Abstract




 
   

IJE TRANSACTIONS C: Aspects Vol. 31, No. 9 (September 2018) 1593-1601    Article in Press

PDF URL: http://www.ije.ir/Vol31/No9/C/16-2901.pdf  
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  AUTONOMOUS UNDERWATER VEHICLE HULL GEOMETRY OPTIMIZATION USING A MULTI-OBJECTIVE ALGORITHM APPROACH
 
S. Abbasi, M. Zeinali and P. Nejadabbasi
 
( Received: November 11, 2017 – Accepted in Revised Form: February 23, 2018 )
 
 

Abstract    In this paper, a new approach to optimize an Autonomous Underwater Vehicle (AUV) hull geometry is presented. Using this methode, the nose and tail of an underwater vehicle are designed, such that their length constraints due to the arrangement of different components in the AUV body are properly addressed. In the current study, an optimal design for the body profile of a torpedo-shaped AUV is conducted, and a multi-objective optimization scheme based on the optimization algorithm Non-dominated Sorting Genetic Algorithm-II (NSGA-II), as an evolutionary algorithm is employed. In addition, predefined geometrical constraints were considered so that equipment with the specific dimensions can be placed inside the AUV space without any effect on the AUV volume and the wetted surface. By optimizing the parameters of the newly presented profile, in addition to maximizing the volume and minimizing the wetted surface area, more diversed shapes can be achieved than with the ‘Myring’ profile. A CFD analysis of the final optimal design indicates that with the help of the proposed profile, the hydrodynamic parameters for the AUV hull were effectively improved.

 

Keywords    Autonomous Underwater Vehicles, Hull Shape Design, Multi-objective Optimization

 

چکیده   

در مقاله حاضر یک روش جدید برای بهینه‌سازی هندسه بدنه یک وسیله زیرسطحی خودکنترل ارائه شده است. به کمک این روش دماغه و دم وسیله زیرسطحی به گونه‌ای طراحی می‌شود که قیود طولی ناشی از جانمایی اجزاء متفاوت در داخل بدنه مورد ملاحظه قرار گیرد. در پژوهش حاضر یک طراحی بهینه برای بدنه وسیله زیرسطحی اژدری شکل انجام شده است و روش بهینه‌سازی چند هدفه بر مبنای الگوریتم بهینه‌سازیNSGA-II به کار گرفته شده است با بهینه کردن پارامترهای هندسی پروفیل جدید به کارگرفته شده، علاوه بر ماکزیمم کردن حجم بدنه می‌توان به سطح تر شده کمتری دست یافت. ضمن آنکه در مقایسه با پروفیل متداول مایربنگ می‌توان به تنوعی از شکل‌های بدنه در یک شرایط هندسی خاص دست یافت. شبیه‌سازی عددی جریان در طرح بهینه نهایی نشان می‌دهد که به کمک پروفیل به کارگرفته شده پارامترهای هیدرودینامیکی بدنه زیرسطحی خودکنترل به طور موثری بهبود می‌یابد.

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