クロスバイスペクトルを用いた分数調波振動の評価

抄録

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 so-called 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 (HOS) and present the effectiveness of this method. In this report, following the previous report, we focus on the repulsion characteristics of the magnetic force, perform experimental analysis and numerical simulation analysis on the "magnetic spring" model with non-linear characteristics, and perform cross-bispectral analysis considering input and output Applied. While evaluating the subharmonic vibration, the effectiveness of this method is examined.