Uncertainty analysis of structural systems by perturbation techniques

• Type: Article in International Scientific Journal
• Date: 2008

Authors

Henriques, AA (Author) FEUP; Veiga, JMC (Author) Other; Matos, JAC (Author) Other; Delgado, JM (Author) Other

Journal

Title: Structural and Multidisciplinary Optimization

Vol. 35 No. 3

Pages: 201-212

ISSN: 1615-147X

Publisher: Springer Nature

Indexing

ISI Web of Knowledge - 6 Citations

ISI Web of Science

Scopus - 11 Citations

COMPENDEX

Scientific classification

FOS: Engineering and technology > Other engineering and technologies

CORDIS: Technological sciences > Engineering

Other information

Authenticus ID: P-004-1DJ

DOI: 10.1007/s00158-007-0218-z

Abstract (EN): The formulation of an efficient method to evaluate the uncertainty of the structural response by applying perturbation techniques is described. Structural random variables are defined by their mean values, standard deviations and correlations. The uncertainty of structural behaviour is evaluated by the covariance matrix of response according to the developed perturbation methodology. It is also presented the procedure used to implement this method in a structural finite element framework. The implemented computational program allows, in only one structural analysis, to evaluate the mean value and the standard deviation of the structural response, defined in terms of displacements or forces. The proposed method is exact for problems with linear design functions and normal-distributed random variables. Results remain accurate for non-linear design functions if they can be approximated by a linear combination of the basic random variables.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 12