نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشگاه تهران

2 عضو هیئت علمی/ دانشگاه تهران

3 دانشیار، دانشکده مهندسی مکانیک، دانشگاه تهران، تهران

4 عضو هیات علمی، دانشکده مهندسی مکانیک، دانشگاه تهران

10.22068/jstc.2022.554504.1785

چکیده

در مقاله ی حاضر، نمایه مقطع طولی و عرضی یک زیردریایی، که در عمق مشخصی قرار دارد، بر مبنای فشار هیدرودینامیک که بر بدنه زیردریایی توسط جریان سیال وارد می‌شود، از دیدگاه سازه ای و با در نظر گرفتن مقاومت کمانشی بدنه تحت فشار خارجی بهینه سازی شده است. محاسبه فشار هیدرودینامیکی با استفاده از تحلیل دینامیک سیالات محاسباتی و بهینه‌سازی هندسه بدنه با استفاده از نرم‌افزار ANSYS Workbench انجام شده است. بدنه فشار زیردریایی تقریبا بیشترین فشار را تحمل می‌کند و از این‌رو از جنس کامپوزیت پایه پلیمری در نظر گرفته شده است. با توجه به اینکه هندسه‌ی مورد مطالعه و نوع بارگذاری (بار هیدرودینامیکی) در این مقاله پیچیده است و همچنین روابط تحلیلی برای بررسی تنش در این پژوهش موجود نیست، کمانش با استفاده از محاسبات نرم‌افزاری، بدست آمده و با انجام تحلیل تنش زیردریایی با هندسه اولیه مورد نظر، نیروها و تنش‌های وارده به بدنه، محاسبه شده و از نظر هیدرودینامیکی و سازه‌ای نیز مورد مطالعه قرار گرفته‌است. با فرض 12 متغیر هندسی و کمینه کردن وزن و نیروی پسا به عنوان توابع هدف، توسط روش ‌های بهینه‌سازی، نمایه طولی و عرضی بهینه و این روند تا رسیدن به مقادیر مطلوب تکرار می‌شود. نتایج بدست آمده در این مقاله حاکی از آن است که بکارگیری اشکال غیر دایروی همچون شبه بیضی در طراحی و ساخت زیردریایی می‌تواند جایگزین مقاطع دایروی شود.

کلیدواژه‌ها

عنوان مقاله [English]

Geometrical optimization of submarine pressure hull considering one-way fluid-solid interaction

نویسندگان [English]

  • Mohsen Aligoli 1
  • Mojtaba Haghighi Yazdi 3
  • Alireza Riasi 4

1 University of Tehran

2

3 University of Tehran

4 School of Mechanical Engineering, University of Tehran

چکیده [English]

In this paper, the profile of the longitudinal and transverse sections of a submarine, which is located at a certain depth, based on the hydrodynamic pressure imposed on the submarine body by the fluid flow, from a structural point of view and considering the buckling resistance of the body under external pressure optimized. The calculation of hydrodynamic pressure has done using computational fluid dynamics analysis and body geometry optimization using ANSYS Workbench software. The pressure body of the submarine withstands almost the most pressure and hence it is considered to be made of polymer based composite material. Considering that the studied geometry and the type of loading (hydrodynamic load) in this article are complex, and analytical relationships for stress analysis are not available in this research, buckling is obtained using software calculations and by performing submarine stress analysis with the desired initial geometry, forces and stresses applied to the body have been calculated and hydrodynamically and structurally studied. Assuming 12 geometrical variables and minimizing weight and drag force as objective functions, by optimization methods, optimal longitudinal and transverse profile and this process is repeated until the desired values are reached. The results obtained in this article indicate that the use of non-circular shapes such as pseudo-ellipses in the design and construction of submarines can replace circular sections

کلیدواژه‌ها [English]

  • Optimization
  • Submarine
  • Composite
  • Hydrodynamics
  • geometrical variables
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