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| Topology optimization for multi-functional structure with both load-bearing and thermal insulation capability considering transient effect |
| Received:October 16, 2020 Revised:March 20, 2021 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20201016001 |
| KeyWord:thermal protection structure integration design of thermal insulation and load-bearing topology optimization transient heat conduction maximum temperature control |
| Author | Institution |
| 吴书豪 |
大连理工大学 工业装备结构分析国家重点实验室, 大连 |
| 张永存 |
大连理工大学 工业装备结构分析国家重点实验室, 大连 |
| 刘书田 |
大连理工大学 工业装备结构分析国家重点实验室, 大连 |
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| Abstract: |
| A multi-functional structure,which can meet the requirements of load-bearing and thermal insulation simultaneously,has attracted much attention in the design of hypersonic thermal protection structures.The load-bearing capacity of thermal insulation materials is weak,while the thermal insulation capacity of load-bearing materials is poor.How to balance the load-bearing and thermal insulation requirements in a limited space has become a key problem.The aerodynamic heating time of hypersonic aircraft is limited,which has the characteristics of short heating time and large variation of thermal load.Therefore,the influence of time and transient effect needs to be considered in structural design,but the existing multi-functional collaborative optimization design model of steady heat conduction and load-bearing cannot solve the above problems.In this paper,the design model and solution method of topology optimization for multi-functional structures with both load-bearing and thermal insulation capability considering transient effects are established,and the analytical sensitivity calculation format of the objective and constraints is given.Based on the density method and considering the volume constraint,this method takes the minimum structural compliance as the design objective and the regional temperature control function as the design constraint to achieve the multi-functional design requirements of structural stiffness and thermal insulation.Numerical examples show that the proposed optimization model can accurately consider the transient effect of the structure,and realize the multi-functional coordination of load-bearing and thermal insulation design under the given allowable temperature and working time. |
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