Surrogate based blended-wing-body underwater glider shape optimization design

• Format: Article
• Language: zho
• Published: The Northwestern Polytechnical University 2021-02-01
• Series: Xibei Gongye Daxue Xuebao
• Subjects: underwater glider; blended wing body; surrogate model; shape optimization design; lift to drag ratio
• Online Access: https://www.jnwpu.org/articles/jnwpu/full_html/2021/01/jnwpu2021391p85/jnwpu2021391p85.html

In order to improve the design quality and optimization efficiency for blended-wing-body underwater glider(BWBUG) shape design optimization problems, a surrogate-based blended-wing-body underwater glider shape optimization(SBUGSO) framework is proposed. The aim is to maximize the lift to drag ratio(LDR) of BWBUG with the constrain that the displacement volume of the optimal shape is larger than that of the initial shape. The LDR of the optimal BWBUG is improved by 24.32% with acceptable computational resources. The optimization results show that the present SBUGSO framework can efficiently decrease the computational resource, and improve the hydrodynamic performance and loading capacity of BWBUG. Comparing with the other optimization algorithms, SBUGSO framework shows the significant superiority.