磁流变液在磁场作用下具有液固相互转换及阻尼可变的特殊理化性质。在振动控制领域，目前主要应用其阻尼可变特性。实际上，液固转换过程，也就是振动传递阻抗变化的过程。因此，提出了通过调整控制磁场强度，利用磁流变液的液固两相转换性质，构成阻抗分层连续调制结构，从而对磁流变液调制得到的各种阻抗构型及其组合的振动传递特性进行全面系统的研究。.本课题将重点研究下列问题：.1.研究磁流变液分层调制形成的各种阻抗周期分布结构对振动传递的影响及其损耗机理。.2.研究磁流变液分层调制形成的各种阻抗准周期分布结构（各种周期结构的组合）的振动传递带宽及通禁带构成机理。.3.通过实验观测磁流变液分层调制形成的各种阻抗按特定波形结构及参数分布的振动传输数据，研究对比不同阻抗分布模式下振动传输损耗机理及参数影响，探索振动传输损耗敏感构型。.对这些关键问题的研究将为磁流变智能材料在振动控制领域新的发展与应用做出探索。

Magnetorheological fluid (MRF) has special physicochemical properties of liquid-solid transformation and variable damping under magnetic field. In the field of vibration control, MRF has been applied mainly considering its variable-damping property. More specifically, the process of conversion between solid and liquid is namely the change of vibration-transferimpedance. Therefore we come up with an idea that, by controlling the magnetic field strength, the liquid-solid two-phase transformation property of MRF can be utilized to form a structure which can continuously modulate vibration-transfer impedance in each layer. Consequently, a complete and systematic research can be done on vibration transmissibility of various impedance configurations, modulated by MRF, and their combination..This topic will focus on researching and solving the following issues:.(1) To research how various impedance period distribution structures, which is hierarchically modulated by MRF, influence the vibration transmission and its vibration-dissipative mechanism..(2) To research the bandwidth of vibration transmissibility and the formation mechanism of pass/stop band of various impedance quasi-periodic distribution structures (namely the combination of different periodic structures), which is hierarchically modulated by MRF..(3) To conduct vibration transmission experiment on structures, which are formed by MRF and modulated with special waveform and parameters, then observe the experimental data and compare the effect, produced by different impedance distribution configurations, on vibration transmission loss to explore an optimized configuration which is sensitive to vibration transmission loss..The research on these key issues will provide a guide for the new development and application of magnetorheological smart materials in the field of vibration control.