Automatic Loading And Unloading Of Bulk Materials Truck Chassis Finite Element Analysis And Experimental Research

With the rapid development of China's economy, and railway line structures and rolling stock to gradually develop in the direction of high-speed heavy load, road maintenance machinery for large-scale technical requirements gets higher and higher. Accordingly, the design of the mechanical structure of the large-scale road maintenance machinery bearing structural strength especially the key components of the structural strength chassis also has set higher demands on the chassis of the structure of the vehicle has an important impact on performance. Therefore, the structural strength of chassis for large road maintenance and mechanical design in the process of developing an important link.Finite element analysis technology to vehicle chassis engineering analysis is an important vehicle in the area of mechanical design of the research project. With the development of computer technology, finite element simulation solution chassis structure is increasingly becoming an important means of design problems. The numerical simulation that will provide a comprehensive understanding of various conditions in the chassis of the stress and strain distribution and vibration frequencies, to the designers of the scientific basis for the design, thereby improving design quality, shorten the design cycle and reduces design costs.This paper Large Railway Maintenance Machinery one of the bulk material of a particular model car chassis automatic loading and unloading as the research object, in conjunction with the chassis design of the structural features and requirements, application ANSYS general-purpose finite element software, the establishment of the chassis of Finite Element Analysis model. In this first model on the basis of a static performance analysis, respectively beam element of the chassis and shell element discrete, and a brief comparison of beam element and the respective merits of shell element, and shell elements as a final choice of the element type underframe of a finite element analysis, the static strength of the chassis, as well as bulk calculation results automatically to the maximum loading and unloading trucks on the link speed, fully loaded with fast-expected delivery, emergency braking conditions are typical of the dynamic strength Results. Through the stress and strain analysis of images obtained chassis slightly less than the strength of conclusions for the improvement of follow-up structure to provide the necessary basis. At the same time, the paper has also established a dynamic finite element model chassis, the chassis analyzed the binding mode and free mode, the chassis by 10 before the natural frequencies and mode shapes, the results (especially the first-natural frequency) for the follow-up to further improve the work provides a good reference.This paper also established a chassis beam steel structure of the stress and strain measurement system, through comparative analysis of the pilot test by means of stress values and finite element simulation results, they know the basic data anastomosis, which show that the establishment of the chassis FEM model is reasonable, the results are correct, the finite element method is effective and reliable, the results can be directly used to guide the design of the chassis improvements and performance analysis. Reference FEM calculation results, in view of the dynamic chassis structure of the problem of insufficient strength to the corresponding improved and the reasonable and effective improvement programme, the stress of dangerous conditions dropped significantly and makes chassis dynamic performance also improvements to meet the manufacturer of bulk material handling automatic car chassis higher strength requirements.