Applicability of different anti-shock analysis methods to water-lubricated bearings
[Objective]This study comprehensively investigates the applicability of different anti-shock ana-lysis methods to the water-lubricated bearing of a marine propulsion shaft system.[Methods]The dynamic design analysis method(DDAM),time domain analysis method based on BV043/85 standard,transient dy-namics method and experimental analysis method are respectively used to analyze the anti-shock properties of a water-lubricated stern bearing.The comparative analysis involves assessing the input shock spectrum and stress outcomes generated by each method,offering insights into the robustness of their respective shock envir-onments and suitability for water-lubricated bearings.[Results]After analyzing the stress results at the bear-ing flange and slab,the results show that the DDAM method has the largest result,followed by the time do-main analysis method,and the transient dynamics method has the smallest result.The water-lubricated bearing model has certain limitations in terms of large and concentrated shock inputs when analyzed by DDAM.The time domain analysis method and transient dynamics method are both real-time simulation methods in the time domain,and the former can be chosen in harsh environments,while the latter allows for the flexible design of the shock spectrum.The experimental analysis method is accurate and reliable,but the cost is too high.[Conclusion]The findings of this study offer valuable insights that can serve as references for the optimiza-tion of water-lubricated bearing structures.
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