Structural Design And Optimization For Rear Axle Housing Of 300-Ton Mining Dump Truck

At present,the mining dump truck load capacity is widely attention due to the strong loading capacity.In domestic,the sales are increasing steadily year after year.The 300-ton mining dump truck can be manufactured by using domestic technology.The drive axle of the mining dump truck is one of the key components.The withstand load is its main function.The torque from the engine is transmitted to the drive wheels.The rear axle has great significance for the safety and performance of the truck.The rear axle housing is the loading component in the driving for the mining dump truck.It has an important effect on the safety and reliability of the truck.In the past,the structural design of the rear axle housing is done based on the manual and experience.Due to the complexity conditions,the design cannot be verified by using the classical mechanics.Normally,the conservative design can make the products heavy and unreasonable.Based on the parameters and working conditions of the 300-ton mining dump truck,the structural design and research of the rear axle housing can be done on the following several aspects in the paper.Firstly,combined with many references,the basic parameters of the classical trucks are given by investigating the brand models of the mining dump trucks.Compared with the advantages and disadvantages of the type A and connecting rod suspension,the design scheme is done.And the basic parameters of suspension are also given.Secondly,due to the close connection of the frame and rear axle system,the loading of the rear axle housing is computed based on the loading of the frame.The parameters of the rear axle housing can be determined by verifying the fastening and connecting components.At the same time,the welding process is analyzed for the rear axle housing.Thirdly,the structural design of the rear axle housing has been done.The 2D drawing and the 3D model are also established.Besides,the finite element model is constructed by using the software ANSYS Workbench.In the normal and extreme conditions,the strength of the rear axle housing need be checked.Finally,based on the design of experiment(DOE)and the computational response,the surrogate model is constructed by using the Kring method.In paper,the rear axle housing can be optimized by using Multi-Island Genetic Algorithm(MIGA).In order to ensure the correctness of the optimization result,it is verified by using the Non-dominated Sorting Genetic Algorithm(NSGA-II).Compared with the original result,the optimization result is greatly improved on the weighting of the rear axle housing.