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|  | | 为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法,我们为您准备了出自英文原文的大量英语例句,供您参考。 | |
Application of Hilbert-Huang signal processing to ultrasonic non-destructive testing of oil pipelines
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A Blind Source Separation Technique for Extracting Sinusoidal Interferences in Ultrasonic Non-Destructive Testing
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| | In this paper, the fuzzy cluster analysis method is employed for researching the possibility of recognizing flaws detected in ultrasonic testing. The result shows that the sort of the flaws in seamless steel tubes can be recognized by this fuzzy mathematics method. Because of the data sampling and prosessing as well as the fuzzy algorithm all are operated by microcomputer, so that it is convenient for studying and utilizing this method forwards. | | 本文探索了用模糊聚类分析方法解决超声无损检测中识别缺陷的可能性。结果表明,用这种模糊数学方法可以识别出钢管标准缺陷的类别。研究中采用了微机数据采集、处理和模糊运算。 | | 文摘来源 | | As composite materials have found increasingly wide application in industry during recent more than twenty years, the technique of Ultrasonic non-destructive testing and evaluation of composites is urgently demanded in the industrial world. New problems,therefore, have been encountered and new progresses extended in this field. In this paper,some new developments in Ultrasollic NDT and NDE for the fiber-reinfoeced composites are reviewed. | | 由于复合材料在工业上得到了广泛的应用,使工业界对复合材料的超声无损检测与评价技术提出了更高的要求.在复合材料超声检测与评价中遇到了一些新问题,因而也就有新发展.本文介绍纤维增强型复合材料超声检测与评价技术的某些进展. | | 文摘来源 | | The scattering of shear horizontal (SH) waves in a layered composites with weakly bonded interfaces was discussed by using the shear spring model of infirm interface and the theories of elastic waves, and also the analytical solution was obtained. The numerical example results show that with different locations of infirm interfaces, there are great differences between the coefficients of reflection and transmission of SH waves incidencing at a given angle in layered composites. With the changing of the pa... | | 对含有弱界面的复合材料层合板,采用弱连接界面的剪切弹簧模型,借助波函数法研究了水平剪切波入射时层合板对波的散射,得到了解析结果.数值计算结果表明,弱界面处在不同位置时,对以一定角度入射到复合材料层合板的水平剪切波,其反射和透射系数有明显变化;当层合板中弱界面的力学性能参数强弱不同时,以入射角为变量所得到的透射系数和反射系数曲线呈现出明显差异.证明了根据含弱界面复合材料层合板所得到的水平剪切波的散射规律,不仅能够确定反映弱界面力学性质的参数R的大小,而且还能够判明弱界面所在的位置,这将为复合材料层合板中弱界面的超声无损检测提供依据. | | 文摘来源 | |   | | << 更多相关文摘 |
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