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Journal Articles

Confidence-Based Design Optimization for a More Conservative Optimum Under Surrogate Model Uncertainty Caused by Gaussian Process

Yongsu Jung, Kyeonghwan Kang, Hyunkyoo Cho, Ikjin Lee
Journal: Journal of Mechanical Design
Article Type: Research Papers
J. Mech. Des. September 2021, 143(9): 091701.
Paper No: MD-20-1678
DOI: https://doi.org/10.1115/1.4049883
Published Online: February 11, 2021
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Topics: Design, Optimization, Reliability, Uncertainty, Modeling
Journal Articles

Iterative Most Probable Point Search Method for Problems With a Mixture of Random and Interval Variables

Hyunkyoo Cho, Kyung K. Choi, Jaekwan Shin
Journal: Journal of Mechanical Design
Article Type: Research Papers
J. Mech. Des. July 2020, 142(7): 071703.
Paper No: MD-19-1523
DOI: https://doi.org/10.1115/1.4045507
Published Online: December 12, 2019
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Topics: Design, Event history analysis, Optimization, Interpolation
Proceedings Papers

Confidence-Based Design Optimization Under Data Uncertainty Using Most Probable Point-Based Approach

Yongsu Jung, Hyunkyoo Cho, Ikjin Lee
Proc. ASME. IDETC-CIE2019, Volume 2B: 45th Design Automation Conference, V02BT03A042, August 18–21, 2019
Paper No: DETC2019-97718
DOI: https://doi.org/10.1115/DETC2019-97718
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Topics: Design, Optimization, Reliability-based optimization, Uncertainty
Proceedings Papers

Determination of the Number of Input Data Through Bi-Objective Confidence-Based Design Optimization

Yongsu Jung, Hyunkyoo Cho, Zunyi Duan, Ikjin Lee
Proc. ASME. IDETC-CIE2019, Volume 2B: 45th Design Automation Conference, V02BT03A043, August 18–21, 2019
Paper No: DETC2019-97721
DOI: https://doi.org/10.1115/DETC2019-97721
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Topics: Design, Optimization, Reliability-based optimization, Uncertainty
Proceedings Papers

Global Sensitivity Analysis for Stay Vane and Casing Design of Reaction Hydraulic Turbine

Hyunkyoo Cho, Ujjwal Shrestha, Young-Do Choi, Jungwan Park
Proc. ASME. AJKFluids2019, Volume 3A: Fluid Applications and Systems, V03AT03A016, July 28–August 1, 2019
Paper No: AJKFluids2019-4684
DOI: https://doi.org/10.1115/AJKFluids2019-4684
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Topics: Design, Hydraulic turbines, Sensitivity analysis
Proceedings Papers

Most Probable Point-Based Approximated Dimension Reduction Method in Reliability-Based Design Optimization

Yongsu Jung, Hyunkyoo Cho, Ikjin Lee
Proc. ASME. IDETC-CIE2018, Volume 2B: 44th Design Automation Conference, V02BT03A062, August 26–29, 2018
Paper No: DETC2018-86382
DOI: https://doi.org/10.1115/DETC2018-86382
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Topics: Dimensions, Reliability-based optimization, Approximation, Event history analysis, Finite element analysis, Reliability, Design, Failure, Probability
Proceedings Papers

Iterative Most Probable Point Search Method for Problems With Mixture of Random and Interval Variables

Hyunkyoo Cho, K. K. Choi
Proc. ASME. IDETC-CIE2017, Volume 2B: 43rd Design Automation Conference, V02BT03A054, August 6–9, 2017
Paper No: DETC2017-67909
DOI: https://doi.org/10.1115/DETC2017-67909
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Topics: Design, Engineering systems and industry applications, Engineers, Event history analysis, Interpolation, Optimization, Uncertainty
Journal Articles

Sensitivity Developments for RBDO With Dependent Input Variable and Varying Input Standard Deviation

Hyunkyoo Cho, K. K. Choi, David Lamb
Journal: Journal of Mechanical Design
Article Type: Research-Article
J. Mech. Des. July 2017, 139(7): 071402.
Paper No: MD-16-1522
DOI: https://doi.org/10.1115/1.4036568
Published Online: May 10, 2017
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Topics: Design
Journal Articles

Reliability-Based Design Optimization Using Confidence-Based Model Validation for Insufficient Experimental Data

Min-Yeong Moon, K. K. Choi, Hyunkyoo Cho, Nicholas Gaul, David Lamb, David Gorsich
Journal: Journal of Mechanical Design
Article Type: Research-Article
J. Mech. Des. March 2017, 139(3): 031404.
Paper No: MD-16-1560
DOI: https://doi.org/10.1115/1.4035679
Published Online: January 27, 2017
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Topics: Design, Model validation, Probability, Failure, Simulation models
Proceedings Papers

Sensitivity Developments for Sensitivity-Based RBDO With Correlated Input Variable and Varying Input Standard Deviation

Hyunkyoo Cho, K. K. Choi, David Lamb
Proc. ASME. IDETC-CIE2016, Volume 2B: 42nd Design Automation Conference, V02BT03A056, August 21–24, 2016
Paper No: DETC2016-60175
DOI: https://doi.org/10.1115/DETC2016-60175
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Topics: Design, Event history analysis, Failure, Optimization, Probability, Reliability, Reliability-based optimization
Proceedings Papers

