挖掘机动臂的结构设计及有限元分析+CAD图纸
毕业论文关键词: 液压挖掘机；动臂；结构设计；有限元分析
Structural design of hydraulic excavator boom and Finite Element Analysis
Abstract With the development of our country, the use of excavators are more widely and the demand is growing. People pay more attention on its security, economic and other aspects . The study focus on a 6t hydraulic excavators .The design firstly analyzes the development history and research at home and abroad excavator hydraulic excavator, and on this basis for the future development trend of excavator industry to make a prediction. Secondly, the design method describes the research topics, mainly on the dimensions of the boom part of the structure through field mapping, then refer to other models were excavator boom structure is designed to give the size of the boom structure, the use of PRO / E Draw 3D models out arm, and then import the ANSYS software for finite element analysis. Finite element analysis technology makes this boom structure and size of the design is more accurate, reasonable and quickly. In the boom structure design process, the first parameter according to the requirement of the boom structure preliminary selection, and then force analysis and calculation of the boom, draw bending moment diagram, identify the most dangerous sections, the most dangerous section of study in determining the boom structure, size. In finite element analysis, the design of the structure is mainly boom static analysis, the first of the boom model simplification. Because the structure of the boom is relatively complex, using free mesh form unit pision. When setting constraints, according to stress analysis to boom and table hinge point, hinge point boom cylinder and the boom of constraint points. When a load is applied, the boom hinge point position by the force of different sizes, directions. Observe and record the boom structure of maximum stress and maximum strain, maximum stress occurs in the hinge point of the boom and the boom cylinder, the maximum displacement occurs at the hinge point of the boom and arm. The final analysis of this boom design meets the job requirements. By analyzing the results can be seen, this structural design boom to meet the requirements, the balance appropriate to achieve the purpose of this design for the boom structure design, which makes the boom more rational structure and the performance has been some improvement.