金属丝网橡胶减振器冲击响应有限元仿真研究

Finite element simulation on shock response of metal-net rubber damper

为了研究金属丝网橡胶材料冲击特性,本文在金属丝网橡胶减振器冲击试验的基础上,结合金属丝网橡胶的非线性干摩擦迟滞力学特性,提出一种金属丝网橡胶减振器冲击有限元仿真方法。采用COMBI165弹簧阻尼单元模拟金属丝网橡胶材料,赋予弹簧单元非线性本构曲线模拟金属丝网橡胶材料的非线性刚度,利用ANSYS LSDYNA对其进行冲击响应仿真研究,并对仿真误差产生的原因和冲击仿真方法的适用性进行讨论分析。将仿真结果与试验结果进行对比发现,利用所提出的有限元仿真方法计算得到的结果与试验结果吻合较好,可以较好的模拟金属丝网橡胶减振器的冲击力学行为,为金属丝网橡胶减振器抗冲击设计及工程应用提供参考。

In order to study the impact characteristics of metal-net rubber material,based on the shock experiment of metal-net rubber damper and in combination with the mechanical properties of metal-net rubber including nonlinearity,dry friction and hysteresis,the paper proposed a finite element simulation method on the shock response of metal-net rubber demper.COMBI165 spring damping element was used to simulate metal-net rubber material,the spring element was endowed with nonlinear constitutive curve to simulate the nonlinear stiffness of the metal-net rubber material.ANSYS LS-DYNA was utilized to carry out a simulative research for the shock response,in addition,the reasons causing simulation errors and the applicability of the impact simulation method were discussed and analyzed.The simulation results was compared with the experimental results and it was found that both results are well in agreement,the proposed method can well simulate the impact mechanics behavior of metal-net rubber shock absorber,the results can provide a reference for the shock resistance design and engineering application of metal-net rubber shock absorber.