在某型船用管道泵小型化、高速化的改型后，泵内流动引起的水力激励问题愈发突出。为降低泵组振动，采用非阻尼微颗粒阻尼技术(NOPD技术)在泵组进出口段增加轴向和径向离散分布的空腔用来填充阻尼颗粒，并对不同填充率以及不同密度颗粒进行对比分析，结果表明：NOPD技术针对水力激励引起的高频宽带谱有很好的抑制作用，对低频减振效果不佳。颗粒阻尼在80%填充率减振效果最好，且随着质量比的增大而增大。钨颗粒在80%填充率下，总振级轴向振动降低10.3dB,径向振动降低11.6dB。NOPD技术对管道泵组起到了很好的减振效果。

After the miniaturization and high-speed modification of a certain type of marine pipeline pump, the hydraulic excitation problem caused by the flow inside the pump has become increasingly prominent. To reduce the vibration of the pump group, non-obstructiveparticle damping(NOPD technology) is used to add axially and radially discrete cavities at the inlet and outlet sections of the pump group to fill with damping particles. Different filling rates and particle densities are compared and analyzed, and the following conclusions are drawn: NOPD technology has a good suppression effect on high-frequency broadband spectra caused by hydraulic excitation, but has poor low-frequency vibration reduction effect. Particle damping has the best vibration reduction effect at 80% filling rate, and increases with the increase of mass ratios. At 80% filling rate, tungsten particles reduce the total axial vibration by 10.3dB and the radial vibration by 11.6dB. NOPD technology has a good vibration reduction effect on pipeline pump sets.

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