FEM Analysis Of Large Tank Truck Based On ANSYS Workbench

With the increasing development of national economy, the need of large tanks used in industry is being increased, the size and weight are also constantly on the rise. With regard to transport of the tanks, large tank truck has attracted more and more attention. It is desired that both strength and stiffness of the tank truck meet the requirements of security and the weight can be reduced as much as possible. The traditional design method is time-consuming and laborious with long design cycle. Finite element method is a numerical calculation method featured with high efficiency, can greatly reduce development costs.The analyses of structural strength for tank truck were carried on, mainly concluded as followings:(1) Three-dimensional modeling and pretreatment. The model was established in Pro/e, and in order to simplify the model, some small parts were omitted. Then the model was imported in ANSYS workbench software. The meshing, boundary condition and constraints were achieved.(2) Analyses of strength were performed under load of 200 ton for normal operating condition and 400 ton for maximum operating condition. The stress and strain of two cases were obtained. Some structural improvements were proposed aiming at avoiding those issues. Finally it is proved that a more reasonable structure was achieved. The calculation based on mechanics of materials was carried out. Based on theory of mechanics of materials, with some hypothesis on the whole structure, the tank truck model was established as typical simply supported beams and the maximum stress was attained. Compared with the results of finite element analysis, it is found that the error is only 5.3%. So it is proved that the feasibility of the established finite element model is correct.(3) Modal analysis was carried out on the tank truck, then natural frequency and mode of vibration for various orders were obtained. By ignoring rigid state of 1 to 6 order, orders from 7 to 10 play crucial effects on tank truck. The natural frequency and mode of vibration for other higher orders are no longer discussed. The presented analysis provides a basis for preventing resonance caused by stimulation such as engine, transmission shaft and road, resulting in improved stability and security.