Identification of elastic properties of stiffened composite shell

Abstract

In the present study a numerical‐experimental method for the identification of the elastic properties of stiffened composite panel from experimental vibration analysis is carried out. The elastic properties of a panel are found by an identification procedure based on the method of experiment design, the response surface approach, and the finite element method. The results obtained were verified by comparing the experimentally measured eigenfrequencies with the numerical ones obtained by FEM at the point of optima.

Santrauka

Aprašomas skaitinis‐eksperimentinis briaunotos kompozitines paneles tamprumo savybiu nustatymo metodas. Šioms savybems nustatyti taikytas identifikavimo metodas, kuriame sujungti skaitinio eksperimento planavimas, skaičiavimas baigtiniu elementu metodu bei gautu duomenu aproksimavimas. Identifikavimo rezultatus patvirtina pačios paneles dažniu eksperimentiniu duomenu palyginimas su skaitiniais baigtiniu elementu metodu aptiktu tamprumo savybiu rezultatais.

Keywords:

• finite element model
• identification
• response surface
• vibration test
• POLYTEC

Reikšminiai žodžiai:

• baigtiniu elementu modelis
• identifikavimas
• valdomas paviršius
• vibracijos testas
• POLYTEC