| 基于有限元法叶片裂纹的诊断研究 |
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| 引用本文： | 丁镇军,纪国宜. 基于有限元法叶片裂纹的诊断研究[J]. 发电设备, 2011, 0(3): 166-168,179 |
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| 作者姓名： | 丁镇军 纪国宜 |
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| 作者单位： | 南京航空航天大学飞行器结构力学与控制教育部重点实验室,南京210016 |
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| 摘 要： | 在Ansys中建立了叶片模型,对裂纹叶片进行了动力学分析。结果表明,裂纹深度和位置对叶片固有频率影响很大。裂纹越深,固有频率越低;裂纹位置不变,叶片谐响应幅值随裂纹深度的增加而增加;裂纹深度一定时,叶片谐响应幅值随裂纹远离叶根而降低。这为叶片裂纹的监测与诊断提供了依据。
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| 关 键 词： | 叶片 固有频率 裂纹 谐响应 有限元法 |
Blade Crack Diagnosis Based on Finite Element Method |
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| DING Zhen-jun,JI Guo-yi. Blade Crack Diagnosis Based on Finite Element Method[J]. Power Equipment, 2011, 0(3): 166-168,179 |
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| Authors: | DING Zhen-jun JI Guo-yi |
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| Affiliation: | (MOE＇s Key Lab of Structure Mechanics and Control for Aircraft,Nanjing Universityof Aeronautics and Astronautics,Nanjing 210016,China) |
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| Abstract: | Blade models were built with ANSYS software,while dynamic analysis performed to blade cracks.Results show that the depth and location of a crack play an important role in influencing the natural frequency of the blade.The deeper the crack,the lower the natural frequency will be.For a crack at a fixed location,the amplitude of the blade＇s harmonic response grows with rising depth of the crack,while for a crack at a fixed depth,the amplitude drops with rising distance of the crack away from blade root.The results may serve as a reference for detection and diagnosis of blade cracks. |
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| Keywords: | blade natural frequency crack harmonic response finite element method |
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