کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5472724 1520065 2017 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Free vibration analysis of deep doubly curved open shells using the Ritz method
ترجمه فارسی عنوان
تجزیه و تحلیل ارتعاش آزاد پوسته عمیق دو طرفه منحنی با استفاده از روش ریتز
کلمات کلیدی
ارتعاش آزاد، پوسته های عمیق، تقریبا منحنی، روش ریتز،
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی هوافضا
چکیده انگلیسی
This paper develops a unified semi-analytical method for the free vibration analysis of moderately thick doubly curved open shells with arbitrary geometry and classic boundary conditions. The only restriction on the shell's geometry is that boundaries are being coincided by the principal curvature lines of the shell. The formulation is based on the first order shear deformation theory by considering effects of curvature in the evaluation of stress resultants. Differential geometry method is used to represent the arbitrary shape of the middle surface of the shell. The Ritz method with algebraic polynomials as trial functions is employed to obtain the natural frequencies and mode shapes of the shell. To demonstrate the efficiency and accuracy of the solution, convergence and comparison studies are carried out for a cantilevered shallow shell and a parabolic panel. Furthermore, a variety of new vibration results including frequencies and mode shapes of ellipsoid and Enneper panels with various boundary conditions are presented which may be used as benchmark results for future studies.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Aerospace Science and Technology - Volume 69, October 2017, Pages 136-148
نویسندگان
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