A Topology Optimized Design Method for High-performance Structures with Fluid-thermal-mechanics Coupling
The rapid advancement of topology optimization and additive manufacturing technology provided efficient methods for designing and manufacturing high-performance complex equipment.However,current topology optimization techniques for high-performance structures only considered the design of thermal-mechanics coupling or fluid-thermal coupling,and were mostly limited to simple structures.The design under the combined effects of fluid-thermal-mechanics fields was not consid-ered,which restricted the enhancement of structural performance.This paper tackled the challenge of designing high-performance complex structures under multi-physics fields,encompassing fluid-ther-mal-mechanics interactions.A topology optimization method was proposed to enhance the ability to withstand temperature of intricate structures.Firstly,the governing equations of flow field,tempera-ture field and structural displacement field were introduced to provide a unified description of the flu-id-solid materials within the computational domain.Secondly,the topology optimization model was formulated with fluid-thermal-mechanics coupling.The objective function was set to minimize the av-erage temperature,while flow energy dissipation and structural compliance served as constraint func-tions.Sensitivity analysis of design variables was carried out by using a combination of the variational method and Lagrangian function.Finally,the established topology optimization model was applied to the structural design of a turbine,resulting in a structure suitable for additive manufacturing with ex-cellent heat dissipation performance and well-balanced flow channel distribution.
topology optimizationvariable density methodmultiphysics fieldhigh-performance structure
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