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Research on the Full-spectrum Noise Prediction and Control Method for High-speed Ship

Author: QiuBin
Tutor: WuWeiGuo
School: Wuhan University of Technology
Course: Underwater Acoustics
Keywords: FE - SEA hybrid method VA One High Speed ??Craft Noise prediction Noise control
CLC: TB535
Type: Master's thesis
Year: 2010
Downloads: 233
Quote: 7
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Abstract


In recent years, the ship cabin noise problems increasingly attentions cabin noise will not only affect the normal working of the cabin a variety of instruments , equipment , will also affect the comfort of the passengers and crew , and its health hazards . After the end of the overall design of the ship to take a variety of noise reduction measures can only partially solve the problem , in most cases , but also directly increase the cost of shipbuilding . If the ship cabin noise early in the design stage to predict the proposed measures to improve the acoustic design will shorten the shipbuilding cycle , reduce shipbuilding costs plays an important role . Therefore, noise and vibration analysis of the structure of the ship in the ship design stage is very meaningful . VA One is the finite element analysis , boundary element analysis , statistical energy analysis , FE - SEA hybrid analysis of the full-band noise and vibration analysis software integrated in a simulated environment . This article describes the finite element method ( FEM ) , the Statistical Energy Analysis ( SEA ) and FE - SEA mixing of the basic principles and scope of application , and the application of VA One software for solving the low, mid , and high-frequency high-speed cabin room noise , high-speed the cabin room full-band noise problems forecast analysis and compared with the measured values ??of the same ship , indicating that the simulation is reasonably practicable . Obtained through simulation forecasts of the various compartments of the noise level, the distribution of the frequency characteristic and the noise spectrum of the main component . OVERVIEW ship noise control problems , VA One software on different layers by the different thickness and density of the sound absorbing material , sound-absorbing material composite optimization studies, and obtained three relatively lighter weight , better sound absorption properties of the composite sound-absorbing material . According to the different the subsystem energy contribution compartment tune the size of , hybrid applications of the three composite sound-absorbing material on the high-speed craft require a higher level of noise in the cabin noise control treatment achieved good sound absorption effect . The study on how to apply the FE - SEA hybrid method and VA One software for noise and vibration research , how to create a simulation analysis model of the ship's structure , how to effectively reducing vibration and noise in the high - speed ship design stage room of the ship some guidance significance and reference value.

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CLC: > Industrial Technology > General industrial technology > Acoustic engineering > Vibration, noise and its control > Vibration and noise control and its use
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