Optimization Design Of Vibration And Noise For Large Scale LNG Carrier

With the development of the times,the problem of ship vibration noise is generally known to the public,in general,the possibility of problems related to indoor instrument equipment has affected cabin vibration and noise,in addition,the crew comfort will be affected by the cabin vibration and noise.However,system of ship shows complicated and changeable,so the problem of noise the cabin is also very difficult to carry on the reasonable solution,because many essential factors are difficult to identify and measure,so the project,how to predict the problem of ship superstructure cabin noise has been plagued by engineers.In general,the vibration and noise reduction measures to reduce noise,the solution The effect is not ideal and not comprehensive,and the manufacturing cost is also very great.If at the beginning of the design of cabins of vibration and noise,puts forward the corresponding improvement measures,to improve the ship comfort,plays an important role in reducing the manufacturing cost.In this article,with 220 k LNG as the research target,low frequency using finite element method,high frequency using statistical energy method,intermediate frequency using a hybrid method for vibration noise analysis.In the article the basic principle and the applicable scope and so on all have specific instructions.Using VAONE software for noise prediction,has realized the full ship full frequency domain noise analysis,according to the forecast results anti-vibration noise reduction optimization measures are put forward.And the noise of shock after the noise reduction measures modeling and prediction,and measures before compare the forecast results,verify the effect of optimization measures,and provide different types of damping noise reduction method of the vibration noise guidelines and recommendations.The research work in this paper has a certain guiding significance and reference value for the acoustic simulation and prediction of the whole frequency domain,and how to effectively reduce vibration and noise of the ship cabin...