کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
792667 902309 2008 19 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Exact and numerical responses of a plate under a turbulent boundary layer excitation
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
پیش نمایش صفحه اول مقاله
Exact and numerical responses of a plate under a turbulent boundary layer excitation
چکیده انگلیسی

The aim of this paper is the analysis of the predictive capabilities of the deterministic methodologies when facing the problem of a plate excited by a stochastic pressure distribution due to a turbulent boundary layer (TBL). A full analytical solution has been assembled by considering a simply supported rectangular plate wetted on one side by a TBL. This reference exact solution, developed by using a standard separable variable model, has been used as test case for comparing the approximate solutions coming from the adoption of a numerical scheme by using discrete coordinates. The numerical algorithm has been built by using a standard finite element modal approach. The approximations introduced are thoroughly discussed and analysed; they refer to the meshing condition and the transformation of the distributed stochastic load. The application of a novel numerical procedure named as Asymptotical Scaled Modal Analysis is presented too. This innovative numerical scheme allows the analysis of the structural response of a generic plane operator in the whole frequency range, which is not always amenable by exact solutions; further and equally important, it is associated to a reduction of the computational cost. The work demonstrates that some numerical advances in the prediction of the random structural responses are feasible still using standard finite element modal inputs, without increasing the computational costs.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Fluids and Structures - Volume 24, Issue 2, February 2008, Pages 212–230
نویسندگان
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