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Variance-Based Sensitivity Analysis to Support Simulation-Based Design Under Uncertainty

Journal Article · · Journal of Mechanical Design
DOI:https://doi.org/10.1115/1.4034224· OSTI ID:1423944
 [1];  [2];  [3]
  1. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Dept. of Aeronautics and Astronautics; Massachusetts Institute of Technology
  2. Texas A & M Univ., College Station, TX (United States). Dept. of Mechanical Engineering
  3. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Dept. of Aeronautics and Astronautics
Sensitivity analysis plays a critical role in quantifying uncertainty in the design of engineering systems. A variance-based global sensitivity analysis is often used to rank the importance of input factors, based on their contribution to the variance of the output quantity of interest. However, this analysis assumes that all input variability can be reduced to zero, which is typically not the case in a design setting. Distributional sensitivity analysis (DSA) instead treats the uncertainty reduction in the inputs as a random variable, and defines a variance-based sensitivity index function that characterizes the relative contribution to the output variance as a function of the amount of uncertainty reduction. This paper develops a computationally efficient implementation for the DSA formulation and extends it to include distributions commonly used in engineering design under uncertainty. Application of the DSA method to the conceptual design of a commercial jetliner demonstrates how the sensitivity analysis provides valuable information to designers and decision-makers on where and how to target uncertainty reduction efforts.
Research Organization:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR) (SC-21)
Grant/Contract Number:
SC0009297; SC0009637
OSTI ID:
1423944
Journal Information:
Journal of Mechanical Design, Journal Name: Journal of Mechanical Design Journal Issue: 11 Vol. 138; ISSN 1050-0472
Publisher:
ASMECopyright Statement
Country of Publication:
United States
Language:
English

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