| The main arm is the key components and the main force-bearing parts of the excavator. In the process of constructions, the excavator should bear complex impact load. Well, the moves designed by traditionally static and experiential ways often appears the following problems: the intensity falls short, the rigidity surpasses the scope. And that whether the intensity and the rigidity of moves satisfy requirements directly affects the working safety. Therefore, the comprehensive understanding of the load bearing stress, the strain level, the vibration frequency and the rigidity and the intensity distribution situation of moves in the working process has quite important functions for us to optimize the structure of moves.The aim of this paper is to develop a new type excavator, using Pro/Mechanica to dynamically analyze the structure of moves.At first, the paper analyzes the kinematics of working installment and the stress. It introduces the working of excavators and briefly discusses few factors of forming resistances while excavating. Then it establishes kinetic models of working installments of excavators and then makes kinematics emulators. Then, it uses Pro/Mechanica to analyze three typical stress of the moves, study its strain and distortion, validate that the intensity of moves accords with designing requirements. After that, it analyzes the mode construction of the moves and finds its main vibrating model. At last, experiments are carried to test instances when the stress deforms and vibrates. Then it compares the results of experiments and the finite element analysis. |
