Subharmonic and harmonic vibration analysis using cross bispectrum (About the Use of the JSME Specification Template File)

Abstract

Many phenomena existing in mechanical structures have nonlinear characteristics such as play and friction, the response characteristic of the vibration system subjected to random input is a socalled non-gaussian random process. For the handling of these data, it is essential to apply statistical methods and analyze using higher-order statistics considering non-gaussian. The purpose of this research is to apply statistical method in higher-order frequency response analysis in asymmetric nonlinear vibration system using higher-order spectra and present the effectiveness of this method. In this report, following the previous report, we understood the vibration characteristics by modifying the restoring force characteristics and damping characteristics of the magnetic spring model. In addition, we carried out experimental analysis and numerical simulation , and applied cross-bispectral analysis to understand the mutual transfer characteristics of nonlinear systems considering input and output. The subharmonic and higher harmonic vibrations caused by the nonlinear vibration characteristics were evaluated and the effectiveness of this method was examined.