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一种利用振动响应非线性估计的叶片裂纹定位方法

蒋勉 张文安 伍济钢 王文韫

蒋勉, 张文安, 伍济钢, 王文韫. 一种利用振动响应非线性估计的叶片裂纹定位方法[J]. 机械科学与技术, 2018, 37(4): 545-552. doi: 10.13433/j.cnki.1003-8728.2018.0409
引用本文: 蒋勉, 张文安, 伍济钢, 王文韫. 一种利用振动响应非线性估计的叶片裂纹定位方法[J]. 机械科学与技术, 2018, 37(4): 545-552. doi: 10.13433/j.cnki.1003-8728.2018.0409
Jiang Mian, Zhang Wenan, Wu Jigang, Wang Wenyun. A Crack Location Method for Blades Via Nonlinearity Estimation of Vibration Response[J]. Mechanical Science and Technology for Aerospace Engineering, 2018, 37(4): 545-552. doi: 10.13433/j.cnki.1003-8728.2018.0409
Citation: Jiang Mian, Zhang Wenan, Wu Jigang, Wang Wenyun. A Crack Location Method for Blades Via Nonlinearity Estimation of Vibration Response[J]. Mechanical Science and Technology for Aerospace Engineering, 2018, 37(4): 545-552. doi: 10.13433/j.cnki.1003-8728.2018.0409

一种利用振动响应非线性估计的叶片裂纹定位方法

doi: 10.13433/j.cnki.1003-8728.2018.0409
基金项目: 

国家自然科学基金项目(51775182,51775181,51605157)资助

详细信息
    作者简介:

    蒋勉(1983-),副教授,博士,研究方向为机械动力学,机器视觉测振方法。mjiang@cvm.ac.cn

A Crack Location Method for Blades Via Nonlinearity Estimation of Vibration Response

  • 摘要: 对叶片裂纹进行准确定位,对于实现准确维修延长其工作寿命具有重要的意义。针对叶片裂纹定位问题,提出一种高频激励下利用多位置点振动响应非线性估计的叶片裂纹定位方法,并给出了系统非线性估计的定义和相应的计算方法。在叶片上多位置特征点采集非线性振动信号组成矩阵形式信号,再利用正交分解方法求解其线性近似矩阵信号,通过量化两者之间的误差得到叶片各点振动响应信号的非线性程度估计值。计算相同激励输入下健康状态和含裂纹叶片各点振动响应非线性度估计值的误差,寻找误差绝对值最大点实现裂纹的准确定位。通过在有限元软件中建立健康和含裂纹损伤的叶片有限元模型,在多种激励频率下进行瞬态动力学仿真验证,分析结果表明该方法具有很好的裂纹定位效果。
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出版历程
  • 收稿日期:  2017-04-06
  • 刊出日期:  2018-04-05

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