Article
Engineering, Multidisciplinary
Kai Wang, Zhong-Hua Han, Ke-Shi Zhang, Wen-Ping Song
Summary: Handling a large number of geometric constraints poses a significant challenge for surrogate-based aerodynamic shape optimization (ASO) driven by computational fluid dynamics (CFD). This article proposes an efficient method that uses the Kreisselmeier-Steinhauser (KS) method to aggregate all geometric constraints into one that can be approximated by a cheap surrogate model, improving the optimization efficiency of ASO. Results show that the proposed method has the potential to handle a larger number and more types of geometric constraints, offering great potential for enhancing the optimization process.
ENGINEERING APPLICATIONS OF COMPUTATIONAL FLUID MECHANICS
(2023)
Article
Computer Science, Interdisciplinary Applications
Fanwei Kong, Shawn C. Shadden
Summary: Patient-specific cardiac modeling using deep learning methods can efficiently generate accurate and consistent simulation-suitable models of the heart from medical images. This approach outperforms prior methods in terms of whole heart reconstruction and produces geometries that better satisfy requirements for cardiac flow simulations. The source code and pretrained networks for this method are publicly available for further development and application.
IEEE TRANSACTIONS ON MEDICAL IMAGING
(2023)
Article
Computer Science, Interdisciplinary Applications
Chenliang Zhang, Yanhui Duan, Hongbo Chen, Jinxing Lin, Xiaoyu Xu, Guangxue Wang, Shenshen Liu
Summary: This paper introduces an efficient aerodynamic shape optimization (ASO) method with the metric-based Proper orthogonal decomposition (POD) parameterization method. The efficiency of the ASO method is improved through reduced design variables and narrowed design space, benefiting from the metric-based POD parameterization method. Additionally, the parameterization method is modified to be suitable for more types of objective functions by introducing a data-based filtering strategy. The efficiency and effectiveness of the optimization method are validated through two typical cases: inverse and direct design for airfoil.
STRUCTURAL AND MULTIDISCIPLINARY OPTIMIZATION
(2023)
Article
Engineering, Aerospace
Laurence J. J. Kedward, Christian B. B. Allen, Daniel J. J. Poole, Thomas C. S. Rendall
Summary: This study proposes a new generic methodology for generating orthogonal shape modes based on a purely geometric derivation, eliminating the need for geometric training data. The method shows superior performance and convergence rate in optimization processes, and can be applied to arbitrary topologies.
Article
Engineering, Aerospace
Kai Wang, Zhonghua Han, Keshi Zhang, Wenping Song
Summary: Most existing aerodynamic shape optimization (ASO) studies do not consider the balanced pitching moment, leading to a need for additional trimming and reduced benefits of ASO. This article proposes an efficient global ASO method that enforces a zero pitching moment constraint. The effectiveness of the method is demonstrated through two design optimization strategies for the NASA Common Research Model (CRM) wing-body-tail configuration.
Article
Mathematics
Fan Cao, Zhili Tang, Caicheng Zhu, Xin Zhao
Summary: The paper introduces a bilayer parallel hybrid algorithm framework for aerodynamic shape optimization, including MOHA and GS-MOHA algorithms. MOHA accelerates the exploration of the Pareto front by proposing a new multi-objective gradient operator and achieves a trade-off between exploitation and exploration by selecting elite individuals in the local search space. GS-MOHA improves the engineering applicability of MOHA by using the gradient-enhanced Kriging with the partial least squares (GEKPLS) approach.
