Dynamic Simulation And Finite Element Analysis Of Hydraulic Excavator Working Equipment

Hydraulic excavator is an important multi-functional construction machinery, commonly used digging materials above or below the bearing surface, and it has a wide range of applications in many aspects of the national economic construction, such as farmland reform, urban housing construction, bridge engineering, road construction, water conservancy construction, port construction, national defense construction and mining and so on. The working equipment is a significant part of the hydraulic excavator, its digging performance is closely related to the quality of the excavator and the level and quality of its design is also a significant indicator of the advanced machine. The force endured by the working equipment is more complex and changes frequently in the course of the work, so it is prone to arise various forms of failure conditions. Therefore, the study of the working equipment has a very essential significance.The backhoe working equipment is a kind of widely used structure form in hydraulic excavator, in this paper, it takes 14 tons of a backhoe working equipment of hydraulic excavator for the study, using the virtual prototype technology and finite element method makes a research for kinematics, dynamics and finite element simulation of working equipment. First, the paper gives a brief description of the component and working principle of the hydraulic excavator, using the three-dimensional software Pro/E to model the composition parts of the working equipment and complete virtual assembly, establishing the virtual prototype of the working equipment. Then put the model into ADAMS software for kinematics and dynamics simulation, according to the simulation it learns the operation parameters and verifies the correctness of the model by comparing the results with actual operation parameters. Then it carries out the dynamic analysis of some choosing conditions and gets the force curve of the hinge point for providing parameters to finite element analysis. Finally using the ANSYS software to complete the static analysis and modal analysis of the working equipment, the statics analysis of several typical working conditions reveals the distribution of stress and deformation on the boom, and it improves the structure of the boom due to the results. From the modal analysis shows its frequency and vibration by the order, which provides a reference for preventing resonance.Through the practice shows that the use of virtual prototype technology and finite element method is a rapid and efficient method for working equipment, which can greatly shorten the product development cycle and reduce the development cost.