磁橡胶约束阻尼处理的激励力有效区域研究

Study on the Effective Region of Excitation Force of Magnetic Rubber Layer Damping Treatment

着重分析磁橡胶约束阻尼处理方法(MRLD)的阻尼效果受激励力影响的原因。基于MRLD与传统约束阻尼处理(PCLD)不同的耗能机制,得到这两种阻尼处理方式下系统耗能量的比值,进而估算MRLD相比PCLD,其阻尼改进效果中存在的激励力有效区域的大致范围。研究表明,材料损耗因子b不仅决定激励力有效区域的范围,同时也决定MRLD所能达到的阻尼改进效果的最优值。

The reason that the damping performance of magnetic rubber layer damping treatment （MRLD） depends on the force excitation has been analyzed. Analyzing the different dissipation energy mechanisms between MRLD and the passive constrained layer damping treatment （PCLD）, the ratio of dissipation energy of MRLD to dissipation energy of PCLD was obtained. And the effective range of exciting force, in which MRLD achieves better damping than PCLD, was estimated. The results show that the material loss factor has a decisive influence not only on the effective range, but also on the best damping improvement of MRLD.