Study On Comprehensive Vibration And Noise Reduction Control Technology And Engineering Implementation Quality For Public Area In Large Passenger Ship

In recent years,with the increasing international exchanges,large passenger ships,which are important means of transportation at sea,have gradually come into the public’s view.Large passenger ships are represented by ocean-going cruise ships,whose production and construction process requirements are more stringent than those of other ships,and the vibration and noise reduction control in their public areas is particularly important compared to other ships,and is also one of the difficult points of vibration and noise control.The public area of a large passenger ship is equivalent to a mobile city complex,so it is necessary to carry out vibration and noise reduction treatment for the public area at the design stage to reduce the impact on other cabins or itself.This thesis focuses on the research of the cabin in the public area of a large passenger ship,using numerical simulation technology to simulate,calculate,and analyze the vibration of the target ship cabin,and reasonably control the areas with large vibration to achieve the purpose of reducing vibration;The key technology of noise reduction for the target ship has been tested and studied to provide reference for engineering applications;Compile relevant quality control documents for the implementation of vibration and noise reduction projects for large passenger ships to provide reference for possible problems in the implementation of vibration and noise reduction projects for other types of ships.The main study contents are as follows.(1)This article introduced the vibration analysis methods and noise reduction process experiment method.At the same time,combined with the quality control cases of other ship vibration and noise reduction projects and the standard documents of the target ship,it established a quality control system for the implementation of large passenger ship vibration and noise reduction projects.(2)A finite element model was established for the shop cabin and the market restaurant cabin in the common area of the target ship.Through modal analysis and harmonic response analysis,the frequency displacement response curves of the two cabin deck response evaluation points were obtained,and the positions in the cabin where the vibration was more obvious were found and vibration control schemes were proposed.(3)The finite element models of the shop and market restaurant cabins were rebuilt according to the vibration control schemes,and the results of the modal analysis and the harmonic response analysis of the same response evaluation points were compared with the original finite element model to verify the rationality of the vibration control schemes of the cabins.(4)This thesis conducted noise control for the main galley cabin in the public area of the target ship,conducted experimental research on its key noise reduction processes,verified the impact of coating material thickness and adhesive type on the sound absorption and insulation effect of the marine kitchen waste system pipes,and solved the difficulties in the noise reduction process.(5)Based on the actual engineering problems of the target ship,corresponding vibration and noise reduction control measures were proposed to ensure the consistency between the implementation of vibration and noise reduction and the design.