Applications of Impedance Method on Syntheses of Structural Vibration Responses

• Main Authors: Wen-nan Chen, 程文男
• Other Authors: Chin-Chun Cheng
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/13302496558714700171

碩士 === 國立中正大學 === 機械工程所 === 94 === This thesis focuses on determining the vibration characteristics of a structure based on impedance coupling technique after this structure is modified. There are two kinds of structure modifications discussed in this thesis. The first is to remove parts of the structure and the sec-ond is to dent parts of the structure. In the first kind of structure modi-fication, effects of the location, amounts, and geometric sizes of re-moved parts on the natural frequencies of the original structure are discussed. As for the second kind of structure modification, the struc-ture is dented periodically. The structure is divided into segments and each segment includes a curved beam and a straight beam. The vibra-tion characteristics of the dented structure are determined by assem-bling the impedance of each structure segment. The application of im-pedance coupling technique is further extended to determining the dent size and location in order to obtain pre-designated natural fre-quencies.