Estimation of surface pressure on a flange connection using non-linear ultrasonics

使用非线性超声波估算法兰连接上的表面压力

• 批准号: 22560728
• 负责人: CHO Hideo
• 金额: $ 2.5万
• 依托单位: Aoyama Gakuin University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 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-22560728/
• 关键词: 非破壊検査; 非線形超音波; 界面波; ガスケット; 接合状態; フランジ締結体; 長寿命化

For estimating surface pressure on a flange connection, non-linear ultrasonics and transmission coefficient of longitudinal wave propagating through an contacting interface were utilized. In a non-linear ultrasonic measurement on which double frequency of the incident longitudinal waves (second harmonic waves) to an interface was obtained, it is confirmed that a generation coefficient of the second harmonic waves related to surface pressure on a contacting interface. Distribution of the surface pressure can be estimated by using generation coefficient of the second harmonic waves. On the other hand, it is confirmed that the transmission coefficient on higher frequency component decreased as the surface pressure decreased. With frequency dependence of the transmission coefficient, the surface pressure can be obtained in a wide pressure range.

利用非线性超声和纵波通过接触界面的传播系数，对法兰连接表面压力进行了估算。在非线性超声测量中，得到了入射到接触面的纵波（二次谐波）的倍频，证实了二次谐波的产生系数与接触面表面压力有关。利用二次谐波的产生系数可以估计表面压力的分布。另一方面，证实了随着表面压力的减小，高频分量的透射系数减小。由于传输系数与频率相关，因此可以在较宽的压力范围内获得表面压力。

项目成果

高調波超音波を用いたフランジ面接触圧力の計測

使用谐波超声波测量法兰表面接触压力

• 发表时间: 2011
• 期刊: 非破壊検査
• 作者: 長秀雄;山田直紀;松尾卓摩
• 通讯作者: 松尾卓摩

Estimation of Contact Pressure of Solid-Solid Interface by Pulse Waves

用脉冲波估算固-固界面接触压力

• 发表时间: 2012
• 作者: H.Cho;R.Hosaka and T.Matsuo
• 通讯作者: R.Hosaka and T.Matsuo

Evaluation of surface pressure of flange connection by second harmonic waves

二次谐波评估法兰连接表面压力

• 发表时间: 2010
• 作者: H.Cho;N.Yamada;T.Matsuo
• 通讯作者: T.Matsuo