Identification Of Dynamic Parameters For The High-speed Winding Spindle Assembly Supporting System

High-speed winding machine is a key equipment in the production line of chemical fiber filament,and the spindle system is the core component of the high-speed winding machine.It rotates at high speed with the support of a flexible support system composed of rolling bearings and "O-ring" rubber rings.The variable speed and frequencydependent dynamic support parameters of the spindle result in complex dynamic behavior.Accurately configuring the dynamic parameters of the flexible support system is crucial to ensure the smooth operation of the spindle at critical speeds and under complex working conditions.This paper proposes an innovative method that combines simulation and experimentation to quickly obtain the dynamic parameters of the support system.Taking into account the characteristics of the high-speed winding spindle support,an experimental testing and simulation analysis scheme is designed based on the principle of forced non-resonance.Comparative analysis demonstrates the effectiveness of both approaches,with the simulation method offering advantages in flexible system parameter settings and cost savings.The main research work and achievements of this paper are as follows:(1)Analyzing the structural composition and working mechanism of the winding spindle system and establishing a CAE model of the support system.Based on the principle of forced non-resonance,an experimental testing scheme is designed,specifying the frequency range suitable for testing systems with certain structural parameters.(2)By obtaining the first-order natural frequency of the experimental testing system within the range suitable for forced non-resonance conditions,the equivalent support stiffness and equivalent support damping of the "O-ring" rubber rings and the flexible support system are determined.(3)Through experiments,the elastic modulus and damping factor of the "O-ring" rubber rings are obtained.A finite element model with the same structure as the experimental testing device is established.By adjusting the size of the vibrating mass and the first-order natural frequency of the system,the applicable range of forced nonresonance testing is expanded.The dynamic parameters of the flexible composite support system at the operating frequency of the spindle are obtained through simulation,exhibiting strong frequency-dependent characteristics within the spindle’s frequency range.(4)A system based on finite element simulation analysis is established to quickly obtain the dynamic parameters of the "O-ring" rubber rings.The elastic modulus of the "O-ring" rubber rings is linearized within the small deformation range.By utilizing the fitting relationship between the hardness and elastic modulus of the rubber material,a constitutive model of the rubber rings is established.Through finite element simulation analysis,parameter settings can be easily adjusted,making it more economical and convenient to obtain dynamic parameters.