This paper investigated the benefits of vibration performance of diesel generator set (D/G-set) employing a kind of novel anti-vibration structure known as an inerter-rubber vibration isolator. We designed this vibration isolator in parallel with a rubber-part and a ball-screw inerter. Based on the inerter-rubber vibration isolator, the vibration system of an existing D/G-set (5DK-20) was built, and then the natural frequencies and vibration intensity of this D/G-set were analysed. The results show that the natural frequencies and the vibration intensity were both reduced employing inerter-rubber vibration isolators. Moreover, the anti-vibration performance of this D/G-set can be improved by more than 30% when the inertance-mass ratio is greater than 0.5. Therefore, the anti-vibration performance of the D/G-set can be significantly improved employing inerter-rubber vibration isolator. This work provides a new direction for vibration isolation design of power machinery, especially for the marine high-power low-speed D/G-set, which has practical engineering significance.

本文研究了采用一种称为惰性橡胶隔振器的新型抗振结构的柴油发电机组（D/G 组）的振动性能优势。我们设计了这种与橡胶部件和滚珠丝杠惰化器平行的隔振器。以惰性橡胶隔振器为基础，搭建了现有D/G-set（5DK-20）的振动系统，分析了该D/G-set的固有频率和振动强度。结果表明，采用惰性橡胶隔振器后，固有频率和振动强度均降低。此外，当惯性质量比大于0.5时，该D/G-set的抗振性能可提高30%以上。所以，使用惰性橡胶隔振器可以显着提高D/G-set的抗振性能。该工作为动力机械的隔振设计提供了新的方向，特别是对船用大功率低速D/G-set具有实际工程意义。