Multi-scale lightweight design of precision instrument bearing plate

Abstract

In order to meet the needs of structural lightweight and mechanical performance improvement of precision instrument bearing plates for aviation parts under overload, the advantages of topology optimization and lattice optimization were integrated, and a multi-scale lightweight design method combining topology optimization and lattice optimization was proposed with the minimum flexibility of the structure as the constraint and the mass minimization as the goal. A three-level three-factor orthogonal experiment was designed for the key parameters of the grid structure, grid filling ratio and volume constraints, so that the optimized parts could achieve the lightest mass under the premise of ensuring the safety performance. The results show that the mass of the multi-scale lightweight instrument bearing plate is reduced by 85.2%, the deformation under overload is reduced by 29.07%, and the dynamic performance of the structure is improved. The multi-scale optimization design method of grid structure filling on the basis of topology optimization can reduce the mass of the optimized parts, which provides some reference for the lightweight design of load-bearing plate parts in the aviation field.

Keywords

• structure design; precision instrument bearing plate; lightweight; topology optimization; lattice optimization; multi-scale optimization