胡泽超, 徐伟, 李正民. 船用推力轴承整体减振系统振动传递特性研究[J]. 中国舰船研究, 2020, 15(3): 143-148. DOI: 10.19693/j.issn.1673-3185.01535
引用本文: 胡泽超, 徐伟, 李正民. 船用推力轴承整体减振系统振动传递特性研究[J]. 中国舰船研究, 2020, 15(3): 143-148. DOI: 10.19693/j.issn.1673-3185.01535
HU Zechao, XU Wei, LI Zhengmin. Study on vibration transmission characteristics of integrated vibration isolation system for marine thrust bearings[J]. Chinese Journal of Ship Research, 2020, 15(3): 143-148. DOI: 10.19693/j.issn.1673-3185.01535
Citation: HU Zechao, XU Wei, LI Zhengmin. Study on vibration transmission characteristics of integrated vibration isolation system for marine thrust bearings[J]. Chinese Journal of Ship Research, 2020, 15(3): 143-148. DOI: 10.19693/j.issn.1673-3185.01535

船用推力轴承整体减振系统振动传递特性研究

Study on vibration transmission characteristics of integrated vibration isolation system for marine thrust bearings

  • 摘要:
      目的   采用推力轴承整体减振技术可改变推进轴系的纵振传递路径,衰减螺旋桨传递至船体的振动能量,从而实现降噪的目的。
      方法   为掌握螺旋桨不同方向激励力的传递规律,建立桨-轴-船体的数值分析模型,分析螺旋桨纵向和横向单位激励力作用下系统的振动传递特性,对比推力轴承整体减振与传统刚性支撑两种安装方式下船体的振动响应,并识别出对应的优势模态,然后利用间接识别法计算螺旋桨的纵向力谱,并以此作为输入评估系统的减振性能,最后对推力轴承整体减振系统的激励响应特性进行实验研究。
      结果   结果表明,与传统刚性支撑方案相比,推力轴承整体减振技术对于螺旋桨横向激励衰减效果不明显,但对于螺旋桨纵向激励具有10 dB以上减振效果。
      结论   应用整体减振技术可使船用推力轴承纵向振动具有良好的衰减效果,所得结论可为船用推力轴承减振装置设计提供一种新的思路。

     

    Abstract:
      Objectives   The Integrated Vibration Isolation System (IVIS) for marine thrust bearings can be used to change the longitudinal vibration transmission path of the propulsion shafting system and attenuate the vibration energy transmitted from the propeller to the hull, thereby achieving the purpose of noise reduction.
      Methods   In order to obtain the transmission rules of the propeller excitation in different directions, a numerical analysis model of the propeller-shaft-hull was established. Then, the vibration transmission characteristics of the IVIS under the propeller's unit excitation forces in the longitudinal and lateral directions were analyzed. Under these two installation methods of thrust bearings, i.e. by means of the IVIS and the traditional rigid support, the vibration responses of the hull were compared and the corresponding dominant modes were identified. In addition, the longitudinal force spectrum of the propeller was calculated by indirect identification method, and the vibration isolation performance of the IVIS was evaluated by using it as an input. Finally, the experimental study on the response characteristics resulting from the propeller excitation of the IVIS was carried out.
      Results   The results show that, compared with the traditional rigid support method, the IVIS has no obvious vibration isolation effect for the propeller's lateral excitation force, but has a vibration isolation effect of more than 10 dB for the longitudinal excitation.
      Conclusions   The application of the IVIS can generate satisfactory vibration isolation effect of the marine thrust bearings in longitudinal direction, and this result can provide a new method for the design of marine thrust bearing vibration isolation devices。

     

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