期刊
COMPOSITE STRUCTURES
卷 149, 期 -, 页码 114-124出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compstruct.2016.03.044
关键词
Modal analysis; Auxetic; Honeycomb; Gradient cellular structure
资金
- Rolls-Royce plc through the Composites University Technology Centre (UTC) at the University of Bristol, UK
- Rolls-Royce plc
- Technology Strategy Board (TSB)
- Project REACTICS [UK DTI 16093]
- UK Royal Society [RG2265]
The paper describes a vibroacoustics analysis of auxetic gradient honeycomb composite structures with hexagonal configurations. We examine two classes of gradient cellular layout - one with continuously varying internal cell angle, the other with gradient cell wall aspect ratio across the surface of the honeycomb panel. The structural dynamics behaviour of the two gradient honeycomb configurations is simulated using full-scale Finite Elements and Component Mode Synthesis (CMS) substructuring. Samples of the gradient honeycombs have been manufactured by means of 3D printing techniques, and subjected to modal analysis using scanning laser vibrometry. We observe a general good comparison between the numerical and the experimental results. A numerical parametric analysis shows the effect of the gradient topology upon the average mobility and general vibroacoustics response of these particular cellular structures. (C) 2016 Elsevier Ltd. All rights reserved.
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