Ultrasonic NDE of thick polyurethane flexible riser stiffener material
Ultrasonic NDE of thick polyurethane flexible riser stiffener material
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DOI：
10.1080/10589759.2016.1241253
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发表时间：
2017-10
影响因子：
2.6
通讯作者：
I. Mohamed;D. Hutchins;L. Davis;S. Laureti;M. Ricci
中科院分区：
文献类型：
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作者：
I. Mohamed;D. Hutchins;L. Davis;S. Laureti;M. Ricci
频率低于1mhz的超声信号已被用于厚聚合物样品的无损检测。编码信号，如啁啾和双极Golay码，连同脉冲压缩和信号处理，已被用于穿透衰减聚丙烯提升管加强材料的厚段，使用压电复合换能器提供所需的带宽。结果表明，该方法可用于检测柔性隔水管加强板中的气泡等制造缺陷，这些缺陷可能会影响隔水管加强板在海上油气环境中的性能。
Abstract Ultrasonic signals at frequencies below 1 MHz have been used for the NDE of thick polymer samples. Coded signals such as chirps and bipolar Golay codes, together with pulse compression and signal processing, have been used to penetrate into thick sections of attenuating polypropylene riser stiffener material, using piezocomposite transducers to provide the required bandwidth. It is shown that this approach can be used to detect manufacturing defects such as air bubbles in flexible riser stiffeners, which might compromise their performance in the offshore oil and gas environments.