| 高温管道超声导波监测的基础研究 |
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| 引用本文： | 徐鸿,王冰.高温管道超声导波监测的基础研究[J].声学技术,2009,28(5):610-614. |
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| 作者姓名： | 徐鸿 王冰 |
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| 作者单位： | 华北电力大学电站设备状态监测与控制教育部重点实验室,北京,102206 |
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| 摘 要： | 以电厂管道中常用的T91钢为例,在线弹性力学基础上,研究了当材料物性受高温影响而发生变化时,内径-壁厚比（RIRT）为4的中空管道中1-4阶纵向和扭转模态导波的传播特性。详细分析了在由于高温而引起材料物性变化时,各模态导波的频散特性的变化关系。研究发现,随着频厚积的增加,温度改变引起的材料物性变化,对各模态导波传播特征的影响力增强;对于1-3阶纵向和扭转模态导波,弹性模量的变化对频散曲线有着主导作用。
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| 关 键 词： | 导波 频散特性 温度变化 材料物性 |
| 收稿时间： | 2008/9/17 0:00:00 |
| 修稿时间： | 2008/12/15 0:00:00 |
Basic study of high temperature pipes inspection using ultrasonic guided waves |
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| XU Hong and WANG Bing.Basic study of high temperature pipes inspection using ultrasonic guided waves[J].Technical Acoustics,2009,28(5):610-614. |
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| Authors: | XU Hong and WANG Bing |
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| Affiliation: | (Key Laboratory of Condition Monitoring and Control for Power Plant Equipment, North China Electric Power University, Ministry of Education, Beijing 102206, China) |
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| Abstract: | Dispersion of T(0,1)-T(0,4) and L(0,1)-L(0,4) mode guided waves in the elastic steel Tgl pipe with a ratio of inner radius to thickness(RIRT) equal to 4 has been investigated on the basis of linear elastic hypothesis, when the ma-terial property is influenced by high temperature. The disperse relationship changing for foregoing modes, which is caused by material property variation, is studied. It has been found that the variation of material property caused by temperature changing has a stronger influence on propagating characteristics with the increase of frequency-thickness product. And for I-3 order guided waves, including longitudinal and tangential modes, the variation of elastic modulus plays an important role in influencing disperse curves. |
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| Keywords: | guided waves dispersion temperature change material property |
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