کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8050685 1519359 2017 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Estimación de parámetros modales de estructuras civiles a partir de la función de respuesta en frecuencia
ترجمه فارسی عنوان
برآورد طول مودال سازه های مدنی بر اساس عملکرد پاسخ فرکانسی
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مکانیک محاسباتی
چکیده انگلیسی
This paper focuses on estimating the modal parameters of the dynamic system that constitutes the pedestrian footbridge of the Science Museum of the city of Valladolid (Spain). The work consists not only of calculating natural frequencies and damping factors associated to each of the estimated modes, as many commercial software provide from acceleration measurements of tests OMA (Operational Modal Analysis) and/or EMA (Experimental modal Analysis), but the aim of this paper is to calculate the generalized masses corresponding to each of the estimated modes of the structure. For this purpose, firstly a representation of the dynamic system is obtained in the state space by SSI technique (Stochastic Subspace Identification), and secondly, vibration modes are scaled from the estimation of the residues of the decomposition in partial fractions of the frequency response function (FRF) measurements. This method gets accurate estimations in the results whose vibration modes are excited, allowing the simulation of the dynamic response of the structure without the need for updating a finite element model of the structure under study.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería - Volume 33, Issues 3–4, July–December 2017, Pages 197-203
نویسندگان
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