文章摘要
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)
作者单位
他得安 复旦大学, 电子工程系, 上海, 200433 
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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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