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On the solution of first-excursion failure problem for linear systems by efficient simulation

Au, Siu-Kui and Beck, James L. (2000) On the solution of first-excursion failure problem for linear systems by efficient simulation. California Institute of Technology . (Unpublished) http://resolver.caltech.edu/CaltechEERL:2000.EERL-2000-01

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Abstract

An analytical study of the failure region of the first-excursion reliability problem for linear dynamical systems subjected to Gaussian white noise excitation is carried out with a view to constructing a suitable importance sampling density for computing the first-excursion failure probability. Central to the study are 'elementary failure regions', which are defined as the failure region in the load space corresponding to the failure of a particular output response at a particular instant. Each elementary failure region is completely characterized by its design point, which can be computed readily using impulse response functions of the system. It is noted that the complexity of the first-excursion problem stems from the structure of the union of the elementary failure regions. One important consequence of this union structure is that, in addition to the global design point, a large number of neighboring design points are important in accounting for the failure probability. Using information from the analytical study, an importance sampling density is proposed. Numerical examples are presented, which demonstrate that the efficiency of using the proposed importance sampling density to calculate system reliability is remarkable.


Item Type:Report or Paper (Technical Report)
Group:Earthquake Engineering Research Laboratory
Record Number:CaltechEERL:2000.EERL-2000-01
Persistent URL:http://resolver.caltech.edu/CaltechEERL:2000.EERL-2000-01
Usage Policy:You are granted permission for individual, educational, research and non-commercial reproduction, distribution, display and performance of this work in any format.
ID Code:26260
Collection:CaltechEERL
Deposited By: Imported from CaltechEERL
Deposited On:09 Aug 2001
Last Modified:26 Dec 2012 13:55

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