摘要
Abstract
In view of the lightweight needs of a certain type of aircraft gun's firepower carrier and the current situation that the current multi-operating condition topology optimization model fails to fully consider the connection relationship,resulting in insufficient simulation accuracy,the overall technical plan of"finite element modeling+topology optimization+reliability verification"Conduct design research on aircraft gun.First,a small-scale structured grid is divided,and connection relationships such as binding and contact are fully considered,and a high-precision finite element model is established and simulation calculations are carried out as the basis for topology optimization;then,after the original plan is thoroughly explored,the variable density method is used to combine the structural stress.situation,carry out single working condition topology optimization of the cradle and multiple working conditions topology optimization of the cradle;Finally,a new configuration is obtained through iterative design,the strength reliability under the single-shot firing load is evaluated,and the multi-working condition topology optimization design and verification of the artillery fire carrier body are completed.The research results show that after multi-working condition topology optimization design and simulation,the weight reduction of the fire carrier body is achieved by more than 30%,the maximum stress is still located in the cradle,with the maximum value of 292 MPa,and the strength safety factor is still large,achieving lightweighting and firing stability.Basically unchanged.The high-precision topology optimization model designed and established by this technical scheme is mobile and can be applied to structural lightweight research of various artillery equipment.关键词
有限元/拓扑优化/承载架体/多工况航炮轻量化/高精度Key words
finite element/topology optimization/load-bearing frame/multi-operating condition aircraft gun lightweight/high precision分类
机械制造
