气动应变能蓄能器充放气动态特性仿真与实验分析

气动应变能蓄能器是一种能量储存与供给装置,充气膨胀时以拉伸橡胶材料的应变能和压缩空气能的形式储存能量。影响储能的因素主要是橡胶材料的应变和装置内气体的压力。基于有限元分析软件,采用流固耦合方法模拟橡胶气囊充放气过程,获得不同充气流量、橡胶气囊壁厚、刚性护罩内径下橡胶气囊的膨胀压力、膨胀体积和储能特性。最后,基于所搭建的应变能蓄能器充放气试验台,进行了不同工况下蓄能器的压力和能量性能测试。结果表明,该蓄能器特性仿真分析方法是有效和正确的,为指导气动应变能蓄能器定量设计奠定了良好的基础。

Simulation and Experimental Analysis on Charging/Discharging Dynamic Characteristics of a Pneumatic Strain Energy Storage Device

The pneumatic strain energy accumulator is an energy storage and supply device that stores energy in the form of strain energy of the stretched rubber material and pressure energy during inflation. Factors affecting energy storage are mainly the strain of the rubber material and the pressure of the air inside the device. Based on a finite element analysis software, the fluid-structure coupled method was used to simulate the charging/discharging process of a rubber airbag , expansion pressure, expansion volume and energy storage characteristics of rubber airbag under different inflation flow rates, rubber airbag wall thickness and inner diameter of rigid shield were obtained. Finally, based on the built-in strain energy accumulator charging/discharging test rig, pressure and energy performance test of the accumulator under different working conditions were carried out. Experimental results showed that the simulation analysis method proposed in this paper was effective and correct, which laid a good foundation for guiding the quantitative design of pneumatic strain energy accumulator.