Complex Modal Analysis for the Time-Variant Dynamical Problem of Rotating Pipe Conveying Fluid
作者: Lihua Wang and Zheng Zhong
刊名: CMES: Computer Modeling in Engineering & Sciences, 2018, Vol.114 (1), pp.1-18
来源数据库: Tech Science Press
DOI: 10.3970/cmes.2018.114.001
关键词: Semi-analytical formComplex modal analysisTime-variant dynamical problemRotating pipe conveying fluid.
原始语种摘要: A semi-analytical form of complex modal analysis is proposed for the time-variant dynamical problem of rotating pipe conveying fluid system. The complex mode superposition method is introduced for the dynamic analysis in the time and frequency domains, in which appropriate orthogonality conditions are constructed to decouple the time-variant equation of motion. Consequently, complex frequencies and modes of vibration are analytically formulated and the variations of frequencies and damping of the system are evaluated. Numerical time-variant example of rotating pipe conveying fluid illustrates the effectiveness and accuracy of this method. Furthermore, the proposed solution scheme is also applicable to other similar time-variant dynamical problems.
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  • analytically 分析上
  • modal 模态
  • dynamical 动力学的
  • variant 变体
  • conveying 搬运
  • complex 超群
  • effectiveness 有效性
  • Analysis 分析
  • motion 运动
  • orthogonality 正交