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| Study on solving method in SEA for complicated coupled system |
| LEI Ye; SHENG Mei-ping |
| (College of Marine, Northwestern Polytechnical University, Xi’an 710072, China) |
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Abstract The aim of this thesis is how to solve the sound and vibration responses of complicated coupled system effectively by using SEA method. Firstly, based on the issue of testing the input power inaccurately, useful statistics energy balance equations were built. Afterwards, considering the statistics energy balance equations’ dimension of actual large-scale multiple structure is too big and errors must be existed in the experimental data, an effective method was studied. It used for avoiding the singularity matrix, which would be occurred in large probability. Additionally, an effective method used in how to utilize the rich experimental data and improve the prediction precision was investigated. Finally, noise and vibration forecast of a complicated coupled structure was carried out, and the result was compared with the experimental data. It is validated that the methods mentioned in this thesis are reliable and valuable.
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Received: 23 April 2009
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2010, Vol. 29 
