Thesis-1999-Liang.pdf (3 MB)
Analysis of dominating dynamic characteristics of structures
thesis
posted on 2014-01-28, 09:30 authored by Jian LiangThe work presented in this thesis is motivated by a need for an advanced understanding of the
governing mechanisms for vibrations in complex structures. In order to obtain a simplified
description of the complex structure with the dominant information of the structure enhanced, one
removes some unimportant structural information from the description by identifying secondary
contributing substructures and couplings, then describing them using simplified models. It is found
that the secondary substructures are those substructures being required for their vibrational
transmission characteristics only, and the secondary couplings are the weak couplings in the
structure. Moreover, it is demonstrated that the transmission characteristics can be sufficiently
described by using only the direct wave and the fIrst reflection in the structure, and the secondary
coupling can be simplified as an idealised coupling. The procedure for establishing such a
simplifIed description for the complex structure is illustrated by a two-element built-up structure.
Finally, the efficiency of using such a simplifIed description to analyse the complex structure is
demonstrated for two mechanical artefacts, one being a laboratory structure consisting of a
cylindrical shell attached to a plate via two beams, and the other a full-scale aircraft - EurofIghter
2000.
History
School
- Aeronautical, Automotive, Chemical and Materials Engineering
Department
- Aeronautical and Automotive Engineering
Publisher
© Jian LiangPublication date
1999Notes
A Doctoral Thesis. Submitted in partial fulfilment of the requirements for the award of Doctor of Philosophy of Loughborough UniversityEThOS Persistent ID
uk.bl.ethos.297772Language
- en