填充阻尼块网孔式弹性垫板力学参数影响研究

Study on the influence of mechanical parameters of mesh-type elastic pad filled with damping blocks

为了提高网孔式弹性垫板的阻尼,对填充平面型阻尼块网孔式弹性垫板进行结构优化,得到阻尼性能更好的曲面型阻尼块网孔式弹性垫板。在保证材料参数和尺寸参数一致的情况下,研究填充曲面型阻尼块网孔式弹性垫板的倒角半径、网孔间距和网孔衍生方式对其静刚度和阻尼比特性的影响规律,并将其与普通网孔式弹性垫板和填充平面型阻尼块网孔式弹性垫板进行对比。研究结果表明:增大填充曲面型阻尼块网孔式弹性垫板的倒角半径,其静刚度和阻尼比均会随之增大;网孔间距的增大会使填充平面型阻尼块网孔式弹性垫板的静刚度增大,阻尼比则随之减小。不同的网孔衍生方式对填充平面型阻尼块网孔式弹性垫板的静刚度和阻尼比影响不大,但边平行网孔衍生方式可以有效地降低弹性垫板本体和阻尼块的整体应力水平。同时,2种填充阻尼块网孔式弹性垫板在刚度一致的情况下,填充曲面型阻尼块网孔式弹性垫板具有更好的阻尼特性,且其应力水平更小,在提高减振性能的同时也延长了弹性垫板的使用寿命。该弹性垫板相比于填充平面型阻尼块网孔式弹性垫板更节省材料,有利于降低生产成本。

In order to improve the damping of the mesh-type elastic pad,the structure of the mesh-type elastic pad filled with flat damping blocks was optimized to obtain a curved damping block mesh elastic-type pad with better damping performance.Under the condition that the material parameters and size parameters are consistent,the influences of the chamfer radius,mesh spacing and mesh derivation method on the static stiffness and damping ratio characteristics of the filled curved damping block mesh-type elastic pad were studied.This new product was also compared with the ordinary mesh-type elastic pad and the filled flat damping block mesh-type elastic pad.The results show that increasing the chamfer radius of the mesh-type elastic pad of the filled curved damping block increases its static stiffness and damping ratio.The increasing mesh spacing increases the mesh-type elasticity of the filled flat damping block.As the static stiffness of the backing plate increases,the damping ratio decreases accordingly.Different mesh derivation methods have little effect on the static stiffness and damping ratio of the mesh-type elastic pad filled with flat damping blocks,but the parallel mesh derivation method can effectively reduce the overall stress level of the elastic pad body and the damping block.Meanwhile,when the rigidity of the two filled damping block mesh-type elastic pads remains identical,the filled curved damping block mesh-type elastic pad exhibits better damping characteristics,and its stress level is lower.This not only improves the vibration damping performance but also prolongs the service life of the elastic pad.As compared to the mesh-type elastic pad filled with planar damping blocks,the elastic pad saves more materials and is thus beneficial for reducing the production cost.