Composite pipeline vibration suppression device with adjustable frequency

The frequency-adjustable composite pipeline vibration suppression device is used for suppressing transmission of vibration along the pipeline, has the functions of controlling line spectrum and broadband vibration, is convenient to use and wide in frequency adjusting range, and can achieve a good control effect when the vibration amplitude of the pipeline is low. The frequency-adjustable composite pipeline vibration suppression device comprises a hoop and more than one mass block, the hoop is used for tightly holding a controlled pipeline; the mass block is connected with the hoop through the cantilever beam; the length of the cantilever beam is adjustable so as to change the rigidity of the mass block and enable the frequency of the mass block to be adjustable; the mass block is filled with particle dampers. 本发明提供一种频率可调的复合管路抑振装置，用于抑制振动沿管路的传递，兼具线谱和宽频振动控制功能，使用方便、频率调节范围广，在管路振动幅值低时也可取得较好的控制效果。该频率可调复合管路抑振装置包括：卡箍和一个以上质量块；所述卡箍用于抱紧被控管路；所述质量块通过悬臂梁与所述卡箍相连；所述悬臂梁长度可调，以改变质量块刚度，使其频率可调；所述质量块内部填充有颗粒阻尼。