Liu, Pei-LingPei-LingLiuChen, Cheng-ChiehCheng-ChiehChen2009-02-042018-06-292009-02-042018-06-2919960022460Xhttp://ntur.lib.ntu.edu.tw//handle/246246/119693https://www.scopus.com/inward/record.uri?eid=2-s2.0-0030104360&doi=10.1006%2fjsvi.1996.0121&partnerID=40&md5=2934a3492bd944581bd530da04106339A method for identifying the element rigidities of a truss is developed. The transient response of the truss is transformed into the frequency domain for use in the identification process. The spectral finite element method is employed to formulate the equilibrium equation of the truss in the frequency domain. The identification problem is then formulated as an optimization program in which the error norm of the equilibrium equation is minimized. The issue of identifiability is addressed. A numerical example is presented to illustrate the proposed method. It is shown the element properties can be obtained successfully. The influence of noise is investigated through an example. © 1996 Academic Press Limited.application/pdf521042 bytesapplication/pdfen-USAcoustic noise; Finite element method; Frequency domain analysis; Optimization; Parameter estimation; Structural analysis; Equilibrium equation; Transient response; Trussesjournal article10.1006/jsvi.1996.01212-s2.0-0030104360WOS:A1996UB60400007http://ntur.lib.ntu.edu.tw/bitstream/246246/119693/1/03.pdf