Research On The Dynamic Design Of Large Cargo Vehicle Structure Based On Finite Element Method

With the continuous development of the industrial prefabrication and assembly technology,the research on the production and production technology of prefabricated components is deepening,and the prefabricated modular chemical plant emerges as the times require,and its transportation process becomes the focus of the whole project.As the load-bearing carrier of goods in transportation,the bending deformation and dynamic characteristics of flat transporter structure are related to the safety of the whole operation process.The frame is often deformed due to stress concentration.At the same time,the simple harmonic force generated by the driving motor will cause fatigue wear of the frame.If its excitation frequency is equal to or close to the natural frequency of the frame,the frame will produce resonance,which will affect the safety of cargo transportation.In this paper,a finite element model is established based on the track flat car of a modular chemical plant,using SolidWorks Simulation software analyzes the stress and deformation of the frame under three different working conditions,evaluates the frame structure through static strength test;studies the first eight modes of the frame by using the frequency module in the software,analyzes the harmonic response of the frame by using the linear power module,obtains the frequency response curve of the frame,and evaluates the dynamic characteristics of the frame through the test mode analysis.At the end of this paper,three optimization methods are summarized.Topology optimization method is used to design the frame structure lightweight.The key data is extracted and compared with the static characteristics of the frame under full load bending condition,which provides a reference for the frame structure design.