Multi-objective Optimization Of Handling Stability And Ride Comfort Of HKC190 Mining Dump Truck

Mining dump truck is a transportation facility with very bad operating environment and intricate impact of external loads.For the mining dump truck,running in this state has high requirements on its safety and reliability,and also has adverse effects on its handling stability and riding comfort.By improving these two properties of the dumper,the movement performance can be effectively improved and the occurrence of safety accidents can be reduced.This paper takes the HKC190 mining dump truck as the research object.Through multi-objective optimization,the vehicle's handling stability and riding comfort are improved as a whole,avoiding the one-sidedness of the research,which has certain theoretical research significance and engineering reference value.In this paper,the dynamic software ADAMS/Car is used to build a multi-rigid-body dynamic model on the basis of the three-dimensional model.The simulation of the dumper's handling stability and riding comfort is carried out.The hardpoint parameters of the suspension structure are used as design variables.Combined with the response surface method(RSM)and D-optimal design method,the multi-objective optimization of the mining dump truck's performance was carried out to improve it to a certain extent.First of all,in order to better highlight the impact of suspension hardpoint optimization on the performance improvement of the vehicle,the stiffness and damping characteristics of the front and rear suspension were designed to match on the premise of maintaining good ride comfort and handling stability.Combined with the multi-body dynamics theory and finite element method,the multi-body dynamics model of the vehicle was established.Secondly,by analyzing the actual working conditions of mining dump trucks,Constant-Radius Cornering test,Cornering w/Steer Release test,and Fish-Hook test are used as the main test methods for evaluating the handling stability.Because the riding comfort of trucks under no-load conditions is weaker than that under full load,Stability Random Input test,Pulse test and Straight-line Braking test under no-load conditions are used as the main test methods to evaluate the ride comfort of the vehicle.Calculate and process the results after the experimental simulation to obtain various evaluation scores of the vehicle performance.Then,combining the TOPSIS comprehensive contribution coefficient calculation method and the entropy weight method,the comprehensive contribution coefficient of each design variable for each suspension performance index is calculated.According to the ranking of the comprehensive contribution coefficient,the design parameters with greater influence are determined.Finally,the response surface method was used to obtain the polynomial fitting model of the mining dump truck,and the optimal solution of the model was calculated using the ADAMS / Insight optimization tool.The simulation results before and after optimization were compared and analyzed.