Multi-Objective Optimization Design Method for a Irregular Bracket Structure
In aeroengine lubricating oil tank adopted when installed on the casing as the typical representative of stents,forms of special shape bracket with complex structure,with relatively high stiffness and light quality,therefore,this paper established a comprehensive orthogonal test method,the finite element analysis method,the neural network fitting method with the combina-tion of a structural dynamics optimization design method,It has high optimization design efficiency for the structure with com-plex structure.Using the orthogonal test method,the solution set of the components is reasonably selected in the feasible domain of the design variables of the scaffold sample model,so that the solution set can fully reflect the relationship between the optimized objective variables and the design variables.Using the finite element parameterized simulation method,the selected sample model was simulated by parameterized calculation,and the optimized target variable value of each sample model in the solution set was obtained.Based on the neural network fitting method and the data obtained from the parametric simulation,the mathematical model between the design variables and the optimization objective variables was constructed,and the multi-objective optimization algorithm NSGA-Ⅱwas used for iterative solution,and the final optimization design result was obtained.The relative change rate of natural frequencies of the optimized samples and the initial samples is basically consistent with the simulation value,which can verify the accuracy and effectiveness of the multi-objective optimization design method of the scaffold structure.
Attachments Installation StructureOrthogonal Test MethodMulti-Objective Optimization DesignFinite Element Analysis
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维普
