期刊
ULTRASONICS
卷 83, 期 -, 页码 126-136出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ultras.2017.06.004
关键词
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资金
- Natural Science Foundation of China [11472108, 61472111]
- Zhejiang Provincial Natural Science Foundation of China [LR16F020003]
- State Key Lab of CADCG [A1703]
- Zhejiang University
- Foundation for Young Talents in Higher Education of Guangdong, China [2015KQNCX122]
In this paper, we propose a semi-analytical isogeometric analysis(S-IGA) approach in the twist space to investigate the dispersive properties in helical thread waveguides, which combines the advantages of the spectral approach and IGA. The convergence and accuracy of the proposed method are discussed, by comparing S-IGA results with reference solutions. Additionally, the analytical expression of axial offset wavenumbers is derived to explain the difference of spectrograms between the Cartesian and twisted systems. In order to illustrate the effectiveness of the proposed method, some dispersion curves of elastic wave propagation in helical thread waveguides are presented for a wide range of thicknesses and tortuosities. (C) 2017 Published by Elsevier B.V.
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