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Journal Articles

Surrogate-Based Time-Dependent Reliability Analysis for a Digital Twin

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Weifei Hu, Jiquan Yan, Feng Zhao, Chen Jiang, Hongwei Liu, Hyunkyoo Cho, Ikjin Lee
Journal: Journal of Mechanical Design
Publisher: ASME
Article Type: Research Papers
J. Mech. Des. September 2023, 145(9): 091708.
Paper No: MD-23-1042
https://doi.org/10.1115/1.4062668
Published Online: July 18, 2023
View Articletitled, Surrogate-Based Time-Dependent Reliability Analysis for a Digital Twin
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Topics: Digital twin, Event history analysis, Failure, Probability, Stochastic processes, Errors, Reliability
Journal Articles

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

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Yongsu Jung, Kyeonghwan Kang, Hyunkyoo Cho, Ikjin Lee
Journal: Journal of Mechanical Design
Publisher: ASME
Article Type: Research Papers
J. Mech. Des. September 2021, 143(9): 091701.
Paper No: MD-20-1678
https://doi.org/10.1115/1.4049883
Published Online: February 11, 2021
View Articletitled, Confidence-Based Design Optimization for a More Conservative Optimum Under Surrogate Model Uncertainty Caused by Gaussian Process
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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

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Hyunkyoo Cho, Kyung K. Choi, Jaekwan Shin
Journal: Journal of Mechanical Design
Publisher: ASME
Article Type: Research Papers
J. Mech. Des. July 2020, 142(7): 071703.
Paper No: MD-19-1523
https://doi.org/10.1115/1.4045507
Published Online: December 12, 2019
View Articletitled, Iterative Most Probable Point Search Method for Problems With a Mixture of Random and Interval Variables
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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

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Yongsu Jung, Hyunkyoo Cho, Ikjin Lee
Proc. ASME. IDETC-CIE2019, Volume 2B: 45th Design Automation Conference, V02BT03A042, August 18–21, 2019
Publisher: American Society of Mechanical Engineers
Paper No: DETC2019-97718
https://doi.org/10.1115/DETC2019-97718
View Paper titled, Confidence-Based Design Optimization Under Data Uncertainty Using Most Probable Point-Based Approach
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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

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Yongsu Jung, Hyunkyoo Cho, Zunyi Duan, Ikjin Lee
Proc. ASME. IDETC-CIE2019, Volume 2B: 45th Design Automation Conference, V02BT03A043, August 18–21, 2019
Publisher: American Society of Mechanical Engineers
Paper No: DETC2019-97721
https://doi.org/10.1115/DETC2019-97721
View Paper titled, Determination of the Number of Input Data Through Bi-Objective Confidence-Based Design Optimization
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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

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Hyunkyoo Cho, Ujjwal Shrestha, Young-Do Choi, Jungwan Park
Proc. ASME. AJKFluids2019, Volume 3A: Fluid Applications and Systems, V03AT03A016, July 28–August 1, 2019
Publisher: American Society of Mechanical Engineers
Paper No: AJKFluids2019-4684
https://doi.org/10.1115/AJKFluids2019-4684
View Paper titled, Global Sensitivity Analysis for Stay Vane and Casing Design of Reaction Hydraulic Turbine
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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

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Yongsu Jung, Hyunkyoo Cho, Ikjin Lee
Proc. ASME. IDETC-CIE2018, Volume 2B: 44th Design Automation Conference, V02BT03A062, August 26–29, 2018
Publisher: American Society of Mechanical Engineers
Paper No: DETC2018-86382
https://doi.org/10.1115/DETC2018-86382
View Paper titled, Most Probable Point-Based Approximated Dimension Reduction Method in Reliability-Based Design Optimization
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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

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Hyunkyoo Cho, K. K. Choi
Proc. ASME. IDETC-CIE2017, Volume 2B: 43rd Design Automation Conference, V02BT03A054, August 6–9, 2017
Publisher: American Society of Mechanical Engineers
Paper No: DETC2017-67909
https://doi.org/10.1115/DETC2017-67909
View Paper titled, Iterative Most Probable Point Search Method for Problems With Mixture of Random and Interval Variables
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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

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Hyunkyoo Cho, K. K. Choi, David Lamb
Journal: Journal of Mechanical Design
Publisher: ASME
Article Type: Research-Article
J. Mech. Des. July 2017, 139(7): 071402.
Paper No: MD-16-1522
https://doi.org/10.1115/1.4036568
Published Online: May 10, 2017
View Articletitled, Sensitivity Developments for RBDO With Dependent Input Variable and Varying Input Standard Deviation
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Topics: Design
Journal Articles