Reliability-Based Design Optimization Using Confidence-Based Model Validation for Insufficient Experimental Data

Min-Yeong Moon, K. K. Choi, Hyunkyoo Cho, Nicholas Gaul, David Lamb, David Gorsich
Proc. ASME. IDETC-CIE2016, Volume 2B: 42nd Design Automation Conference, V02BT03A054, August 21–24, 2016
Paper No: DETC2016-60155
DOI: https://doi.org/10.1115/DETC2016-60155
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Topics: Model validation, Reliability-based optimization, Design, Simulation models, Uncertainty, Optimization, Physics, Product testing, Reliability
Proceedings Papers

Numerical Procedure for Design Optimization of Wind Turbine Drivetrain Using Multibody Gear Dynamics Simulation Considering Wind Load Uncertainty

Huaxia Li, Hiroyuki Sugiyama, Hyunkyoo Cho, K. K. Choi, Nicholas J. Gaul
Proc. ASME. IDETC-CIE2016, Volume 6: 12th International Conference on Multibody Systems, Nonlinear Dynamics, and Control, V006T09A054, August 21–24, 2016
Paper No: DETC2016-59654
DOI: https://doi.org/10.1115/DETC2016-59654
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Topics: Design, Dynamics (Mechanics), Gears, Optimization, Simulation, Stress, Uncertainty, Wind, Wind turbines, Gear teeth
Proceedings Papers

Development of a Conservative Model Validation Approach for Reliable Analysis

Min-Yeong Moon, K. K. Choi, Hyunkyoo Cho, Nicholas Gaul, David Lamb, David Gorsich
Proc. ASME. IDETC-CIE2015, Volume 2B: 41st Design Automation Conference, V02BT03A057, August 2–5, 2015
Paper No: DETC2015-46982
DOI: https://doi.org/10.1115/DETC2015-46982
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Topics: Model validation, Simulation models, Design, Failure, Probability, Simulation, Approximation, Calibration, Event history analysis, Optimization
Proceedings Papers

Design Sensitivity Method for Sampling-Based RBDO With Fixed COV

Hyunkyoo Cho, K. K. Choi, Ikjin Lee, David Lamb
Proc. ASME. IDETC-CIE2015, Volume 2B: 41st Design Automation Conference, V02BT03A059, August 2–5, 2015
Paper No: DETC2015-47359
DOI: https://doi.org/10.1115/DETC2015-47359
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Topics: Design, Failure, Probability, Event history analysis, Optimization, Reliability-based optimization, Simulation
Proceedings Papers

Modified Bayesian Kriging for Noisy Response Problems for Reliability Analysis

Nicholas J. Gaul, Mary Kathryn Cowles, Hyunkyoo Cho, K. K. Choi, David Lamb
Proc. ASME. IDETC-CIE2015, Volume 2B: 41st Design Automation Conference, V02BT03A060, August 2–5, 2015
Paper No: DETC2015-47370
DOI: https://doi.org/10.1115/DETC2015-47370
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Topics: Event history analysis, Failure, Probability, Experimental design, Sampling methods, Modeling, Algorithms, Chain, Design, Multibody dynamics
Journal Articles

Design Sensitivity Method for Sampling-Based RBDO With Varying Standard Deviation

Hyunkyoo Cho, K. K. Choi, Ikjin Lee, David Lamb
Journal: Journal of Mechanical Design
Article Type: Research-Article
J. Mech. Des. January 2016, 138(1): 011405.
Paper No: MD-15-1333
DOI: https://doi.org/10.1115/1.4031829
Published Online: November 16, 2015
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Topics: Design, Failure, Probability, Optimization
Proceedings Papers

Confidence-Based Method for Reliability-Based Design Optimization

Hyunkyoo Cho, K. K. Choi, David Lamb
Proc. ASME. IDETC-CIE2014, Volume 2B: 40th Design Automation Conference, V02BT03A051, August 17–20, 2014
Paper No: DETC2014-34644
DOI: https://doi.org/10.1115/DETC2014-34644
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Topics: Reliability-based optimization, Reliability, Probability, Uncertainty, Design, Event history analysis, Failure, Simulation, Statistical distributions
Proceedings Papers

Confidence Level Estimation and Design Sensitivity Analysis for Confidence-Based RBDO

Hyunkyoo Cho, K. K. Choi, Ikjin Lee, David Gorsich
Proc. ASME. IDETC-CIE2012, Volume 3: 38th Design Automation Conference, Parts A and B, 1227-1238, August 12–15, 2012
Paper No: DETC2012-70725
DOI: https://doi.org/10.1115/DETC2012-70725
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Topics: Design sensitivity analysis, Event history analysis, Uncertainty, Probability, Design, Failure, Optimization, Reliability, Reliability-based optimization, Sensitivity analysis
Proceedings Papers

Experimental Study on the Structural Behavior of Secondary Barrier of MARK-III LNG CCS

Sangmin Han, Chae Whan Rim, Hyunkyoo Cho, Yongsuk Suh, Jaewon Lee, Tak Kee Lee
Proc. ASME. OMAE2009, Volume 1: Offshore Technology, 101-107, May 31–June 5, 2009
Paper No: OMAE2009-79126
DOI: https://doi.org/10.1115/OMAE2009-79126
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Topics: Carbon capture and storage, Liquefied natural gas, Glues, Fiber Bragg gratings, Sensors, Strain gages, Adhesives, Epoxy adhesives, Structural analysis, Temperature