کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
510602 865776 2015 17 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Identification of design parameter variability of honeycomb sandwich beams from a study of limited available experimental dynamic structural response data
ترجمه فارسی عنوان
شناسایی تغییرات پارامتر طراحی پارامترهای ساندویچ لانه زنبوری از مطالعه محدودیت های داده شده در دسترس واکنش های سازنده پویای سازه تجربی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر نرم افزارهای علوم کامپیوتر
چکیده انگلیسی

The goal of this paper is to characterise the variability of two important design parameters of thermoplastic honeycomb sandwich beams from the analysis of experimentally determined resonance frequencies and mode shapes of a limited number of test beams, under free boundary conditions. The design parameters are the Young’s modulus of the skin in length direction of the beam and the out-of-plane shear modulus of the honeycomb core. These two independent parameters are expressed as random fields using a Karhunen–Loève series expansion of the covariance matrix, available after updating the finite element models using the experimental vibration data. The random variables of this series expansion are expressed in terms of a Hermite polynomial chaos. The aleatory uncertainty is modelled by the Gaussian random variables while the epistemic uncertainty is described by the randomness of the polynomial chaos coefficients. An estimation of the uncertainty resulting from the experimental and numerical modal analysis is discussed, along with its influence on the two considered stiffness parameters.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computers & Structures - Volume 146, January 2015, Pages 197–213
نویسندگان
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