Finite Element Analysis And Optimization Of Large Thickness And Width Stabilized Soil Paver’s Truss Structure

A large thickness and width paver designed by a certain company was taken as the research object, and the structure characteristics were analyzed. Under the condition of maximum pave width, the working resistance of paving different kinds of stabilized soil mixtures was analyzed and calculated. Taking paving lime soil with maximum width as the limiting condition, the force analysis of the large thickness and width paver’s truss structure was conducted, which provided the base of the strength analysis to the truss structure.The thesis is based on the ANSYS software. The finite element model of truss body using beam element was built, and the static analysis to the structure was conducted. The model of traction frame and paving plate was built based on Solidworks, and the model was imported to ANSYS and the finite element analysis was conducted. The traction frame under two working conditions straight line driving and steering travel was analyzed. The result of finite element analysis shows that: the whole stiffness and strength of the truss body can meet the requirements, and there is a large margin on the bars located in the middle part of the truss body and it can be optimized further. The traction frame’s stiffness and strength can meet the requirements under the condition of straight line driving, but the maximum stress under the condition of steering travel with maximum turning angle is close to the allowable stress and there exists large deformation. The structure of traction frame needs to be improved to meet the requirements of strength and stiffness. The strength and stiffness of paving plate can meet the requirements and it doesn’t need improvement.The parametric model was built in ANSYS based on the finite element analysis of large thickness and width paver’s truss body. Taking the volume of the truss body as the target, the section size of the bars located in the middle part of the truss body was optimized. The optimization result shows that the weight of the truss body was reduced by 19% compared with the weight before optimization. The structure improvement of the traction frame was conducted based on its force deformation. The maximum equivalent stress and maximum deformation of the traction frame after improvement were meet the requirements compared with the traction frame before improvement.The modal analysis of the whole truss structure before and after optimization of the large thickness and width paver was conducted, which provided the theoretical basis of the avoiding resonance in the work process.