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Efficient aero-structural design optimization: Coupling based on reverse iteration of structural model

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Abstract

Traditional coupled multi-disciplinary design optimization based on computational fluid dynamics/computational structure dynamics (CFD/CSD) aims to optimize the jig shape of aircraft, and general multi-disciplinary design optimization methodology is adopted. No special consideration is given to the aircraft itself during the optimization. The main drawback of these methodologies is the huge expanse and the low efficiency. To solve this problem, we put forward to optimize the cruise shape directly based on the fact that the cruise shape can be transformed into jig shape, and a methodology named reverse iteration of structural model (RISM) is proposed to get the aero-structural performance of cruise shape. The main advantage of RISM is that the efficiency can be improved by at least four times compared with loosely-coupled aeroelastic analysis and it maintains almost the same fidelity of loosely-coupled aeroelastic analysis. An optimization framework based on RISM is proposed. The aerodynamic and structural performances can be optimized simultaneously in this framework, so it may lead to the true optimal solution. The aerodynamic performance was predicted by N-S solver in this paper. Test shows that RISM predicts the aerodynamic and structural performances very well. A wing-body configuration was optimized by the proposed optimization framework. The drag and weight of the aircraft are decreased after optimization, which shows the effectiveness of the proposed framework.

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Authors and Affiliations

  1. National Key Laboratory of Aerodynamic Design and Research, Northwestern Polytechnical University, Xi’ an, 710072, China

    YingTao Zuo & ZhengHong Gao

  2. State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’ an Jiaotong University, Xi’ an, 710049, China

    Gang Chen & YueMing Li

  3. Shanghai Electro-Mechanical Engineering Institute, Shanghai, 201109, China

    XiaoPeng Wang

Authors
  1. YingTao Zuo
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  2. ZhengHong Gao
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  3. Gang Chen
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  4. XiaoPeng Wang
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  5. YueMing Li
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Correspondence to Gang Chen.

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Zuo, Y., Gao, Z., Chen, G. et al. Efficient aero-structural design optimization: Coupling based on reverse iteration of structural model. Sci. China Technol. Sci. 58, 307–315 (2015). https://doi.org/10.1007/s11431-014-5744-5

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  • DOI: https://doi.org/10.1007/s11431-014-5744-5

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