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Advanced Aerostructural Optimization Techniques for Aircraft Design

机译：飞机设计的先进航空结构优化技术

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摘要

Traditional coupled aerostructural design optimization (ASDO) of aircraft based on high-fidelity models is computationally expensive and inefficient. To improve the efficiency, the key is to predict aerostructural performance of the aircraft efficiently. The cruise shape of the aircraft is parameterized and optimized in this paper, and a methodology named reverse iteration of structural model (RISM) is adopted to get the aerostructural performance of cruise shape efficiently. A new mathematical explanation of RISM is presented in this paper. The efficiency of RISM can be improved by four times compared with traditional static aeroelastic analysis. General purpose computing on graphical processing units (GPGPU) is adopted to accelerate the RISM further, and GPU-accelerated RISM is constructed. The efficiency of GPU-accelerated RISM can be raised by about 239 times compared with that of the loosely coupled aeroelastic analysis. Test shows that the fidelity of GPU-accelerated RISM is high enough for optimization. Optimization framework based on Kriging model is constructed. The efficiency of the proposed optimization system can be improved greatly with the aid of GPU-accelerated RISM. An unmanned aerial vehicle (UAV) is optimized using this framework and the range is improved by 4.67% after optimization, which shows effectiveness and efficiency of this framework.
机译：基于高保真模型的传统飞机耦合航空结构优化设计（ASDO）在计算上昂贵且效率低下。为了提高效率，关键是有效地预测飞机的航空性能。对飞机的巡航形状进行了参数化和优化，并采用一种称为结构模型逆向迭代（RISM）的方法来有效地获得巡航形状的航空结构性能。本文提出了一种新的RISM数学解释。与传统的静态气动弹性分析相比，RISM的效率可以提高四倍。采用通用图形处理单元（GPGPU）计算来进一步加速RISM，并构建了GPU加速的RISM。与松耦合气动弹性分析相比，GPU加速的RISM的效率可以提高239倍。测试表明，GPU加速的RISM的保真度足以进行优化。构建了基于克里格模型的优化框架。借助GPU加速的RISM，可以大大提高所提出的优化系统的效率。利用该框架对无人机进行了优化，优化后射程提高了4.67％，显示了该框架的有效性和效率。

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  • 来源
    《Mathematical Problems in Engineering》 |2015年第20期|753042.1-753042.12|共12页
  • 作者

    Zuo Yingtao; Chen Pingjian; Fu Lin; Gao Zhenghong; Chen Gang;

  • 作者单位

    Northwestern Polytech Univ, Natl Key Lab Aerodynam Design & Res, Xian 710072, Shaanxi, Peoples R China;

    AVIC China Helicopter Res & Dev Inst, Jingdezhen 333001, Jiangxi, Peoples R China;

    Northwestern Polytech Univ, Natl Key Lab Aerodynam Design & Res, Xian 710072, Shaanxi, Peoples R China;

    Northwestern Polytech Univ, Natl Key Lab Aerodynam Design & Res, Xian 710072, Shaanxi, Peoples R China;

    Xi An Jiao Tong Univ, State Key Lab Strength & Vibrat Mech Struct, Xian 710049, Shaanxi, Peoples R China;

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