Structural Analysis And The Optimization For Traveling Equipment Of Elevated Bulldozer

Because the bulldozer has high efficiency and good ability to adapt to theground, so it is widely used in infrastructure construction and national defenseconstruction, etc. With the increase of demand for bulldozer at home and abroad, thevarieties of bulldozer in competition and development is becoming more and morefierce. Especially in the elevated crawler bulldozer development, because itcompared with the traditional crawler bulldozers in structure, performance and lifehas a great improvement, so it is widely adapted for large tonnage bulldozer model.The research on the traveling equipment has been the problem of developmentabout bulldozer. Its working environment is relatively poor, so the walkingmechanism has been often the part of damage. In the design, the reliabilityrequirement of the walking mechanism is relatively high. Through taking advantageof the finite element to analysis the walking mechanism, we can find the defects assoon as possible in the design and make the design feedback at the same time.According to the consequence, we can make relevantly modification. This way cangreatly shorten the development cycle of the produce, which can reduce the cost ofresearch, nowadays becoming a suitable method of product development.Firstly this paper from the research present situation on the running systemstructure of the bulldozer, according to the previous research direction, which sumsup the research methods about walking mechanism. Relying on the driving theory,then based on elastic mechanics and finite element theory as the foundation, whichprovides the reliable theory basis for following-up on structure analysis andoptimization.The project that bulldozer running system structure on analysis andoptimization advance process, first of all according to material mechanics theoryknowledge, putting the walking frame and tension device of the bulldozer as a whole to contact with the stress analysis calculation. We can take use of the analyticalmethod to extract stress that is the maximum stress on the risk surface. These datacan serve the next step to contact with the finite element analysis as reference data.Secondly to analyze the structure with the finite element theory, drawing theentity model of walking mechanism with the Pro/E software, then import thecompleted model into Hyper Mesh software to draw mesh. Finally, import the finiteelement into the ANSYS software to calculate. Based on the dozen of dangerousworking conditions, we can perform calculations against the walking mechanism, atthe same time, to analyze the corresponding the results.According to the analysis result of structure, the structure that the area is verylarge to super allowable stress should be modified. The modified model should bere-checked the strength and stiffness, thereby checking the effect of the structuraldesign modifications.Last but not the least, the paper optimize the modified structure of walkingmechanism with the design opt optimization components of ANSYS software. It isthe optimized standard that the large size plates have low stress what the platethickness regard as design variables. Meanwhile, the constraint conditions can usethe corresponding stress and deformation of the plate, and own weight of walkingmechanism as the objective function. According to the structure optimization, we cansearch for the optimal plate thickness matching parameter data. So as to find thestructure of walking mechanism that meet the design requirements of economicreliability design, and achieve the purpose of running system weight loss.This paper combines driving theory and the theory of finite element withManufacturer put forward dangerous conditions and destruction of the position ofthe component as a cornerstone. Using finite element analyze structure andcalculation. On the basis of analysis results, structure that is relatively danger onsome region is made appropriate modifications. Then check the modified scheme.Through structure optimization that we can get the best matching scheme aboutthickness. The research method can be applied in similar engineering machineryresearch and development, in the meantime, which provided a reference method and reliable basis for the practice.