Research On Topology Optimization Method Of Turbine Disk Structure Based On BESO Algorithm

With the rapid development of the industry,more and more scholars pay attention to my country’s aviation cause,and aerospace engine as the "heart" of the airline,the quality of structural performance has played a decisive role in the operational efficiency of the entire aircraft.In addition,considering that the turbine disk structure is one of the core components of the aerospace engine,and the lightweight design of the turbine disk structure can effectively improve the productivity of the aviation engine and its heat dissipation performance,so the optimization design of the turbine disk structure is particularly important.However,in terms of researches on the structural optimization techniques of aerospace engine turbine plates at present,most of them are limited to shape and size optimization levels,and the effects of temperature on the optimization design of the turbine disk are ignored.Therefore,in order to overcome the above problems,it is urgent to do some research about topology optimization techniques of the turbine disk structure,and focus on the method of structural topology optimization design under thermal coupling effect.This study is mainly surrounding the topology of the turbine disk structure,the topology optimization method of the maximum overall stiffness based on the BESO algorithm is used,and the calculative results of topology optimization design examples about plane and spatial structure under different working conditions are analyzed,the topology optimization design method of the turbine disk structure was finally proposed.This dissertation has carried out and completed the following research works.(1)The optimization model under centrifugal load and thermal load conditions is constructed,and the topological optimization problems about two-dimensional cantilever beams with centrifugal load and square plates with thermal load are optimized,and an optimization model under the centrifugal load and thermal load is built.Subsequently,the written algorithm code is extended to the turbine disk structure,and the topology optimization design of the turbine disk plane structure is achieved,and a radial structure is obtained.(2)The turbine disk spatial structural topology optimization method under thermalmechanical coupling is proposed,and the physical model and mathematical model of the turbine disk spatial structure is constructed.Subsequently,the parameter analysis of the turbine disk’s topology optimization was carried out,and the effects of different optimized parameters on the structural optimization results were discussed.In addition,the results of the finite element analysis between the optimized turbine disk and the unoptimized one is compared,and it’s found that the optimized turbine disk volume not only decreased by30%,but the Von Mises stress and strain capacity of the structure were more uniform,and the structure stiffness also increased.(3)A program of structural topology optimization for the turbine disk is developed,and the turbine disk’s analysis model is established by taking advantage of the method of APDL language parameterized variable.At the same time,relying on the user graphic interface design with UIDL,the program of menu interface of structural topology optimization for the turbine disk is implemented.