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敲击锤参数对风力机叶片声振法检测深度的影响

刘荣梅, 孙梁, 周克印

刘荣梅, 孙梁, 周克印. 敲击锤参数对风力机叶片声振法检测深度的影响[J]. 无损检测, 2016, 38(5): 5-9. DOI: 10.11973/wsjc201605002
引用本文: 刘荣梅, 孙梁, 周克印. 敲击锤参数对风力机叶片声振法检测深度的影响[J]. 无损检测, 2016, 38(5): 5-9. DOI: 10.11973/wsjc201605002
LIU Rong-mei, SUN Liang, ZHOU Ke-yin. Influence of Impact Hammer on Parameter Acoustic Vibration Detecting Depth inside Wind Turbine Blade[J]. Nondestructive Testing, 2016, 38(5): 5-9. DOI: 10.11973/wsjc201605002
Citation: LIU Rong-mei, SUN Liang, ZHOU Ke-yin. Influence of Impact Hammer on Parameter Acoustic Vibration Detecting Depth inside Wind Turbine Blade[J]. Nondestructive Testing, 2016, 38(5): 5-9. DOI: 10.11973/wsjc201605002

敲击锤参数对风力机叶片声振法检测深度的影响

基金项目: 

国家科技支撑项目计划资助项目(2012BAA01B02)

江苏省博士后基金资助项目(1302071B)

详细信息
    作者简介:

    刘荣梅(1975-), 女, 博士, 副教授, 主要从事测试技术研究工作。

  • 中图分类号: TM315;TB302.5;TG115.28

Influence of Impact Hammer on Parameter Acoustic Vibration Detecting Depth inside Wind Turbine Blade

  • 摘要: 为提高风力机叶片声振法的检测深度, 利用有限元软件, 对风力机叶片声振法检测过程进行动力学模拟, 选取冲击过程中应力波能量辐射系数为参数, 分析敲击锤参数对应力波能量辐射系数的影响, 以期得到更高的应力波能量辐射系数, 从而达到提高声振法检测缺陷深度的目的。有限元模拟结果表明, 除了敲击锤材料的泊松比外, 其直径、锤身长度、锤头材料弹性模量以及冲击速度均对应力波能量辐射系数产生影响。在模拟分析结果的基础上, 通过比较不同敲击锤尺寸下的应力持续时间, 得出适当选取敲击锤参数可提高结构声振法缺陷的检测深度的结论。
    Abstract: Acoustic vibration has been applied in nondestructive examination of wind turbine blade because of its simplicity and applicability. In order to detect the deep defect, the dynamic procedure during the acoustic vibration of the wind turbine blade was simulated by finite element method (FEM). The influence of the hammer size and impact velocity on the stress wave energy radiation coefficient (SWERC) during the vibration was studied. The larger the radiation coefficient was, the deeper delamination could be recognized experimentally. The FEM analysis indicated that the parameters, such as the diameter and the length of the hammer, elastic modulus of the hammerhead and original impact velocity, had obvious influence on the SWERC. Based on the simulated results, two examples considering different hammering parameters were studied. The study indicates that an appropriate hammer could be designed to expand the detection depth.
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出版历程
  • 收稿日期:  2015-09-02
  • 刊出日期:  2016-05-09

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