کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6954817 1451833 2018 17 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Possibility-based robust design optimization for the structural-acoustic system with fuzzy parameters
ترجمه فارسی عنوان
بهینه سازی طراحی قوی مبتنی بر امکان برای سیستم ساختاری آکوستیک با پارامترهای فازی
کلمات کلیدی
سیستم سازه-آکوستیک، پارامترهای فازی انتظار فازی و آنتروپی، امکان پذیری، طراحی قوی، چندجملهای چبیشف،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر پردازش سیگنال
چکیده انگلیسی
The conventional engineering optimization problems considering uncertainties are based on the probabilistic model. However, the probabilistic model may be unavailable because of the lack of sufficient objective information to construct the precise probability distribution of uncertainties. This paper proposes a possibility-based robust design optimization (PBRDO) framework for the uncertain structural-acoustic system based on the fuzzy set model, which can be constructed by expert opinions. The objective of robust design is to optimize the expectation and variability of system performance with respect to uncertainties simultaneously. In the proposed PBRDO, the entropy of the fuzzy system response is used as the variability index; the weighted sum of the entropy and expectation of the fuzzy response is used as the objective function, and the constraints are established in the possibility context. The computations for the constraints and objective function of PBRDO are a triple-loop and a double-loop nested problem, respectively, whose computational costs are considerable. To improve the computational efficiency, the target performance approach is introduced to transform the calculation of the constraints into a double-loop nested problem. To further improve the computational efficiency, a Chebyshev fuzzy method (CFM) based on the Chebyshev polynomials is proposed to estimate the objective function, and the Chebyshev interval method (CIM) is introduced to estimate the constraints, thereby the optimization problem is transformed into a single-loop one. Numerical results on a shell structural-acoustic system verify the effectiveness and feasibility of the proposed methods.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Mechanical Systems and Signal Processing - Volume 102, 1 March 2018, Pages 329-345
نویسندگان
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