Guided wave focusing mechanics in pipe

被引：13

作者：

Hayashi, T ^{[1
]}

Kawashima, K

Sun, ZQ

Rose, JL

机构：

[1] Inst Technol, Dept Mech Engn, Nagoya, Aichi, Japan

[2] Ultrasonic Mat Diag Lab, Nagoya, Aichi, Japan

[3] Gen Elect Global Res Ctr, Niskayuna, NY USA

[4] Penn State Univ, Dept Engn Sci & Mech, University Pk, PA USA

来源：

JOURNAL OF PRESSURE VESSEL TECHNOLOGY-TRANSACTIONS OF THE ASME | 2005年 / 127卷 / 03期

关键词：

D O I：

10.1115/1.1990209

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Guided waves can be used in pipe inspection over long distances. Presented in this paper is a beam focusing technique to improve the S/N ratio of the reflection from a tiny defect. Focusing is accomplished by using nonaxisymmetric waveforms and subsequent time delayed superposition at a specific point in a pipe. A semianalytical finite element method is used to present wave structure in the pipe. Focusing potential is also studied with various modes and frequencies

引用

页码：317 / 321

页数：5

共 9 条

[1]

Alleyne DN, 1997, MATER EVAL, V55, P504

[2] TIME-REVERSAL OF ULTRASONIC FIELDS .1. BASIC PRINCIPLES [J].