Development of non-destructive detection system of breathing cracks using dynamic response

动态响应呼吸裂纹无损检测系统的研制

基本信息

  • 批准号:
    17560206
  • 负责人:
  • 金额:
    $ 2.24万
  • 依托单位:
  • 依托单位国家:
    日本
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
  • 财政年份:
    2005
  • 资助国家:
    日本
  • 起止时间:
    2005 至 2006
  • 项目状态:
    已结题

项目摘要

In this project, first, we developed a method for vibration analysis of a beam with breathing cracks. In the developed method, the governing equations are formulated using the finite element method based on the mixed variational principle. Then, the governing equation is solved using the incremental harmonic balance method. We confirmed that the developed method can analyze steady-state vibrations of a beam with breathing cracks with high accuracy and efficiency. Next, we developed a detection technique of breathing cracks in a beam using dynamic response based on the developed analysis method. We confirmed via numerical simulation that the developed detection technique can detect breathing cracks accurately. Next, in order to check further the applicability of the developed detection technique, we conducted experiment. In the experiment we used a steel beam with a breathing crack. The breathing crack was simulated by a thin saw-cut to which the thin steel plate with the same thickness as the width of the saw-cut was inserted. We used measured data from the experiment to detect the crack. The accurate detection result was observed. Thus we confirmed the applicability of the developed detection technique for a beam. Finally, we extended the detection technique for a beam to a technique for a frame structure whose typical is a piping system. The developed analysis method based on the mixed variational principle has feature that it can be applied to such a frame structure without large modification. Thus the procedure of the detection technique for a frame structure is very similar to that for a beam. The applicability of the extended detection technique was confirmed by numerical simulation.
在这个项目中,首先,我们开发了一种方法,用于振动分析的梁呼吸裂纹。在所开发的方法中,控制方程采用基于混合变分原理的有限元法。然后,采用增量谐波平衡法求解控制方程。我们证实,所开发的方法可以分析具有呼吸裂纹的梁的稳态振动,具有高精度和高效率。接下来,我们开发了一种检测技术的呼吸裂纹梁使用动态响应的基础上开发的分析方法。我们通过数值模拟证实,所开发的检测技术可以准确地检测呼吸裂纹。接下来,为了进一步检查开发的检测技术的适用性,我们进行了实验。在实验中,我们使用了一个有呼吸裂缝的钢梁。通过插入厚度与锯切宽度相同的薄钢板的薄锯切来模拟呼吸裂纹。我们使用实验中的测量数据来检测裂纹。观察到准确的检测结果。因此,我们证实了光束的检测技术的适用性。最后,我们将梁的检测技术扩展到以管道系统为典型的框架结构的检测技术。本文提出的基于混合变分原理的分析方法具有不需作大的修改即可适用于此类框架结构的特点。因此,用于帧结构的检测技术的过程非常类似于用于梁的检测技术的过程。通过数值模拟验证了扩展检测技术的适用性。

项目成果

期刊论文数量(10)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Nonlinear Vibration Analysis of a Beam with Breathing Cracks (Finite Element Analysis Based on the Mixed Variational Principle)
带有呼吸裂纹的梁的非线性振动分析(基于混合变分原理的有限元分析)
Detection o Breathing Cracks in a Beam Using Dynamical Response
使用动态响应检测梁中的呼吸裂纹
Detection of Breathing Cracks in a Frane Structure Using Dynamic Response
使用动态响应检测框架结构中的呼吸裂纹
ブリージングクラックをもつはりの非線形振動解析(混合型変分原理に基づく有限要素解析)
含呼吸裂纹梁的非线性振动分析(基于混合变分原理的有限元分析)
Detection of Breathing Cracks in a Beam Using Dynamical Response
使用动态响应检测梁中的呼吸裂纹
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KAMIYA Keisuke其他文献

Improvement of the nullspace matrix method of differential equation type for motion analysis of multibody systems
多体系统运动分析微分方程型零空间矩阵法的改进
  • DOI:
    10.1299/transjsme.18-00288
  • 发表时间:
    2018
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Yuko Hashimoto;Ken Yamamoto;KAMIYA Keisuke
  • 通讯作者:
    KAMIYA Keisuke

KAMIYA Keisuke的其他文献

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{{ truncateString('KAMIYA Keisuke', 18)}}的其他基金

Development of the vibration analysis system for structures with breathing cracks by the local boundary integral meshless method
局部边界积分无网格法呼吸裂缝结构振动分析系统的开发
  • 批准号:
    19560229
  • 财政年份:
    2007
  • 资助金额:
    $ 2.24万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)

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