Dynamic Characteristics Analysis Of Working Device Of Single - Bucket Hydraulic Excavator

Hydraulic excavator is an important engineering machinery, which is widely used in water conservancy and road construction, ports and airports construction, national defense construction and other civil engineering fortifications. Excavator working device is the main executive body, its operating flexibility, reasonable structure, reliability, durability and dynamic characteristics are the main factors affecting the performance of the excavator. Therefore, it is significant for us to improve excavator operational capacity, especially on dynamics characteristic, structural vibration, fatigue damage, this paper mainly research on a type of hydraulic excavator working device dynamic characteristics analysis and optimize structural design Research.First and foremost, combined with the market demand and problems for excavators, we analyzed the excavators’ research status at home and abroad. By introducing of excavator equipment design, we leads to relevant theory to calculate the forces excavator working device, and to establish a favorable performance of the device structure analysis of several typical conditions. Then, we can base on the finite element theory to the actual parameters of hydraulic excavator, the use of three-dimensional software PROE three-dimensional model established working device, and by using finite element analysis software ANSYS, excavator working device modal analysis, the order of the first six natural frequencies and mode shapes, and finishes the strength of the working device analysis, three dangerous working conditions means the stress and deformation distribution.In the study on the method of structure design optimization, this paper proposes a hierarchical progression of portfolio optimization program, on optimization stage level, we can select the initial particle swarm algorithm to optimize the overall structure size, and refine to optimize the choice of optimization work workbench structure of the device, finally compare the two optimal results by the finite element analysis. The results of finite element analysis to verify the strength of the excavator working device meet the design requirements, and improve the natural frequency and the overall performance, so that the structure of the excavator working device design is more reasonable.