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。
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.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2004年第7期29-33,共5页
Journal of Mechanical Engineering
基金
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。
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
Finite element model Cracked rotorNon-destructive evaluation Slenderness ratio Crack depth Crack location
