期刊论文

中文

铁道科学与工程学报

1672-7029

2015

12

4

911-916

10.19713/j.cnki.43-1423/u.2015.04.032

国家自然科学基金项目（51205031） 湖南省自然科学基金项目（2015JJ4004） 湖南省高校创新平台开放基金项目（14K003） 湖南省高校重点实验室开放基金项目（2014kfjj05）

本校为第一机构

为解决超声相控阵检测列车轮辋易出现的成像质量低和缺陷识别困难等问题,分析相控阵换能器声压特性,获取合适的缺陷检测深度,讨论轮辋界面及耦合情况对成像质量的影响,开展轮辋试块相控阵检测实验。以水平孔和管穿槽缺陷为例,研究不同深度缺陷的回波幅值变化特点及成像质量,并通过与平面试块对比分析,获得轮辋相控阵成像质量的主要影响因素和影响规律,为改进轮辋超声相控阵检测工艺和提高缺陷检测精度提供参考。

To solve the problem of low image quality and defect identification difficulty when using ultrasonic phased array to inspect train wheel rim,the sound pressure characteristics of phased array transducer were ana-lyzed.Besides,the suitable detection depth was obtained as well.The effects of the rim contact surface and cou-pling status for the image quality were analyzed.An ultrasonic phased array inspection experiment was carried out on a wheel rim test block.Taking a horizontal hole and a slot as defect examples,the echo amplitude chan-ging characteristic and image quality were studied.By comp...