کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
290078 509712 2008 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Smooth orthogonal decomposition for modal analysis of randomly excited systems
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
پیش نمایش صفحه اول مقاله
Smooth orthogonal decomposition for modal analysis of randomly excited systems
چکیده انگلیسی

Modal parameter estimation in terms of natural frequencies and mode shapes is studied using smooth orthogonal decomposition for randomly excited vibration systems. This work shows that under certain conditions, the smooth orthogonal decomposition eigenvalue problem formulated from white-noise induced response data can be tied to the unforced structural eigenvalue problem, and thus can be used for modal parameter estimation. Using output response ensembles only, the generalized eigenvalue problem is formed to estimate eigenfrequencies and modal vectors for an eight-degree-of-freedom lightly damped vibratory system. The estimated frequencies are compared against system frequencies obtained from structural eigenvalue problem and estimated modal vectors are checked using the modal assurance criterion. For lightly damped simulations, satisfactory results are obtained for estimating both system frequencies and modal vectors.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Sound and Vibration - Volume 316, Issues 1–5, 23 September 2008, Pages 137–146
نویسندگان
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