| 承压界面接触特性超声检测 |
| |
| 引用本文： | 焦敬品, 曾宪超, 刘文华, 何存富, 吴斌. 承压界面接触特性超声检测[J]. 北京工业大学学报, 2012, 38(6): 807-812. |
| |
| 作者姓名： | 焦敬品 曾宪超 刘文华 何存富 吴斌 |
| |
| 作者单位： | 1.北京工业大学 机械工程与应用电子技术学院, 北京 100124 |
| |
| 基金项目： | 国家自然科学基金资助项目，北京市科技新星计划资助项目 |
| |
| 摘 要： | 针对由于接触界面的非完好性, 使得超声波在接触界面处传播呈现非线性效应问题, 建立了一维纵波在承压界面传播的简化模型, 利用界面处超声波透射系数表征界面刚度.在不同压力下, 进行界面超声检测试验, 归纳界面刚度系数与压力的幂律系数.结果表明, 可利用超声波在接触界面的刚度系数和非线性系数等特征参数进行界面接触状态的评价.
|
| 关 键 词： | 界面 接触特性 非线性超声 界面刚度 透射系数 |
| 收稿时间： | 2010-05-18 |
Ultrasonic Testing on Contact State of Pressure Interfaces |
| |
| JIAO Jing-pin, ZENG Xian-chao, LIU Wen-hua, HE Cun-fu, WU Bin. Ultrasonic Testing on Contact State of Pressure Interfaces[J]. Journal of Beijing University of Technology, 2012, 38(6): 807-812. |
| |
| Authors: | JIAO Jing-pin ZENG Xian-chao LIU Wen-hua HE Cun-fu WU Bin |
| |
| Affiliation: | 1.College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing 100124, China |
| |
| Abstract: | The non-perfection of contacting interfaces causes the non-trivial features including the contact acoustic nonlinearity(CAN) for ultrasound propagating through the interface.A simple model for one-dimensional longitudinal wave transmission through non-perfect interfaces is proposed,and the transmission coefficient is used to show the interface stiffness.Ultrasonic transmission experiments are carried out to investigate the contact state of the interface under different pressures,and the power-law relationship between the pressure and the stiffness coefficients is established by best fitting the measured ultrasound data.Results show that it is feasible to characterize the pressure-applied interfaces by using the transmission coefficients of the first and second order harmonics in transmitted ultrasonic waves. |
| |
| Keywords: | interface contact characteristics nonlinear ultrasonic interfacial stiffness transmission coefficient |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《北京工业大学学报》浏览原始摘要信息 |
|
点击此处可从《北京工业大学学报》下载全文 |
|
