Study on the Characteristics of Gas Spring-Damping Modified Model Bladder-Damper Based on Dynamic Mesh Technology

Abstract

Abstract This paper addresses the existing difficulty in quantitatively analyzing and calculating the attenuation effect of a specific type of vibration control device, referred to as a “Bladder-Damper”. In response, a modified version of the “Gas Spring-Damping” model specifically tailored for this device has been proposed. Models involving both series and parallel connections have been established to support our work. Dynamic mesh technology has been used to simulate the damping characteristics of the Bladder-Damper, successfully resolving both finite element fluid calculation divergence issues and negative volume problems during dynamic mesh updating. By applying different pulse frequencies, dynamic simulations of the Bladder-Damper have been performed. The results demonstrate that our proposed modified model greatly reduces calculation errors associated with the traditional “Gas Spring-Damping” model. Interestingly, it has been noted that the damping effect on pressure pulsation is superior when using series dampers compared to parallel ones. The optimal attenuation effects occur when the frequency of fluid pulsation aligns with the resonance frequency of the damper, resulting in a maximum attenuation rate of up to 95%. The effectiveness and practicability of our simulation correction model have been confirmed since the simulation results align well with experimental outcomes. This establishes a new methodology and perspective for assessing the attenuation performance of the Bladder-Damper.