Lightweight design of flywheel hub structure for aviation heavy fuel piston engine based on multi objective optimization

DOI:	10.11809/bqzbgcxb2024.11.026
Keywords:	dual mass flywheel; flywheel hub; response surface; multi objective optimization; lightweight
Abstract:	The objective of this study is to propose a multi objective joint optimization method for response surface methodology, which addresses the issue of frequent fatigue or fractures in the flywheel hub of heavy fuel piston aviation engines during actual operation.A finite element simulation calculation model of the flywheel hub is established.Taking the structural parameters of the flywheel hub as design variables and mass and fatigue life as optimization objectives, sensitivity analysis of structural parameters is carried out to determine the optimization parameters.Based on the fitting accuracy evaluation between Kriging response surface model and non parametric regression response surface model, an appropriate response surface model for subsequent multi objective optimization is determined.Through multi objective optimization, a Pareto solution set consisting of 1403 solutions is obtained.The optimal solution from this set is selected and verified by finite element simulation calculation.The results demonstrate approximately 3.3% reduction in flywheel hub mass, an improvement in fatigue life by approximately 87.5%, a decrease in maximum Von Mises stress by around 5.4%, and roughly a 2.1% reduction in maximum total deformation can be achieved using our proposed optimization method while ensuring safety of the hub structure effectively.This research provides valuable insights for optimizing related structures with enhanced lightweightness without compromising safety.
Published:	2024-11-30
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