کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6915855 | 862926 | 2016 | 26 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
An efficient model reduction method for buckling analyses of thin shells based on IGA
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی کامپیوتر
نرم افزارهای علوم کامپیوتر
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: An efficient model reduction method for buckling analyses of thin shells based on IGA An efficient model reduction method for buckling analyses of thin shells based on IGA](/preview/png/6915855.png)
چکیده انگلیسی
An efficient reduced basis method is proposed for buckling analyses of thin shells subject to large deformations and strains. The thin shells are modeled with the classical Kirchhoff-Love kinematics under the framework of IGA (Isogeometric Analysis), which makes it possible to satisfy the requirement of C1 continuity. The analytically defined geometry of thin shells can be exactly represented by the NURBS (Non-Uniform Rational B-Splines) basis functions. In addition, the critical buckling point can be better pin-pointed due to the exact geometric description. For efficient structural analyses, a simplified ROM (Reduced Order Model) is presented by combining the Koiter perturbation technique and the finite element method (FEM). Alternative perturbation forces, based on nonlinear eigenvalue analyses, are also proposed. Embedding three strategies including arc-length control, accompanying eigenvalue analysis and mode injection into the analysis procedure, the proposed method is extended to be applicable to nonlinear buckling analyses. Furthermore, imperfection sensitivity analyses can be conveniently performed with the proposed method. Finally, the effectiveness and efficiency of the proposed method are validated via three benchmark problems.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computer Methods in Applied Mechanics and Engineering - Volume 309, 1 September 2016, Pages 243-268
Journal: Computer Methods in Applied Mechanics and Engineering - Volume 309, 1 September 2016, Pages 243-268
نویسندگان
Kai Luo, Cheng Liu, Qiang Tian, Haiyan Hu,