Page 105 - 《应用声学》2020年第5期

第 39 卷 第 5 期 Vol. 39, No. 5
2020 年 9 月 Journal of Applied Acoustics September, 2020

⋄ 研究报告 ⋄

斜入射SH波厚壁管道内壁裂纹检测方法 ∗

赵 亮 张 金 † 董子华 王 鑫 王学彬

(陆军炮兵防空兵学院 合肥 230031)

摘要：厚壁管道常被用于军事装备及其他流程工业中，长期使用后内壁会产生较多微裂纹，成为影响构件安全
运行的重大隐患。为此，该文针对厚壁管道内壁裂纹难以检测的问题，提出基于斜入射 SH 波的厚壁管道检测
方法，对厚壁管道内壁不同深度的裂纹进行检测。首先对斜入射 SH 波的激励原理进行分析，建立声场模型优
选激励频率，研究斜入射 SH 波与厚壁管道内壁裂纹径向深度的作用规律，并通过实验对仿真结果进行验证。
研究结果表明，斜入射 SH 波对该型管道最佳检测频率为 1 MHz；随着裂纹径向深度增加，缺陷回波幅值呈现
曲折型上升；斜入射 SH 波可对厚壁管道内壁轴向长 8 mm、径向深 1 mm 和周向宽 1 mm 的微裂纹进行有效
检测，验证了斜入射 SH 波厚壁管道内壁裂纹检测方法的科学性和可行性。
关键词：厚壁管道；裂纹检测；斜入射 SH 波；频率优选
中图法分类号: TG115.28 文献标识码: A 文章编号: 1000-310X(2020)05-0747-06
DOI: 10.11684/j.issn.1000-310X.2020.05.013

The detection method of cracks on the inner wall of thick wall pipes

with inclined beams of SH waves

ZHAO Liang ZHANG Jin DONG Zihua WANG Xin WANG Xuebin

(Army Artillery Air Defense Academy, Heifei 230031, China)

Abstract: Thick-walled pipes are often used in military equipment and other process industries. After long-
term use, the inner wall will produce more cracks, which will become a major hidden danger affecting the safe
operation of components. For this reason, this paper proposes a thick-walled pipeline detection method based
on inclined beams of SH waves for the problem that the cracks on the inner wall of thick-walled pipelines are
difficult to detect, and detects cracks at different depths on the inner wall of thick-walled pipelines. In this
paper, the excitation principle of inclined beams of SH waves is analyzed firstly, the excitation frequency of
sound field model is established, and the action law of inclined beams of SH waves and radial depth of thick
wall inner wall crack is studied. The simulation results are verified by experiments. The results show that the
optimal detection frequency of the inclined beams of SH waves is 1 MHz. With the increase of the radial depth
of the crack, the amplitude of the defect waves increases in a zigzag pattern. The inclined beams of SH waves
can effectively detect micro-cracks with an axial length of 8 mm, a radial depth of 1 mm and a circumferential
width of 1 mm in thick-walled pipelines.
Keywords: Thick-walled pipe; Crack detection; Inclined beams of SH waves; Frequency optimization

2019-11-13 收稿; 2020-03-31 定稿
装备预研基金项目 (914A17050312JB91202)
∗
作者简介: 赵亮 (1995– ), 男, 安徽淮南人, 硕士研究生, 研究方向: 装备测试计量与维修。
† 通信作者 E-mail: jgxyzhangjin@163.com