橡胶表面波减隔振机理及特性研究

Study on the mechanism and characteristics of vibration isolation and reduction via rubber surface waves

  • 摘要: 针对船舶设备振动低频连续谱减隔振难题,提出了一种基于表面波能量衰减的基座结构减振方法。以橡胶‑玻璃钢耦合振动系统为例,基于有限元法分析了橡胶表面波效应的减振特性,探究了橡胶厚度、杨氏模量、阻尼系数等参数对表面波减振特性的影响规律,并开展了橡胶表面波减振特性试验,验证该减振方法的有效性。研究结果表明:表面波效应具有良好的减振效果,且在高频效果更为显著;表面波减振效果随介质厚度的增加而增强,但并非完全正相关;随着介质杨氏模量的减小,减振效果显著增强;增大阻尼有利于表面波减振效果的提升;与全覆盖橡胶层相比,在隔振基础上局部覆盖橡胶层具有更优的减振效果。

     

    Abstract: In response to the challenging issue of low-frequency continuous spectrum reduction and isolation of ship equipment vibration, a vibration reduction method based on surface wave energy attenuation is proposed. Taking the rubber-fiberglass composite vibration system as an example, the damping characteristics of rubber surface waves are calculated using the finite element method. The influence of parameters such as thickness, damping coefficient, and Young’s modulus on surface wave attenuation is preliminarily explored. Experimental tests on rubber surface wave attenuation are conducted to validate the effectiveness of the surface wave attenuation method. The results demonstrate that the surface wave effect has a good vibration reduction performance, especially at high frequencies. The surface wave attenuation effect strengthens with increasing medium thickness, but not in a completely positive correlation. Reduction of the medium’s elastic modulus enhances the attenuation effect noticeably. Increasing damping is beneficial for surface wave attenuation. Compared to full-coverage rubber layers, local coverage of rubber layers on top of the isolating foundation provides better vibration reduction benefits.

     

/

返回文章
返回