کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4923945 1430825 2017 15 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A symmetry measure for damage detection with mode shapes
ترجمه فارسی عنوان
اندازه گیری تقارن برای تشخیص آسیب با اشکال حالت
کلمات کلیدی
اندازه گیری تقارن مداوم، شکل حالت، تقارن، شناسایی آسیب، نظارت بر سلامت سازمانی،
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
چکیده انگلیسی
This paper introduces a feature for detecting damage or changes in structures, the continuous symmetry measure, which can quantify the amount of a particular rotational, mirror, or translational symmetry in a mode shape of a structure. Many structures in the built environment have geometries that are either symmetric or almost symmetric, however damage typically occurs in a local manner causing asymmetric changes in the structure's geometry or material properties, and alters its mode shapes. The continuous symmetry measure can quantify these changes in symmetry as a novel indicator of damage for data-based structural health monitoring approaches. This paper describes the concept as a basis for detecting changes in mode shapes and detecting structural damage. Application of the method is demonstrated in various structures with different symmetrical properties: a pipe cross-section with a finite element model and experimental study, the NASA 8-bay truss model, and the simulated IASC-ASCE structural health monitoring benchmark structure. The applicability and limitations of the feature in applying it to structures of varying geometries is discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Sound and Vibration - Volume 408, 10 November 2017, Pages 123-137
نویسندگان
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