Modal Parameter Identification Through Simulated Evolution

• Main Authors: Wong, Sze-Chung, 黃思聰
• Other Authors: Chiang Dar-Yun
• Format: Others
• Language: zh-TW
• Published: 1996
• Online Access: http://ndltd.ncl.edu.tw/handle/73178867749938107646

碩士 === 國立成功大學 === 航空太空工程學系 === 84 === In this thesis, modal parameter identification of linear vibrating structure based on optimization approach is studied. A global optimization search algorithm based on the Darwinian Evolutionary Theory is implemented for identification of modal parameters of a linear vibrating structure. The capability of the evolutionary method in locating the global minimum among numerous local minima will be demonstrated. Moreover, different kinds of convergence criteria for the simulated evolution and their effects on the identification results will be studied. The reliability of the searching technique in modal parameter identification under different measurement noise levels will also be examined. Results show that the technique is effective and reliable in identifying dominant modes under moderate noisy conditions.