IJE TRANSACTIONS C: Aspects Vol. 27, No. 3 (March 2014) 395-402   

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A. Khalkhali, N. Narimanzadeh, S. Khakshournia and S. Amiri
( Received: May 20, 2013 – Accepted: August 22, 2013 )

Abstract    Low weight and high load capacity are remarkable advantages of sandwich panels with corrugated core, which make them more considerable by engineering structure designers. It’s important to consider the limitations such as yielding and buckling as design constraints for optimal design of these panels. In this paper, multi-objective optimization of sandwich panels with corrugated core is carried out by minimizing two supposed objective functions, the structure’s weight and deflection. The finite element model of structure is created using the commercial software ANSYS, which is employed to calculate the deflection of panel in different problem conditions. A NSGA-II code prepared in MATLAB, is used to perform the optimization process in a gradual evolution trend, which leads to obtain the Pareto front consisting a set of design vectors and optimal objective function vectors. Two conventional methods are then used to select the trade-off optimal point among the Pareto non-dominant optimal set.


Keywords    Sandwich panels, Multi-objective optimization, Finite elements method


چکیده    وزن کم و ظرفیت بار بالا از مزیت های قابل توجه پانل های ساندویچی با هسته موج دار هستند که موجب توجه مهندسین طراحان سازه می شوند. در نظر گرفتن محدودیت هایی مانند بازده و کمانش به عنوان قید های طراحی برای طراحی بهینه این پانل ها دارای اهمیت است. در این مقاله، بهینه سازی پانل های ساندویچی با هسته موج دار با به حداقل رساندن دو تابع، هدف شامل وزن و انحراف ساختار است انجام شده است. مدل المان محدود سازه با استفاده از نرم افزار تجاری ANSYS ایجاد شده که برای محاسبه انحراف پانل در شرایط مختلف به کار می رود. از کد NSGA-II که در MATLAB تهیه شده برای انجام فرایند بهینه سازی در روند تکامل تدریجی، که منجر به به دست آوردن جبهه پارتو شامل مجموعه ای از بردارهای طراحی و بهینه تابع هدف است، استفاده شده است. سپس در میان مجموعه بهینه غیر غالب پارتو، دو روش متداول برای انتخاب نقطه بهینه مورد استفاده قرار گرفت.



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