An Experimental and Numerical Investigation of Mode Veerings
du Bois, J. L., Adhikari, S. and Lieven, N. A. J.
Proceedings of the 25th International Modal Analysis Conference
(IMAC-XXV), February 2007, Orlando, Florida, USA.
The manifestation of mode veering in structural dynamic problems
has been the subject of much debate in recent years. Initially
regarded as an anomaly occurring predominantly as a result of
numerical discretisation errors, it is now recognised as a
phenomenon occurring in a wide range of exact analytical
solutions. Myriad theoretical studies have explored the
characteristics of the behaviour but despite this, supporting
experimental data is scarce. A numerical and experimental
investigation of mode veering is undertaken here. Structural
loading is used to induce stress-stiffening effects in a redundant
truss. Geometric nonlinearities are included in a static FE
analysis to obtain a tangent stiffness, which is then used in a
linear dynamic solution. The eigenvalues and eigenvectors are
compared to the experimental data in the vicinity of a mode
veering, where the behaviour of the real structure is found to
correspond well with the theoretical observations. Practical
implications of real-world mode veering are discussed.
BiBTeX Entry
@INPROCEEDINGS{cp29,
AUTHOR={J. L. du Bois and S. Adhikari and N. A. J. Lieven},
TITLE={An experimental and numerical investigation of mode veerings},
BOOKTITLE={Proceedings of the 25th International Modal Analysis Conference (IMAC-XXV)},
YEAR={2007},
Address={Orlando, Florida, USA},
Month={February},
Note={}
}
by Sondipon Adhikari