中文摘要：

浸没于水中的粗颗粒管道输送系统,由于受到泵、内部两相流及外部流体三者的耦合激励,管道系统振动将对管道输送参数和安全稳定性产生严重影响。为了深入分析水下管道输送系统工作时振动的特性,设计了一套振动测试,对管道系统振动进行了测试,获取管道在不同工况下的时域波形,通过快速傅里叶变换对振动信号进行频谱分析。试验结果表明：随着输送体积浓度增加,X与Y方向的最大振动幅度随着体积浓度增大而增大,但是Z方向的最大振动幅度则是随着体积浓度增加而降低;同一输送浓度情况下,Y方向振动幅度最大,X方向次之,Z方向最小;随着输送浓度提高,流体紊流引起的管道振动加剧。这些结论将为深海采矿管道支撑结构设计和减振提供参考。

英文摘要：

The vibrations of the pipeline system for transporting coarse particles immersed in the water due to these excitations coupling among the pump and the internal and the external fluid piping pipeline vibrations will cause serious harm to the pipeline＇ s stability and safety. In order to deeply analyze the vibration＇ s characteristics under the operation of the underwater pipeline system, a vibration test system was designed and tested . The pipeline＇ s time-domain waveform and signal spectrums by means of the fast Fourier transform under different conditions were analyzed. The results indicated that： with the increase in transporting volume concentrations, the maximum vibration amplitudes in the X and Y directions went up, but the maximum vibration amplitude in the Z direction reduced; With transporting the same concentrations, the vibration amplitude in the Y direction was the greatest in three directions, X was greater than the vibration direction, the vibration amplitude in the X direction is greater than that in the Z direction; as the volume concentration increase, amplitudes and frequencies of flow turbulent vibration will be erratic, sometimes pulsating widely. These conclusions will supply references to future designs of supporting structure and vibration control for deep-sea mining pipelines.