldozer’s current status both at home and abroad. The pushrod and hydraulic system, as a key part, was simulated and analyzed by the way of rigid-coupling simulation and hydraulic-mechanical simulation based on virtual prototype technology according to the reality that the pushrod is broken when the machine working. The main research achievements are as follows:1. The working device of bulldozer’s dynamics modeling and simulation analysisThe object of study is a certain type of bulldozer, then the 3D model of the whole machine was built by Pro/E. By using Mech/Pro module, the 3D model of the balance weight mechanism was transferred to Adams seamlessly, dynamics simulation with actual different working situation has been conducted, the pushrod and hydraulic cylinder stress curves and various hinge points stress curves were obtained.2. The working device of bulldozer’s rigid-flexible coupling modeling and simulation analysisThe modal neutral files of the linkages and swinging frame were created in ANSYS, and then transferred to Adams. In Adams, the rigid-flexible coupling model of the working equipment of this machine was simulated, and the dynamic stress and strain messages of the pushrod were obtained.3. The hydraulic-mechanical coupling modeling and simulation of working device.The hydraulic model of the working equipment of bulldozer is built using Adams/hydraulics module. Then, the co-simulation of hydraulic-mechanical coupling model was carried out. The pressure, flow rate and some other related parameters of the mechanism affected by mechanical and hydraulic system were obtained, which will be useful in performance evaluation and choosing hydraulic components of the hydraulics system.