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Structural topology optimization considering frequency response subject to harmonic base excitations |
Received:January 17, 2024 Revised:March 01, 2024 |
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DOI:10.7511/jslx20240117001 |
KeyWord:harmonic base excitation topology optimization frequency response amplitude sensitivity analysis Generalized Modal Truncation Augmentation Method(GMTAM) |
Author | Institution |
周大为 |
大连理工大学 工业装备结构分析优化与CAE软件国家重点实验室 工程力学系, 大连 |
张盛 |
大连理工大学 工业装备结构分析优化与CAE软件国家重点实验室 工程力学系, 大连 |
陈飙松 |
大连理工大学 工业装备结构分析优化与CAE软件国家重点实验室 工程力学系, 大连 |
李云鹏 |
大连理工大学 工业装备结构分析优化与CAE软件国家重点实验室 工程力学系, 大连 |
周昳鸣 |
中国华能集团清洁能源技术研究院有限公司, 北京 |
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Abstract: |
This study investigated dynamic topology optimization under harmonic base excitations.The dynamic control equation under harmonic base excitations was derived.Within the framework of the artificial variable density method,the sensitivity analysis of the steady-state frequency response amplitude at a designated position in the structure was formulated using the adjoint method.The RAMP model was adopted to suppress localized mode issues.For the purpose of reducing computational costs without compromising accuracy,the Generalized Modal Truncation Augmentation Method(GMTAM)was introduced in the analysis process of structure responses and sensitivities.Numerical examples first validated the correctness of the derived sensitivity analysis formulation.Topology optimization under both uniform and non-uniform base excitations was then considered,and the topology optimization model was also discussed.The optimization results verified the effectiveness of the proposed method. |