Engineering Mechanics ›› 2018, Vol. 35 ›› Issue (S1): 1-5,12.doi: 10.6052/j.issn.1000-4750.2017.05.S002

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Two-dimensional wing flutter frequency calculation method based on bending torsion coupling theory

ZHENG Xin1, LIU Yu-bin1, CHEN Pu2, SHEN Feng3, ZHANG Sheng-jun3, FU Xiang-rong1   

  1. 1. College of Water Conservancy and Civil Engineering, China Agricultural University, Beijing 100083, China;
    2. College of Engineering, Peking University, Beijing 100871, China;
    3. State Power Investment Corporation Central Research Institute, Beijing 102209, China
  • Received:2018-01-03 Revised:2018-03-12 Online:2018-06-30 Published:2018-07-11

Abstract: Based on the frequency superposition theory calculation method, a forecast method of flutter frequency is established and verified by the following two models:1) The first group of models are a homogeneous trapezoidal plate with a sweep angle as a single variable. A chatter frequency calculation method is proposed, the correlation between flutter modes and bending-torsional coupling modes under different sweep angles is discussed, and the results' accuracy is identified. 2) The second group models are a rectangular cantilever plate with a single layer orientation as a single variable, the flutter parameters regularity is developed, and the chatter frequency of a composite sheet is examined. This method provides a reference for the composite wing design and internal mechanism of chatter problems.

Key words: frequency coincidence theory, vibration mode, flutter frequency, sweep angle, layer angle

CLC Number: 

  • U215.3+4
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