According to the theory of phononic crystals (PCs), the hydraulic pipe was designed to be a periodic structure which is composed of steel pipe and hose. The vibration of hydraulic system was suppressed by using the characteristics of band gaps (BGs) of the periodic pipe. The band structure and FRF of the periodic pipe was calculated by the transfer method and finite element method (FEM), respectively. And the effects of pressure and viscosity on the flexural BGs of periodic pipe were studied deeply. The results show the periodic pipe has vibration BGs below 1 000 Hz, and it can suppress the vibration of the hydraulic system effectively. Transmission of flexural vibration of hydraulic pipe can be suppressed effectively. The BGs of the periodic pipe is increased with the increasing of the fluid pressure, but the effect of viscosity on the BGs is limited. The study provides an effective new technical way to control the vibration of hydraulic system.
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刘东彦,李发,张建兴,李宝仁.流体特性对周期管路弯曲振动带隙的影响[J].机床与液压,2016,44(21):74-77. . Effects of Fluid Property on Flexural Vibration Band Gap of Periodic Pipe[J]. Machine Tool & Hydraulics,2016,44(21):74-77