Applied Mathematics and Mechanics (English Edition) ›› 2001, Vol. 22 ›› Issue (8): 917-924.

• Articles • Previous Articles     Next Articles

1:2 INTERNAL RESONANCE OF COUPLED DYNAMIC SYSTEM WITH QUADRATIC AND CUBIC NONLINEARITIES

CHEN Yu-shu, YANG Cai-xia, WU Zhi-qiang, CHEN Fang-qi   

  1. Department of Mechanics, Tianjin University, Tianjin 300072, P. R. China
  • Received:2000-05-08 Revised:2001-03-15 Online:2001-08-18 Published:2001-08-18
  • Supported by:
    the National Natural Science Foundation of China(19990510);the National Key Basic Research Special Fund(G1998020316);the Doctoral Point Fund of Education Committee of China(D09901)

Abstract: The 1:2 internal resonance of coupled dynamic system with quadratic and cubic nonlinearities is studied. The normal forms of this system in 1:2 internal resonance were derived by using the direct method of normal form. In the normal forms, quadratic and cubic nonlinearities were remained. Based on a new convenient transformation technique, the 4-dimension bifurcation equations were reduced to 3-dimension. A bifurcation equation with one-dimension was obtained. Then the bifurcation behaviors of a universal unfolding were studied by using the singularity theory. The method of this paper can be applied to analyze the bifurcation behavior in strong internal resonance on 4-dimension center manifolds.

2010 MSC Number: 

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