| 移动质量法结合分形维数的旋转梁损伤检测 |
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| 引用本文： | 韩伟,毛崎波,田文昊.移动质量法结合分形维数的旋转梁损伤检测[J].航空工程进展,2019,10(1):116-123. |
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| 作者姓名： | 韩伟 毛崎波 田文昊 |
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| 作者单位： | 南昌航空大学飞行器工程学院,南昌,330063;南昌航空大学飞行器工程学院,南昌,330063;南昌航空大学飞行器工程学院,南昌,330063 |
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| 基金项目： | 国家自然科学基金项目（11464031，51265037），航空科学基金项目（2015ZA56002） |
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| 摘 要： | 旋转梁结构广泛应用于航空工程领域,其健康状况直接关系着航空器的飞行安全,对旋转梁结构进行损伤检测能够及时发现损伤,从而避免因结构损伤而造成的重大损失。以变截面旋转裂纹梁为研究对象,通过移动质量法结合分形维数理论进行损伤检测。首先建立质量块-裂纹梁模型,计算得到固有频率随质量块位置变动曲线;然后运用分形维数理论得到固有频率曲线的分形维数曲线,进而识别出梁的损伤位置及其损伤程度;最后讨论裂纹位置、损伤程度、附加质量块大小以及转速对损伤检测的影响。结果表明:所提出的将移动质量法与分形维数理论相结合来进行损伤检测的方法,能够准确地识别损伤位置,还能够定性地反映出损伤程度。
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| 关 键 词： | 旋转裂纹梁 移动质量法 分形维数 损伤检测 |
| 收稿时间： | 2018/5/6 0:00:00 |
| 修稿时间： | 2018/5/18 0:00:00 |
Damage Detection for Rotating Beams by Using Auxiliary Mass Approach Combined with Fractal Dimension Method |
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| Han Wei,MAO Qi-bo and TIAN Wen-hao.Damage Detection for Rotating Beams by Using Auxiliary Mass Approach Combined with Fractal Dimension Method[J].Advances in Aeronautical Science and Engineering,2019,10(1):116-123. |
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| Authors: | Han Wei MAO Qi-bo and TIAN Wen-hao |
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| Institution: | Nanchang Hangkong University,Nanchang Hangkong University,Nanchang Hangkong University |
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| Abstract: | Taking variable-section rotating cracked beam as an example, the damage identification based on auxiliary mass method combined with fractal dimension theory. Firstly, the mass-crack beam model is established, and the natural frequency curve is calculated with the mass position changing. Then the fractal dimension curve of natural frequency curve is obtained by using fractal dimension method, and the location and depth of the crack can be detected. Futhermore, the effects of crack position, crack depth, auxiliary mass and rotating speed are investigated in detail. The simulation results demonstrate the efficiency and accuracy of the proposed method. |
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| Keywords: | rotating cracked beams auxiliary mass method fractal dimension damage detection |
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