| 基于有限元模型单一开裂纹转子的振动分析与无损估计 |
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| 引用本文： | 邹剑,陈进,董广明. 基于有限元模型单一开裂纹转子的振动分析与无损估计[J]. 机械工程学报, 2004, 40(7): 29-33 |
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| 作者姓名： | 邹剑 陈进 董广明 |
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| 作者单位： | 上海交通大学振动、冲击、噪声国家重点实验室,上海,200030;上海交通大学振动、冲击、噪声国家重点实验室,上海,200030;上海交通大学振动、冲击、噪声国家重点实验室,上海,200030 |
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| 基金项目： | 国家973重点基础研究规划(G1998020321)，国家自然科学基金(10176014)，振动、冲击、噪声国家重点实验室开放基金(VSN-2002-03)资助项目。 |
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| 摘 要： | 基于局部柔度理论和传递矩阵分析，给出一种简化的裂纹转子有限元模型。数值仿真研究了转子的长径比、裂纹位置以及裂纹深度对停机状态单一开裂纹转子的特征频率和振型的影响。提出一种借助裂纹转子前两阶特征频率和一阶振型对转子进行无损估计的新方法，仿真算例验证了该方法的有效性和可行性。
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| 关 键 词： | 有限元模型 裂纹转子 无损估计 长径比 裂纹深度 裂纹位置 |
| 修稿时间： | 2003-05-20 |
VIBRATION ANALYSIS AND NON-DESTRUCTIVE EVALUATION OF A ROTOR WITH AN OPEN CRACK VIA FINITE ELEMENT MODEL |
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| Zou Jian Chen Jin Dong Guangming. VIBRATION ANALYSIS AND NON-DESTRUCTIVE EVALUATION OF A ROTOR WITH AN OPEN CRACK VIA FINITE ELEMENT MODEL[J]. Chinese Journal of Mechanical Engineering, 2004, 40(7): 29-33 |
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| Authors: | Zou Jian Chen Jin Dong Guangming |
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| Affiliation: | State Key Laboratory of Vibration, Shock & Noise, Shanghai Jiaotong University |
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| Abstract: | A simplified finite element model for cracked rotor is presented, which is based on local flexibility theorem and transfer matrix analysis. By numerical simulation, the effects of the slenderness ratio, the crack depth and location on the changes in eigenfrequencies and mode shapes for a static (non-rotating) rotor with an open crack are investigated. A new non-destructive evaluation algorithm that uses the first two normalized eigenfrequencies and two translations of the first mode shape to predict the crack parameters is proposed, and an illustrative example demonstrates the validity and feasibility of the proposed algorithm. |
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| Keywords: | Finite element model Cracked rotorNon-destructive evaluation Slenderness ratio Crack depth Crack location |
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