Simulation And Optimization Of Mining Dump Truck Steering Mechanism

As an important part of mining dump truck, the role of steering mechanism is used tochange or restore its traveling direction. In the steering process, as a result of the irrationaldesign of steering mechanism, it will shorten the life of the tires, cause steer difficulty or eventhe risk of skidding. Meanwhile, the load of steering mechanism is complex and changing,including the load, the constraints between the parts and the shock from the road and so on,which requires steering mechanism to be designed well in static strength, fatigue strength andreliability. This paper researched on the simulation and optimization of220t electric wheelmining dump truck steering mechanism which is based on kinematics and dynamics, finiteelement and structural optimization.Firstly, the steering motion law of mining dump truck is analyzed, and the mathematicalmodals of plane steering mechanism and space steering mechanism are established.According to the Ackermann steering principle, kinematics simulation and dynamicssimulation of steering mechanism are made by ADAMS, and the relationship between theactual internal and external angle is analyzed.Secondly, rational optimization objective functions are established, and steeringmechanism is optimized with MATLAB. Forces on parts of steering mechanism are analyzedthrough dynamics simulation. According to the optimized result, new three-dimensionalmodal of steering mechanism is established.Thirdly, strength of the tie rod is analyzed, the stress and strain of the tie rod areresearched, and the selection of material of the tie rod is analyzed. As the tie rod is slenderone withstanding axial force, there may occur the phenomenon of buckling failure, simulationand theoretical calculations are used on the stability analysis, the correctness of the result isverified by comparison of the results. Also, dynamic characteristic of the tie rod is analyzed,avoiding the phenomenon of resonance.Fourthly, strength of knuckle arm is analyzed, and the stress and strain of the tie rod areresearched. Based on the theory of topology optimization, to make a light-weight design, the topology mathematical modal of knuckle arm is established, and topology optimization ismade by ANSYS. Validity of topology optimization is verified through the comparison onstrength and stiffness between the new knuckle and the old knuckle, the selection of materialof the knuckle is also analyzed.Lastly, fatigue life of knuckle arm and tie rod are analyzed with nominal stress methodand local stress-strain method. Then fatigue simulation of knuckle arm and tie rod are madewith Fesafe. And the result is verified by comparison of results.