Optimization Design Of Diaphragm Pump Base Structure Based On Multi-objective Optimization Algorithm

With the rapid development of modern science and technology,people ’s demand for green and low-carbon manufacturing is increasing,and the demand for mechanical product design of diaphragm pump is also increasing.Under the condition of ensuring reasonable strength and stiffness and good assembly with other parts,it is of great significance to optimize the design of diaphragm pump base.In this paper,a certain type of diaphragm pump base is taken as the research object.The influence of the load on the structure in the actual working environment is considered,and the structure of the diaphragm pump base is optimized.The temperature change analysis of the base plate structure of the diaphragm pump base is given,and the constraint conditions are given.The optimization problem formulation with strain energy as the target is obtained.The variational method is used to optimize the base plate,and the Lagrangian multiplier is introduced to construct the augmented function.The influence of four-sided simple support and one-sided free and three-sided simple support on the optimization effect of floor structure is considered.It is found that the optimization method has good vibration reduction effect,and under the same structure,the vibration reduction effect of different constraints is different,and the optimized shape is not the same.The BP neural network algorithm and multiple linear regression method were used to fit the sample set respectively,and the relationship between the four parameters of the bottom plate thickness,the number of guide plate brackets,the wall thickness of a single guide plate,and the length of a single guide plate and the maximum stress,maximum deformation,and quality was obtained.Combining the three evaluation indexes of MSE,RMSE and Euclidean distance,the objective function fitted by a method with better effect is selected.The genetic algorithm is used to optimize the fitted multiple objective functions.Considering the weights between the analysis objectives,the results are screened and analyzed many times.It is found that the optimized model reduces the maximum stress and maximum deformation while reducing the weight,and the optimization effect is remarkable.The research results of this paper provide a new optimization method for the optimization design of the diaphragm pump base structure,and provide basic support for the finite element analysis and optimization design of the new diaphragm pump structure.