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

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Min-Yeong Moon, K. K. Choi, Hyunkyoo Cho, Nicholas Gaul, David Lamb, David Gorsich
Journal: Journal of Mechanical Design
Publisher: ASME
Article Type: Research-Article
J. Mech. Des. March 2017, 139(3): 031404.
Paper No: MD-16-1560
https://doi.org/10.1115/1.4035679
Published Online: January 27, 2017
View Articletitled, Reliability-Based Design Optimization Using Confidence-Based Model Validation for Insufficient Experimental Data
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Topics: Design, Model validation, Probability, Failure, Simulation models
Proceedings Papers

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

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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
Publisher: American Society of Mechanical Engineers
Paper No: DETC2016-59654
https://doi.org/10.1115/DETC2016-59654
View Paper titled, Numerical Procedure for Design Optimization of Wind Turbine Drivetrain Using Multibody Gear Dynamics Simulation Considering Wind Load Uncertainty
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Topics: Design, Dynamics (Mechanics), Gears, Optimization, Simulation, Stress, Uncertainty, Wind, Wind turbines, Gear teeth
Proceedings Papers

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

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Hyunkyoo Cho, K. K. Choi, David Lamb
Proc. ASME. IDETC-CIE2016, Volume 2B: 42nd Design Automation Conference, V02BT03A056, August 21–24, 2016
Publisher: American Society of Mechanical Engineers
Paper No: DETC2016-60175
https://doi.org/10.1115/DETC2016-60175
View Paper titled, Sensitivity Developments for Sensitivity-Based RBDO With Correlated Input Variable and Varying Input Standard Deviation
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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

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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
Publisher: American Society of Mechanical Engineers
Paper No: DETC2016-60155
https://doi.org/10.1115/DETC2016-60155
View Paper titled, Reliability-Based Design Optimization Using Confidence-Based Model Validation for Insufficient Experimental Data
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Topics: Model validation, Reliability-based optimization, Design, Simulation models, Uncertainty, Optimization, Physics, Product testing, Reliability
Proceedings Papers

Development of a Conservative Model Validation Approach for Reliable Analysis

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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
Publisher: American Society of Mechanical Engineers
Paper No: DETC2015-46982
https://doi.org/10.1115/DETC2015-46982
View Paper titled, Development of a Conservative Model Validation Approach for Reliable Analysis
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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

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Hyunkyoo Cho, K. K. Choi, Ikjin Lee, David Lamb
Proc. ASME. IDETC-CIE2015, Volume 2B: 41st Design Automation Conference, V02BT03A059, August 2–5, 2015
Publisher: American Society of Mechanical Engineers
Paper No: DETC2015-47359
https://doi.org/10.1115/DETC2015-47359
View Paper titled, Design Sensitivity Method for Sampling-Based RBDO With Fixed COV
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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

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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
Publisher: American Society of Mechanical Engineers
Paper No: DETC2015-47370
https://doi.org/10.1115/DETC2015-47370
View Paper titled, Modified Bayesian Kriging for Noisy Response Problems for Reliability Analysis
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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

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Hyunkyoo Cho, K. K. Choi, Ikjin Lee, David Lamb
Journal: Journal of Mechanical Design
Publisher: ASME
Article Type: Research-Article
J. Mech. Des. January 2016, 138(1): 011405.
Paper No: MD-15-1333
https://doi.org/10.1115/1.4031829
Published Online: November 16, 2015
View Articletitled, Design Sensitivity Method for Sampling-Based RBDO With Varying Standard Deviation
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Topics: Design, Failure, Probability, Optimization
Proceedings Papers

Confidence-Based Method for Reliability-Based Design Optimization

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Hyunkyoo Cho, K. K. Choi, David Lamb
Proc. ASME. IDETC-CIE2014, Volume 2B: 40th Design Automation Conference, V02BT03A051, August 17–20, 2014
Publisher: American Society of Mechanical Engineers
Paper No: DETC2014-34644
https://doi.org/10.1115/DETC2014-34644
View Paper titled, Confidence-Based Method for Reliability-Based Design Optimization
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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

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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
Publisher: American Society of Mechanical Engineers
Paper No: DETC2012-70725
https://doi.org/10.1115/DETC2012-70725
View Paper titled, Confidence Level Estimation and Design Sensitivity Analysis for Confidence-Based RBDO
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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

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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
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2009-79126
https://doi.org/10.1115/OMAE2009-79126
View Paper titled, Experimental Study on the Structural Behavior of Secondary Barrier of MARK-III LNG CCS
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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