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CHARACTERIZATION OF DYNAMICAL INSTABILITY USING INSTANTANEOUS FREQUENCY


Dynamical instability induced by the initiation and advancement of mechanical faults in rotary elements is detrimental to the reliability and operation safety of the entire system. The inherent nonlinearity associated with bifurcation presents itself as difficulties in identifying and isolating features indicative of the presence and progression of faults that could lead to eventual mechanical deterioration. The perturbed and deteriorated states of a bearing-shaft system subjected to the actions of two types of commonly seen mechanical faults, namely, rotor speed and imbalance, are investigated using the basic notion of instantaneous frequency. The presented approach realizes temporal events of both short and long time scales as instantaneous frequencies in the joint time-frequency domain and thus effectively uncouples the harmonic components resulted from the coupling of multitude faults. Examples are given to demonstrate the feasibility of applying the approach to the characterization of various deteriorating bearing states and the identification of parameters associated with various modes of instability and chaotic response.......

【作者名称】: Baozhong Yang, James Fisher, C. Steve Suh
【作者单位】: Department of Mechanical Engineering Texas A&M University College Station, Texas 77843-3123
【关 键 词】: CHARACTERIZATION OF DYNAMICAL INSTABILITY USING INSTANTANEOUS FREQUENCY
【会议名称】: 2002 ASME International Mechanical Engineering Congress and Exposition , Nov 17-22, 2002, New Orleans, Louisiana
【期刊论文数据库】: [DBS_Articles_01]
【期刊论文编号】: 101,087,004
【摘要长度】: 1,145
【会议地点】: New Orleans, LA(US);New Orleans, LA(US)
【会议组织】: Department of Mechanical Engineering Texas A&M University College Station, Texas 77843-3123
【会议时间】: 2002
【上篇论文】: 外文会议 - FREQUENCY EFFECTS ON GIGACYCLE FATIGUE PROPERTIES OF HIGH-STRENGTH STEELS
【下篇论文】: 外文会议 - Use of CFD in Design and Development of R404A Reciprocating Compressor

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