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Record 44 of 1140
Computational methods for efficient structural reliability and reliability sensitivity analysis
Author and Affiliation:
Wu, Y.-T.(Southwest Research Inst., San Antonio, TX, United States)
Abstract: This paper presents recent developments in efficient structural reliability analysis methods. The paper proposes an efficient, adaptive importance sampling (AIS) method that can be used to compute reliability and reliability sensitivities. The AIS approach uses a sampling density that is proportional to the joint PDF of the random variables. Starting from an initial approximate failure domain, sampling proceeds adaptively and incrementally with the goal of reaching a sampling domain that is slightly greater than the failure domain to minimize over-sampling in the safe region. Several reliability sensitivity coefficients are proposed that can be computed directly and easily from the above AIS-based failure points. These probability sensitivities can be used for identifying key random variables and for adjusting design to achieve reliability-based objectives. The proposed AIS methodology is demonstrated using a turbine blade reliability analysis problem.
Publication Date: Jan 01, 1993
Document ID:
19930050158
(Acquired Dec 28, 1995)
Accession Number: 93A34155
Subject Category: STRUCTURAL MECHANICS
Report/Patent Number: AIAA PAPER 93-1626
Document Type: Conference Paper
Publication Information: SEE A93-33876; In: AIAA(ASME)ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, 34th and AIAA/ASME Adaptive Structures Forum, La Jolla, CA, Apr. 19-22, 1993, Technical Papers. Pt. 5 (A93-33876 1; p. p. 2817-2826.
Publisher Information: American Institute of Aeronautics and Astronautics, Washington, United States
Contract/Grant/Task Num: NAS3-24389
Financial Sponsor: NASA; United States
Organization Source: NASA Lewis Research Center; Cleveland, OH, United States
Description: 10p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: DIGITAL SIMULATION; FAILURE ANALYSIS; RELIABILITY ANALYSIS; SENSITIVITY; STRUCTURAL RELIABILITY; TURBINE BLADES; FAILURE MODES; FAULT TREES; MONTE CARLO METHOD
Imprint And Other Notes: In: AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, 34th and AIAA/ASME Adaptive Structures Forum, La Jolla, CA, Apr. 19-22, 1993, Technical Papers. Pt. 5 (A93-33876 13-39), p. 2817-2826.
Availability Source: Other Sources
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