Multi-material And Structure Integrated Topology Optimization Algorithm For Engine Turbine Disk

As one of the core components of aero-engine,the weight and structural performance of turbine disk will greatly affect the overall performance of the engine.Therefore,how to reduce the weight and improve the performance has become one of the main tasks of aero engine turbine disk optimization design.As an advanced design method,topology optimization can find the optimal distribution of materials under the set load conditions,so as to reduce the weight and improve the performance of the structure.Therefore,the application of topology optimization to the optimization design of aero engine turbine disk has certain engineering significance.Because the working conditions of turbine disk are relatively complex,it not only has to bear its own inertial load,but also has to consider the effect of thermo solid coupling because it is in the working environment of thermal convection.In order to solve the problems in topology optimization of aero engine turbine disk,the following four aspects are studied in this paper:(1)Aiming at the topology optimization of design-dependent loads represented by inertial loads and design-dependent thermal loads,a load sensitivity suppression method is proposed in this paper.Then this method is applied to the topology optimization of the radial section of the turbine disk,and the structure and evolution curve of the single/double spokes of the turbine disk are obtained.(2)In order to solve the topology optimization problem of heat transfer structure under thermal convection boundary conditions,ajoint topology optimization algorithm based on matlab-ansys is proposed.At the same time,in order to improve the heat transfer efficiency and reduce the dissipation of heat transfer potential capacity,an ordered eamp multi material model is proposed.(3)Combined with additive manufacturing technology,an improved mixed multimaterial model is proposed in this paper.Based on this model,an integrated topology optimization model of multi material and structure is established.Then,the model is applied to the two plane design domains of turbine disk,and the topological structures of mixed multi-material turbine disk under different working conditions and loads are obtained.(4)On the basis of the above research,a multi-objective topology optimization model based on mixed multi-material is established in this paper,and the influence of load and material parameters on topology optimization structure is discussed with examples.Finally,it is applied to the turbine disk structure to calculate the optimal topology under different multi-objective weights.