Applied Mathematics and Mechanics (English Edition) ›› 2003, Vol. 24 ›› Issue (9): 1089-1099.

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VISCO-ELASTIC SYSTEMS UNDER BOTH DETERMINISTIC AND BOUND RANDOM PARAMETRIC EXCITATION

XU Wei1, RONG Hai-wu2, FANG Tong 3   

  1. 1. Department of Applied Mathematics, Northwestern Polytechnical University, Xi'an 710072, P. R. China;
    2. Department of Mathematics, Foshan University, Foshan, Guangdong 528000, P. R. China;
    3. Institute of Vibration Engineering, Northwestern Polytechnical University, Xi'an 710072, P. R. China
  • Received:2001-12-12 Revised:2003-04-23 Online:2003-09-18 Published:2003-09-18
  • Supported by:

    the National Natural Science Foundation of China (10072049)

Abstract: The principal resonance of a visco-elastic systems under both deterministic and random parametric excitation was investigated. The method of multiple scales was used to determine the equations of modulation of amplitude and phase. The behavior, stability and bifurcation of steady state response were studied by means of qualitative analysis. The contributions from the visco-elastic force to both damping and stiffness can be taken into account. The effects of damping, detuning, bandwidth, and magnitudes of deterministic and random excitations were analyzed. The theoretical analysis is verified by numerical results.

2010 MSC Number: 

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