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Simulation and experimental investigations on water-lubricated squeeze film damping stern bearing

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Abstract

In order to solve the contradiction between high load-carrying capacity and low natural frequency in designing ship water-lubricated stern bearing, an idea of independent design of load carrying and vibration reduction functions was proposed, and the squeeze film damper technology was innovatively introduced into a conventional water-lubricated stern bearing (CWSB) to form a water-lubricated damping stern bearing (WDSB). Harmonic responses of two bearings were calculated, and a dynamic characteristic experiment was carried out. The results show that the maximum displacement response (MDR) decreases with the increase in oil film clearance. With the increase in inner flange height, MDR increases first and then decreases. MDR decreases first and then increases with the increase in distribution angle. As rotation rate speeds, the difference between two bearings’ Root Mean Square (RMS) vibration amplitude remains unchanged. As load increases, relative reductions of two bearings’ maximum amplitude and RMS decrease. Amid a load of 0.2 MPa and a rotational speed of 200r/min, compared with CWSB, the maximum amplitude of WDSB in the vertical direction is reduced by about 71.8%, and the relative reduction in RMS is about 47.8%, which verifies the damping effect of WDSB is remarkable.

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Acknowledgments

This paper is supported by the National Defense Pre-Research Foundation of China (No. 61402100402).

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Authors and Affiliations

  1. School of Energy and Power Engineering, Wuhan University of Technology, Wuhan, 430063, China

    Wu Ouyang, Qilong Yan, Junxin Kuang & Yong Jin

  2. Reliability Engineering Institute, National Engineering Research Center for Water Transport Safety, Wuhan, 430063, China

    Wu Ouyang

  3. Key Laboratory of Marine Power Engineering and Technology, Ministry of Transport, Wuhan, 430063, China

    Wu Ouyang & Yong Jin

  4. National Key Laboratory on Ship Vibration & Noise, China Ship Development and Design Center, Wuhan, 430064, China

    Weicai Peng

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  1. Wu Ouyang
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  2. Qilong Yan
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  3. Junxin Kuang
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  4. Yong Jin
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  5. Weicai Peng
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Correspondence to Wu Ouyang.

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Technical Editor: Thiago Ritto.

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Appendix

Appendix

Acronyms

Full name

CWSB

Conventional water-lubricated stern bearing

WDSB

Water-lubricated damping stern bearing

MDR

Maximum displacement response

RMS

Root mean square

WSB

Water-lubricated stern bearing

SFDs

Squeeze film dampers

ISFD

Integral squeeze film damper

EDM

Electrical discharge machining

FSI

Fluid–structure interaction

NBR

Nitrile rubber

FMDR

Frequency at the maximum displacement response

FMSR

Frequency at the maximum stress response

MSR

Maximum stress response

FEM

Finite element method

MAX

Maximum value

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Ouyang, W., Yan, Q., Kuang, J. et al. Simulation and experimental investigations on water-lubricated squeeze film damping stern bearing. J Braz. Soc. Mech. Sci. Eng. 43, 54 (2021). https://doi.org/10.1007/s40430-020-02785-6

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  • DOI: https://doi.org/10.1007/s40430-020-02785-6

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