ارتعاشات پوسته استوانه ای دوار مدرج تابعی تحت فشار با تقویت‌کننده حلقوی و محوری

نوع مقاله : مقاله پژوهشی

نویسندگان

1 امام حسین(ع)

2 امام حسین ع

3 دانشگاه امام حسین (ع)

چکیده

در این پژوهش ارتعاشات پوسته استوانه­ای دوار با مواد مدرج تابعی، تحت فشار محوری و داخلی با تقویت­کننده حلقوی و محوری و شرایط تکیه­گاهی دو سر ساده بر اساس تئوری پوسته لاو بررسی شده است. پوسته­های استوانه­ای با تقویت­کننده حلقوی و محوری به­صورت گسترده­ای در سازه­هایی از جمله موشک­ها، زیر دریایی­ها و مخازن سوخت هواپیما مورد استفاده قرار می­گیرند. خصوصیات مکانیکی مواد مدرج تابعی پوسته استوانه­ای دوار طبق تابع توانی در جهت شعاع به­طور پیوسته تغییر می­کند. در این بررسی مواد مدرج تابعی به­کار رفته از نیکل و فولاد ضد زنگ تشکیل شده است، که نیکل در سطح داخلی و فولاد ضد زنگ در سطح خارجی پوسته قرار دارد. معادلات حاکم بر پوسته استوانه­ای با استفاده از اصل همیلتون و روش انرژی استخراج می­شود و تاثیر پارامترهای مختلف نظیر سرعت دورانی، تقویت­کننده­های حلقوی و محوری، بار محوری، فشار داخلی و خواص مواد مدرج تابعی بررسی شده است. صحت نتایج حاصل­شده با مقایسه آنها با نتایج حاصل از پژوهش­های قبلی مورد بررسی قرار گرفته و مطابقت خوبی بین کار حاضر و مطالعات پیشین دیده شده است

کلیدواژه‌ها

عنوان مقاله [English]

Vibrations of a Rotating Functionally Graded Cylindrical Shell under Pressure with Ring and Stringer Stiffened

نویسندگان [English]

  • ali mousavi 1
  • saeed mahjoob moghadas 2
  • mahmood kafash mirza rahimi 3
1 emam hosein
2 emam hosein
3 emam hosein
چکیده [English]

In the investigation, the vibrations of a rotating functionally graded cylindrical shell under axial and internal pressure with ring and stringer stiffened and simply supported boundary condition based on Love’s shell theory is studied. The material properties of the rotating functionally graded (FG) cylindrical shell vary continuously across the thickness according to the power law distribution. In this study considers functionally graded material composed of Nickel and stainless steel, in which FG cylindrical shell has Nickel on its inner surface and stainless steel on its outer surface. The governing equations of cylindrical shell are derived using Hamilton’s principle and energy method and the effect of various parameters such as angular speed, ring and stringer stiffened, axial load, internal pressure and functionally graded material is investigated. The validity of the results by comparing them with the results in previous research is investigated, in which there is very good agreement between the results of the present work and previous studies.

کلیدواژه‌ها [English]

  • Vibrations
  • Rotating cylindrical shell
  • Functionally graded material
  • Axial and internal pressure
  • Ring and stringer stiffened

مراجع

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سابقه مقاله

  • تاریخ دریافت: 04 اسفند 1397
  • تاریخ بازنگری: 04 مرداد 1398
  • تاریخ پذیرش: 16 مهر 1398
  • تاریخ انتشار: 01 دی 1398

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