OPTIMAL DESIGN OF DYNAMIC ABSORBERS FOR REDUCTION OF THE VIBRATION AND THE INTERIOR NOISE OF A CYLINDRICAL SHELL

• Main Authors: CHEN, CHIN-CHENG, 陳俊成
• Other Authors: HUANG,YII-MEI
• Format: Others
• Language: zh-TW
• Published: 1996
• Online Access: http://ndltd.ncl.edu.tw/handle/01318186876537066265

碩士 === 國立中央大學 === 機械工程學系 === 84 === A closed cylindrical shell is used as a simple model of the fuselageof an aircraft. For reducing the vibration of the fuselage and the resultant sound pressure due to propellers, several dynamic absorbers are attached to the shell. In the report, the vibration and the interior sound field are devived analytically by using the technique of subsystem synthesis and model expansion, where the external distributed forces are chosen according to experimental data of a real aircraft. The optimal design of the absorbers for the above mentioned purpose is investigated. The absorbers after designed can greatly improve the performance.