Structure optimization to enhance its natural frequencies based on measured frequency response functions

Cited 22 time in webofscience Cited 26 time in scopus
  • Hit : 303
  • Download : 0
A measured frequency response function (FRF) based structural modification method is presented to obtain optimal structural changes to enhance its natural frequencies. Structural dynamics modification (SDM) has been widely used for improvements of built-in structures. However, the optimum design obtained by SDM differs from the true optimal solution when large modal changes happen. In this paper, a substructure-coupling concept is used to get system equations in order to extend its use to large modal changes. FRF matrix of baseline structure and those of modification structures are coupled at the connection points under the condition of force equilibrium and geometric compatibility constraints. Thus, exact modified modal properties can be calculated even for the case of large modal changes. The optimal structural modification is calculated by combining eigenvalue sensitivities and eigenvalue reanalysis technique iteratively. Special attention is given to the case where baseline structure has some unidentified structural parameters to enlighten the advantage of this proposed method. An application to the case of beam stiffener optimization indicates that the proposed method can provide an accurate optimal structural change just based on measured FRFs without any kind of numerical models. (C) 2000 Academic Press.
Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
Issue Date
2000-02
Language
English
Article Type
Article
Keywords

SENSITIVITY

Citation

JOURNAL OF SOUND AND VIBRATION, v.229, no.5, pp.1235 - 1255

ISSN
0022-460X
DOI
10.1006/jsvi.1999.2591
URI
http://hdl.handle.net/10203/76131
Appears in Collection
ME-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 22 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0