Nonlinear Parameter Identification of Spindle holder Interface by Nonparametric Identification Technique and Finite Element Method

Abstract:

Based on nonparametric identification technique and finite element method, a nonlinear dynamic parameter identification method for spindle-holder interface is presented, in which the double contact parts between spindle and holder is considered as a nonlinear element descripting by system state variables. A finite element model of spindle holder system is constructed by HyperMesh，and its nonlinear transient response analysis is conducted using Radioss solver. With Newton's second law of motion，the time history data of nonlinear contact force of the interface then be deduced. Least square estimates with the Chebyshev polynomial basis is employed to approximate the sample data, and an analytic model of the nonlinear contact force of the interface is obtained.