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| Topology optimization method for structural configuration design containing heterogeneous outer surface layers |
| Received:June 18, 2023 Revised:July 28, 2023 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20230618001 |
| KeyWord:structures with heterogeneous surface layer topology optimization surface layer identification and description virtual temperature method |
| Author | Institution |
| 李冉 |
大连理工大学 工程力学系 工业装备结构分析优化与CAE软件全国重点实验室, 大连 |
| 胡靖宇 |
大连理工大学 工程力学系 工业装备结构分析优化与CAE软件全国重点实验室, 大连 |
| 刘书田 |
大连理工大学 工程力学系 工业装备结构分析优化与CAE软件全国重点实验室, 大连 |
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| Abstract: |
| The harsh service environment requires the heterogeneous surface layer structure to meet the specific function while exhibiting lightweight characteristics.In other words,the outer surface of the structure can not be used as only a functional layer.It must also be involved in load transfer.Its influence should be considered when designing the structure.This paper proposes a topology optimization method for structural configuration design containing heterogeneous outer surface layers.Firstly,a structural surface layer modeling technique based on an erosion algorithm is used to construct an equivalent model of the heterogeneous surface layer structure through smooth filtering and discrete projecting.Second,the open/closed holes in the structure are identified by the nonlinear virtual temperature method,and based on this,the outer surface layer of the structure exposed to the working environment and the inner surface layer of the structure attached to the enclosed holes are distinguished.Finally,a topology optimization model for structures with heterogeneous outer surface layers is developed,and the sensitivity information of the objective function concerning the design variables is derived.Several numerical examples verify the effectiveness of the proposed method. |