Article
Engineering, Aerospace
Fan Yang, Zhaolin Chen
Summary: The study focuses on an adaptive surrogate algorithm for airfoil aerodynamic optimization, which integrates metamodels, active learning, and multi-objective optimization algorithms to effectively obtain optimal airfoil shapes. This approach reduces overall design costs and improves design efficiency for engineering applications.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART G-JOURNAL OF AEROSPACE ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
Lei Huang, Hongqing Li, Kaiwei Zheng, Kuo Tian, Bo Wang
Summary: This article proposes a shape optimization method for axisymmetric disks based on radial basis function (RBF) mesh deformation and Laplace smoothing approaches. The method uses a greedy algorithm to obtain an optimized reduced control point selection of mesh deformation under the influence of the design space. RBF mesh deformation is used to change the axisymmetric contour shape, and Laplace smoothing is employed to monitor and improve the local mesh quality. The proposed method is validated through two examples in aero-engines, demonstrating its significant potential in reducing the maximum equivalent stress of axisymmetric disks.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Engineering, Aerospace
Elisa Morales, Andrea Bornaccioni, Domenico Quagliarella, Renato Tognaccini
Summary: A robust optimization approach based on conditional value at risk function is presented and applied to a robust transonic aerodynamic design problem in the central section of a Blended Wing-Body configuration. The risk function focuses on aerodynamic characteristics of the airfoil, with computational cost reduction techniques introduced to minimize the costly computation of conditional value at risk.
AEROSPACE SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Aerospace
Kuo Tian, Tianhe Gao, Lei Huang, Qiushi Xia
Summary: This paper proposes an easy-to-implement data-driven non-intrusive shape-topology optimization framework for curved shells, which includes an offline step and an online step. In the offline step, Latin hypercube sampling is used to generate input data, and a shape equation-driven mesh deformation method is used to obtain the skin shape of the curved shell. In each design domain determined by different skin shapes, topology optimizations are performed, and the results are collected in the output dataset. In the online step, single-loop data-driven optimization is carried out using covariance matrix adaptive evolution strategy and adaptive optimization updating method for efficient optimization results.
AEROSPACE SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Aerospace
Baigang Mi, Shixin Cheng, Yu Luo, Huayu Fan
Summary: A new many-objective aerodynamic optimization method is proposed to design a distinctive symmetrical elliptic airfoil, which can significantly reduce drag and improve the drag divergence Mach number. The optimization results demonstrate its practical significance in the development of canard rotor wing aircraft.
AEROSPACE SCIENCE AND TECHNOLOGY
(2022)
Article
Mechanics
Jinhua Lou, Rongqian Chen, Jiaqi Liu, Yue Bao, Yancheng You, Zhengwu Chen
Summary: This paper proposes a method for the aerodynamic optimization of airfoils based on a combination of deep learning and reinforcement learning. The results show that the proposed method can improve the lift-drag ratio of the airfoil to 71.46%.
Article
Computer Science, Software Engineering
Kunyao Chen, Fei Yin, Bang Du, Baichuan Wu, Truong Q. Nguyen
Summary: In this article, a novel two-step solution combining isometric deformation and cluster-based regularization is proposed to address the problems in traditional mesh alignment methods. Extensive experiments demonstrate the effectiveness of the method for large-scale deformation and imperfect data.
IEEE TRANSACTIONS ON VISUALIZATION AND COMPUTER GRAPHICS
(2023)
Article
Engineering, Aerospace
Yanxuan Zhao, Chengwen Zhong, Fang Wang, Yueqing Wang
Summary: This paper proposes a novel neural network model for predicting aerodynamic forces, and improves the explainability of the model by introducing circular padding and displaying saliency maps.
INTERNATIONAL JOURNAL OF AEROSPACE ENGINEERING
(2022)
Article
Engineering, Aerospace
Jichao Li, Sicheng He, Joaquim R. R. A. Martins, Mengqi Zhang, Boo Cheong Khoo
Summary: This article discusses the importance of physics-based data-driven modeling in practical aerodynamic shape optimization. It proposes a feature-oriented model that learns fundamental physical mechanisms from high-dimensional data, greatly improving generalizability. The article also introduces a Bayesian-optimization-based sampling method to prioritize samples with good aerodynamic performance, significantly reducing the training data volume. The effectiveness of these methods is demonstrated in two optimization cases.