Integrated Optimum Design of Mechanism-Structure for the Pitch Mechanism of Bucket-Wheel Stacker-Reclaimer
With the aim of solving the optimization problem that only considers a single element of mechanism or structure in the traditional design of construction machinery,a lightweight design method that integrates consideration of mechanism and struc-ture is proposed.The kinematic and static analyses are performed on the pitching mechanism of the bucket wheel stacker,suitable design variables and constraints are selected,and an optimization model is established with the minimum total weight of the pitching mechanism as the objective function.Considering that profiles are often used as the main support parts in construction machinery,the continuous step function of the mapping relationship between discrete profile variables and continuous variables is constructed.The total mass of the pitching mechanism is obviously reduced after optimization,and the comparison analysis of the pitching mechanism before and after optimization is carried out.The results demonstrate that the constructed function not only has the effect of filtering the results of continuous variables,but also achieves the effect of continuousization of discrete variables of the function.The total mass of the pitching mechanism,the counterweight,the angular acceleration of the bucket wheel,the driv-ing force of the hydraulic cylinder and the force of each rod were all optimized after the optimization.
Bucket-Wheel Stacker-ReclaimerMechanismStructureOptimizationLightweightStep Function
NETL
NSTL
万方数据
维普
