Effect of crack induced nonlinearity on dynamics of structures: application to structural health monitoring

被引:3
|
作者
Broda, D. [1 ]
Hiwarkar, V. [2 ]
Silberschmidt, V. V. [3 ]
Staszewski, W. J. [1 ]
机构
[1] AGH Univ Sci & Technol, Dept Robot & Mechatron, PL-30059 Krakow, Poland
[2] Univ Nottingham, Mech Mat & Mfg Engn, Nottingham NG7 2RD, England
[3] Loughborough Univ, Wolfson Sch Mech & Mfg Engn, Loughborough LE11 3TU, Leics, England
关键词
BEAM; VIBRATION; BEHAVIOR; IDENTIFICATION;
D O I
10.1088/1742-6596/451/1/012015
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
In recent years, there has been a growing interest in vibration-based structural health-monitoring techniques. At present, most of the vibration-based techniques consider an open crack, which is far from realistic situations. In real-life scenarios crack can open and close under the dynamic loading. This bilinear behavior of crack has a significant effect on dynamics of structures which was investigated by performing finite-element simulations of a beam with a breathing crack excited longitudinally. Its response measured at different locations with regard to the crack indicated that the crack-induced nonlinearity had a localized effect on dynamics of the beam. Measurements obtained near the crack revealed complex spectra with higher harmonics.
引用
收藏
页数:7
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