Evaluation of Bolt-Nut Fastening Condition Using Nonlinear Ultrasonic Components

使用非线性超声波元件评估螺栓螺母紧固状况

• 批准号: 22760293
• 负责人: FUKUDA Makoto
• 金额: $ 2.58万
• 依托单位: Akita University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2010
• 资助国家: 日本
• 起止时间: 2010 至 2012
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22760293/
• 关键词: 計測工学; 機械材料・材料力学; 解析・評価; 非線形超音波; ボルト締結; 軸力; トルク; 有限振幅超音波; 2次高調波; 非破壊検査; 接触型音響非線形性; 非線形音波; 二層型圧電振動子

This study examines the use of ultrasonic second harmonic components in the quality control of bolt-fastened structures. An improved method for detecting the second harmonic components, from a bolt fastened with a nut, using the transmission method is constructed. A hexagon head iron bolt was used in the experiments. The bolt was fastened using a digital torque wrench. The second harmonic component increased by approximately 10 dB before and after the bolt was fastened. The sources of second harmonic components were contact acoustic nonlinearity in the screw thread interfaces of the bolt-nut and were the plastic deformation in the bolt with fastening bolt. This result was almost same compared with previous our method. Moreover, increase values of second harmonic components are changed at the normal axial force. Consequently, usefulness of the novel method for detecting second harmonic ultrasonic components generated from fastened bolt was confirmed.

本研究探讨了超声波二次谐波分量在螺栓紧固结构质量控制中的应用。构建了一种使用传输法检测用螺母紧固的螺栓的二次谐波分量的改进方法。实验中使用了六角头铁螺栓。使用数字扭矩扳手紧固螺栓。螺栓紧固前后二次谐波分量增加约10dB。二次谐波分量的来源是螺栓-螺母螺纹界面中的接触声非线性以及带有紧固螺栓的螺栓中的塑性变形。与我们之前的方法相比，这个结果几乎相同。此外，在法向轴向力下二次谐波分量的增加值发生变化。因此，证实了用于检测紧固螺栓产生的二次谐波超声波分量的新方法的有效性。

项目成果

Detection of second harmonic components of Lamb waves passed through fatigue tested magnesium plate

• DOI: 10.1109/ultsym.2011.0187
• 发表时间: 2011-10
• 期刊: 2011 IEEE International Ultrasonics Symposium
• 作者: M. Fukuda;K. Imano;H. Yamagishi;K. Sasaki

2次高調波を用いたボルト締結体の軸力評価に関する検討

利用二次谐波评估螺栓体轴向力的研究

• 发表时间: 2010
• 作者: 福田誠;米内巨樹;吉田和博;今野和彦
• 通讯作者: 今野和彦

2 次高調波超音波を利用したボルト締結評価に関する検討

二次谐波超声螺栓紧固评价研究

• 发表时间: 2012
• 作者: 福田誠;米内巨樹;今野和彦
• 通讯作者: 今野和彦

Detection of Second Harmonic Ultrasonic Components Generated in Solids Interface

固体界面中产生的二次谐波超声波分量的检测

• 发表时间: 2012
• 作者: M. Fukuda;T. Harada and K. Imano
• 通讯作者: T. Harada and K. Imano

Detection of Second-Harmonic Components of Lamb Waves Generated from Fatigue Plate Using a Double-Layered Piezoelectric Transducer

• DOI: 10.1143/jjap.51.07gb06
• 发表时间: 2011-10
• 期刊: Japanese Journal of Applied Physics
• 影响因子: 1.5
• 作者: M. Fukuda;K. Imano;H. Yamagishi;K. Sasaki