Power System Design And Frame Assembly Structure Research For Heavy-load Electric Tractor Of The Port

With the development of economic globalization,the logistics industry has gradually raised,which introduce the increase of transportation volume of the ports and the wharves.Refer to its simple,convenient and fast merits,the transport of a container tractor has become the principle transportation tool on the platforms.On the other hand,the human beings is facing great challenges from energy shortage and environment destroy in the 21 st century,which has promoted the development from traditional trucks to a more efficient and low-emission electric vehicles.Therefore,the port container tractor,as an important transport machinery of the port,is a necessary trend of the power sources reform.This paper studies the related technology of heavy-duty electric container tractor with load of 60 T.Firstly,according to the requirements of the use in the port,a "6 × 4" heavy-duty tractor model is selected as the object of study,the scheme of electric drive design is analyzed,and the models of the power system is matched and designed,and the vehicle performance(such as climb slope,acceleration,energy consumption per 100 km,etc.)is simulated and verified based on AVL CRUISE software.Besides,aiming to the problem of break and large deformation of heavy-load electric container tractor frame when driving on poor road in the port,and based on the force distribution of frame structure and the change of axle load because of the difference between electric tractor and traditional tractor power system,the frame assembly structure and dynamic loads under various working conditions are analyzed.And SolidWorks is used to design and model the frame assembly.And Workbench is applied as the finite element analysis(FEA)tool to analyze the strength of the frame assembly under bending conditions,bending and twisting conditions,emergency braking and emergency turning conditions,as well as the frame assembly modal analysis.Finally,the combination of empirical design and structural parametric design is applied to develop the frame structure,which result in a significant optimized effect.This topic focuses on the overall design,analysis and optimization of the frame assembly structure.Nonlinear contact algorithm,optimal Latin hypercube sampling method and Multi-Objective Genetic Algorithm are applied to analyze and optimize the frame structure.The research of this subject has reference significance for other frame structure design optimization.