The design of forestry harvesting machines connecting rod based on finite element analysis

With the continuously strengthening of the forestry harvesting machine, the working conditions of the connecting rod mechanism became more complex. In operation, the connecting rod is subjected to both gas pressure and inertia loads, and therefore, it must be adequately strong and rigid and light in weight as well. In order to improve the sufficient fatigue strength, stiffness, well static and dynamic mechanical properties under a variety of alternating load condition, it became a key question that how to even more base design decisions on virtual prototypes and to optimize the whole mechanism development process. In the paper, firstly, we propose a physical model of connecting rod mechanism. Secondly finite element analysis and simulation of the model is taken. Then its flexible multi-body dynamic model is established by ADAMS/View. The method provides the theoretical evidence for connecting rod structure improvement and optimum design.