超声波参数对平底孔回波声压探测的影响
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Effect of Ultrasonic Parameters on Detection of the Echo Wave Sound Pressure of Flat bottom Hole
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    摘要:

    针对超声波轴线声压对平底孔缺陷回波声压影响的问题,研究了基于当量法的超声探伤方法。首先,从点声源到声轴线上一点处的声压模型出发,通过菲涅尔近似理论,建立了声轴线的发射声场,得到了平底孔反射体的回波声压模型。对平底孔反射体的回波受平底孔尺寸、平底孔深度、声源尺寸、发射频率的影响进行了理论上的分析,并进行了实验模拟。结果表明,所建立的模型能对定量的无损评估有一定的指导意义。

    Abstract:

    Aimed at the problem of ultrasonic axis’s sound pressure impacting on flat bottom hole defect echo wave,this paper studies the approach of ultrasonic flaw based equivalent method.Firstly,according to the sound pressure model from the point sound source to a point on the sound axis,the transmitting sound field of wave axis has been set up and echo sound pressure model of the flat bottom hole reflector has been established with Fresnel approximation theory.Then the effects of the dimension of flat bottom hole,the depth of flat bottom hole,the sound source size and the transmission frequency on the echo wave of the flat bottom hole have been analyzed theoretically and simulated with experiment.The results showed that the model could be a guide to the quantitative nondestructive assessment.

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张晶,王黎,彭建平,罗林.超声波参数对平底孔回波声压探测的影响[J].压电与声光,2012,34(4):515-518. ZHANG Jing, WANG Li, PENG Jianping, LUO Lin. Effect of Ultrasonic Parameters on Detection of the Echo Wave Sound Pressure of Flat bottom Hole[J]. PIEZOELECTRICS AND ACOUSTOOPTICS

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  • 在线发布日期: 2012-09-25
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