| 他得安.复合管内径壁厚比对导波速度的影响[J].声学技术,2004,(3):133~137 |
| 复合管内径壁厚比对导波速度的影响 |
| Effects of inner-radius-to-thickness ratio of composite pipes on velocity of guided waves |
| 投稿时间：2003-12-01 修订日期：2004-03-26 |
| DOI： |
| 中文关键词: 复合管材 内径壁厚比 导波 速度 |
| 英文关键词: composite pipes inner-radius-to-thickness ratio guided waves velocity |
| 基金项目:上海市博士后科学基金资助项目(2002年) |
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| 中文摘要: |
| 文章分析了复合管材中超声纵向较低阶导波模式的频散特性,在一般的弹性动力学运动方程的基础上,讨论了内径壁厚比对导波传播速度的影响。结果表明:当材料和频厚积一定时,复合管材中导波的速度只与内径壁厚比有关;当内径壁厚比和频厚积较小时,内径壁厚比的变化对低阶导波模式的传播速度有较大的影响,但随内径壁厚比和频厚积的增加,这种影响将减小。 |
| 英文摘要: |
| The paper analyzed the dispersive characteristics of ultrasonic longitudinal guided waves in composite pipes. Based on the general equations of elastodynamics, the effects of inner-radius-to-thickness ratio (IRTR) on propagation velocity of guided waves are analyzed. The results show that, for a certain material and a certain frequency-thickness product, the propagation velocity of guided waves in composite pipes are only related to IRTR of the pipe. When both IRTR and frequency-thickness product are smaller, the change of IRTR has a significant influence on the velocity of lower-order guided waves, while with the increase of IRTR and frequency-thickness product, the influence of IRTR will be reduced. |
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