Robust reliability-based optimization with a moment method for hydraulic pump sealing design

Robust reliability-based optimization with a moment method for hydraulic pump sealing design Reliability-based design (RBD) is widely applied to meet the reliability requirement at a reduced cost. Current RBD methods require complete distributions of basic random variables, but in real applications, such as the sealing design for hydraulic piston pumps, only statistical moments may be available. The reliability obtained from the RBD may also be sensitive to possible variations in distribution parameters or moments of basic random variables. To deal with these two challenges in the sealing design for hydraulic piston pumps, this study employs a robust reliability-based design methodology based on statistical mo- ments. The optimization not only minimizes the sealing area of friction pairs, but also the sensitivity of the reliability. As a result, the reliability requirement is maintained with the increased robustness of the reliability. An improved higher moment (up to the forth moment) is also employed for higher accuracy with the associated analytical sensitivity indexes. The robust RBD meth- odology is successfully applied to the design of the seal of the slipper-swash plate friction pairs for a hydraulic piston pump. The application includes the reliability analysis, reliability sensitivity analysis, and robust RBD. The results demonstrate that robust RBD can produce more robust reliability than a traditional RBD http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Structural and Multidisciplinary Optimization Springer Journals

Robust reliability-based optimization with a moment method for hydraulic pump sealing design

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Publisher
Springer Berlin Heidelberg
Copyright
Copyright © 2018 by Springer-Verlag GmbH Germany, part of Springer Nature
Subject
Engineering; Theoretical and Applied Mechanics; Computational Mathematics and Numerical Analysis; Engineering Design
ISSN
1615-147X
eISSN
1615-1488
D.O.I.
10.1007/s00158-018-1996-1
Publisher site
See Article on Publisher Site

Abstract

Reliability-based design (RBD) is widely applied to meet the reliability requirement at a reduced cost. Current RBD methods require complete distributions of basic random variables, but in real applications, such as the sealing design for hydraulic piston pumps, only statistical moments may be available. The reliability obtained from the RBD may also be sensitive to possible variations in distribution parameters or moments of basic random variables. To deal with these two challenges in the sealing design for hydraulic piston pumps, this study employs a robust reliability-based design methodology based on statistical mo- ments. The optimization not only minimizes the sealing area of friction pairs, but also the sensitivity of the reliability. As a result, the reliability requirement is maintained with the increased robustness of the reliability. An improved higher moment (up to the forth moment) is also employed for higher accuracy with the associated analytical sensitivity indexes. The robust RBD meth- odology is successfully applied to the design of the seal of the slipper-swash plate friction pairs for a hydraulic piston pump. The application includes the reliability analysis, reliability sensitivity analysis, and robust RBD. The results demonstrate that robust RBD can produce more robust reliability than a traditional RBD

Journal

Structural and Multidisciplinary OptimizationSpringer Journals

Published: May 31, 2018

References

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