Abstract
In this research, the effectiveness of higher order spectral analysis is presented for vibration system with viscous damping and Coulomb friction characteristics. First, we approximated the Coulomb friction characteristics. Coulomb friction characteristics were approximated by using "sigmoid function". Representation of many attenuation characteristics including “one-side” damping is possible. And, we modeled the power polynomial in velocity in the damping characteristics combined viscous damping and approximated Coulomb friction. Finally, the higher order frequency response function was defined using Higher Order Spectra (HOS), “Bispectrum” and “Trispectrum”. We formulated high frequency response function in nonlinear attenuation characteristics and numerical simulation analysis and presented the effectiveness of these.
