A Hybrid Simulation-Experimental Method for Deriving Equivalent Dynamic Parameters of O-Ring Support Systems

Abstract

The high-speed winding spindle employs a flexible support system incorporating rubber O-rings. By precisely configuring the structural parameters and the number of the O-rings, the spindle can stably surpass its critical speed points and maintain operational stability across the entire working speed range. However, the support stiffness and damping of rubber O-rings exhibit significant nonlinear frequency dependence. Conventional experimental methods for deriving equivalent stiffness and damping, based on the principle of the forced non-resonance method, require fabricating custom setups for each O-ring specification and conducting vibration tests at varying frequencies, resulting in low efficiency and high costs. This study proposes a hybrid simulation-experimental method for dynamic parameter identification. Firstly, the frequency-dependent dynamic parameters of a specific O-ring support system are experimentally obtained. Subsequently, a corresponding parametric finite element model is established to simulate and solve the equivalent elastic modulus and equivalent stiffness-damping coefficient of this O-ring support system. Ultimately, after iterative simulation, the simulated and experimental results achieve a 99.7% agreement. The parametric finite element model developed herein can directly simulate and inversely estimate frequency-dependent dynamic parameters for O-rings of different specifications but identical elastic modulus.

Keywords

O-ring / equivalent dynamic parameter / forced non-resonance method / inverse parameter estimation / dynamic simulation

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Funding

National Key R&D Program of China(2017YFB1304000)

Fundamental Research Funds for the Central Universities, China(2232023G-05-1)