Chinese Journal of Theoretical and Applied Mechani ›› 2013, Vol. 45 ›› Issue (1): 116-128.DOI: 10.6052/0459-1879-12-174

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RESEARCH OF DYNAMIC EXPERIMENTAL MODELING FOR NONLINEAR STRUCTURE UNDER PARAMETRIC AND FORCED EXCITATION

Zhu Chenzhong, Ye Min   

  1. School of Aeronautics and Astronautics, Zhejiang University, Hangzhou 310027, China
  • Received:2012-06-07 Revised:2012-07-18 Online:2013-01-23 Published:2013-01-31
  • Supported by:
    The project was supported by the National Natural Science Foundation of China (10672141).

Abstract: Incremental harmonic balance nonlinearity identification (IHBNID) method has already been applied to the experimental modeling method for single-degree-of-freedom dynamical equation and shows reasonable match between numerical simulation and experimental system. This paper aims to apply the IHBNID to multi-degree-of-freedom nonlinear parametric and forced excitation vibration system. So the experimental platform of L-shape beam system is set up and the dynamical equation of the beam is built with the experimental modeling method and the IHBNID. The result of numerical simulation shows fairly good compatibility with experimental system on qualitative and quantitative aspects. This theory including experimental modeling method and the IHBNID demonstrates that it also can be applied to experimental systems with variable frequencies and motions, such as the period-doubling motion.

Key words: parametric vibration|L-shape beam|experimental modeling|incremental harmonic balance|multi-degreeof- freedom nonlinear system

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