ISSN:
1432-0681
Keywords:
Key words Experiment
;
modal analysis
;
frequency response
;
harmonic balance
;
friction damping
;
cubic stiffness
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Summary This paper seeks to exploit the reciprocal modal vector orthogonality between experimentally-derived mode shapes and the corresponding measured frequency response functions in order to derive a criterion for the detection of structural non-linearities. Being based on the use of measured data and experimentally-derived quantities only, the method is directly applicable to practical engineering cases for which there are usually no spatial descriptions. A brief outline of the reciprocal modal vector theory is given first, followed by a short description of a frequency-domain nonlinear response simulation technique using a harmonic balance approach. A detailed study of a 4-DOF system with cubic stiffness and friction damping nonlinearities is presented next. It is shown that the proposed nonlinearity detection criterion is relatively insensitive to measurement noise. It is concluded that the method is effective for detecting nonlinear behaviour in a consistent and quantitative fashion.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s004199900078
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