Experimental and Numerical Investigation of Mode Veering in a Stressed Structure

Jonathan L du Bois, Sondipon Adhikari, NAJ Lieven

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

Abstract

The manifestation of mode veering in structural dynamic problems has been the subject of much debate in recent years. Initially regarded as an anomolly 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 striss-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.
Translated title of the contributionExperimental and Numerical Investigation of Mode Veering in a Stressed Structure
Original languageEnglish
Title of host publicationInternational Modal Analysis Conference
Publication statusPublished - 2007

Bibliographical note

Conference Organiser: Society for Experimental Mechanics

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