کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
667981 1458724 2015 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Hybrid uncertain analysis for temperature field prediction with random, fuzzy and interval parameters
ترجمه فارسی عنوان
تجزیه و تحلیل نامتقارن هیبرید برای پیش بینی دمای میدان با پارامترهای تصادفی، فازی و بازه
کلمات کلیدی
عدم اطمینان هیبرید، پیش بینی دما، سری نیومن، روش لحظه ای تصادفی، قضیه تجزیه فازی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
چکیده انگلیسی


• Random, fuzzy and interval parameters are considered simultaneously.
• Fuzzy parameters are decomposed to interval variables based on level-cut method.
• Perturbation theory and random interval moment method are combined.
• Membership functions are reconstructed based on fuzzy decomposition theorem.

This paper presents a hybrid uncertain finite element method (HUFEM) for the uncertain temperature field prediction involving random, fuzzy and interval parameters simultaneously in material properties, external loads and boundary conditions. Random variables are used to quantify the stochastic uncertainty with sufficient experiment data; whereas, fuzzy and interval variables are adopted to model the non-probabilistic uncertainties associated with expert opinions and limited information, respectively. By decomposing fuzzy parameters into interval variables based on level-cut strategy, inversion of the transformed interval random matrix is approximated by the first-order Neumann series first. Then the interval bounds of the probabilistic characteristics of temperature response can be calculated by using the random interval moment method. Their membership functions are eventually derived on the basis of fuzzy decomposition theorem. Numerical results demonstrate the feasibility and effectiveness of HUFEM to solve heat conduction problems with hybrid or pure uncertain parameters.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Thermal Sciences - Volume 98, December 2015, Pages 124–134
نویسندگان
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