Finite Element Analysis And Optimization Design On The Low Flatbed Semi-Trailer

The opportunities and degree of participation in the global logistics of China is increasing, but the mode and equipment of transport is still backward. There is a vicious and disorderly competition in the transportation market. Now China is in a critical period of economic restructuring and the transportation industry faces opportunities and challenges. Under the promotion of social, economic, energy conservation and environmental protection, semi-trailer, the main tool of load transport has been applied and developed rapidly in recent years. Although domestic trailer products have made great progress in terms of technology, there is a big gap between domestic and foreign trailer products. So how to accelerate the pace of development, and improve the technology level of the semi-trailer are key problems faced by Chinese semi-trailer transport industry.Supported by the Chuzhou HengXin industry and trade co.Ltd, the SX4256 16-meter low flatbed semi-trailer is analyzed in this paper, by using modern mechanical design method, Solid Works and ANASYS Workbench software and a lot of references. The main contents are as follows.(1) On the basis of the overall structure, market demands, transport and load requirements and related performance parameters of semi-trailer, the solid model is built in Solid Works according to structure parameters obtained from CAD drawings and simplified in accordance with simplifying principle and bearing requirements.(2) The frame model is imported to ANS YS Workbench to carry out static analysis and obtain the stress contours and deformation contours of the frame in both reversing and bending conditions. The strength and stiffness are verified by the static analysis results and the unreasonable location of frame are found, which provide the basis for the optimization design of the frame.(3) Natural frequencies and corresponding vibration modes are obtained by using ANSYS Workbench to do the modal analysis of the frame. The resonance can be prevented by analyzing the deformation of the frame.(4) Based on the topology optimization results, the removable areas on the frame are identified and the reasonable distribution of beams is obtained. The results make the material distribution of the frame more reasonable. The thickness of longitudinal beam and the parameters of beam are selected as design variables to complete optimization design and the optimization solution is selected and handled according to engineering practice. The modal of frame is built in Solid Works by selecting new size parameters, and then it is imported to ANSYS Workbench to verify the reasonableness of the results.