Finite Element Analysis of Propagation Characteristics of Guided Waves in Helically-Curved Ｒods

doi:10.3969/j.issn.1000-565X.2014.08.002

Journal of South China University of Technology (Natural Science Edition) ›› 2014, Vol. 42 ›› Issue (8): 6-13,33.doi: 10.3969/j.issn.1000-565X.2014.08.002

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Finite Element Analysis of Propagation Characteristics of Guided Waves in Helically-Curved Ｒods

Li Chun-lei Han Qiang Liu Yi-jie Xiao Dong-liang

School of Civil Engineering and Transportation,South China University of Technology,Guangzhou 510640,Guangdong,China

Received:2013-10-29 Revised:2014-03-14 Online:2014-08-25 Published:2014-07-01
Contact: 韩强(1963-)，男，教授，博士生导师，主要从事弹塑性动力学、波动理论等研究． E-mail:emqhan@scut.edu.cn
About author:李春雷(1990-)，男，博士生，主要从事复杂钢索波动理论研究． E-mail:smchlli@163．com
Supported by:
国家自然科学基金重点资助项目( 11132002) ; 华南理工大学中央高校基本科研业务费专项资金资助项目( x2tj-D2120420)

Abstract

Abstract:

This paper deals with the propagation characteristics of guided waves in helically-curved rods by meansof the finite element method.First,the coordinate transformation and the two-dimensional fast Fourier transform( 2D-FFT) are employed to process and analyze guided waves.Then,the propagation processes of guided waves inthe helically-curved rods respectively with different diameters and different helix angles are simulated,and theeffects of the diameter and the helix angle on the propagation are described.Finally,the cut-off frequency and themodal separation phenomena occurring in the propagation process are discussed.

Key words: helically-curved rod, guided waves, two-dimensional fast Fourier transform, finite element method

CLC Number:

O32
O426

Li Chun-lei Han Qiang Liu Yi-jie Xiao Dong-liang. Finite Element Analysis of Propagation Characteristics of Guided Waves in Helically-Curved Ｒods[J]. Journal of South China University of Technology (Natural Science Edition), 2014, 42(8): 6-13,33.

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Finite Element Analysis of Propagation Characteristics of Guided Waves in Helically-Curved Ｒods

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