| The single and double cylindrical shell is the major structure of the underwatervehicles. It has very important theoretic value and practicality to research the vibration andsound radiation and the active control of sound radiation from a cylindrical shell. Thispaper studies the vibration and sound radiationfrom the single and double cylindrical shellin the air and wateron the full-band base on the analytic method and numerical method,and discusses the impact what a change of structure parameters posed on the vibrationand sound radiation from the single and double cylindrical shell in the air and water.Firstly, this paper has made a software named Cylinders which can calculate thevibration and sound radiation on the full-band baseon the analytic method.This softwarenot only can calculate the vibration and sound radiation from the single and doublecylindrical shell in the air and water on the full-band, but also has some post-processingfunctions such as describing response curve, generating modal cloud and so on. And, Thispaper compares the result from the software with the result from numerical method andthe experimental data, and has proved the correctness of this software.Then, use VAOne to build a numerical method which can calculate the the vibrationand sound radiation from the single and double cylindrical shell in the air andwater.,Analyse the property of vibration and sound radiation from the single and doublecylindrical shell in the air and water on the full-band according to the results.Compare theresult from VAOne with the result from Cylinders which has been proved correct in theabove paragraphs, and have indicated the correctness.Last,use VAOne to calculate the result after changing the structure parameters,anddiscusses the impact what a change of structure parameters posed on the vibration andsound radiation from the single and double cylindrical shell in the air and water,andprovide some data support for the structure design of submarines. |
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