Efficient uncertainty propagation for high-fidelity simulations with large parameter spaces: Application to stiffened plate buckling

[+] Author and Article Information
Ken Nahshon

Naval Surface Warfare Center Carderock Division

Nicholas Reynolds

Naval Surface Warfare Center Carderock Division

Michael Shields

Dept. of Civil Engineering, Johns Hopkins University

1Corresponding author.

ASME doi:10.1115/1.4039836 History: Received October 10, 2017; Revised March 09, 2018


Uncertainty quantification and propagation are critical to the computational assessment of structural components and systems. In this work, we discuss the practical challenges of implementing uncertainty quantification for high-dimensional computational structural investigations; specifically identifying four major challenges: 1. Computational cost; 2. Integration of engineering expertise; 3. Quantification of epistemic and model-form uncertainties; and 4. Need for V&V, standards, and automation. To address these challenges, we propose an approach that is straightforward for analysts to implement, mathematically rigorous, exploits analysts' subject matter expertise, and is readily automated. The proposed approach utilizes the Latinized partially stratified sampling (LPSS) method to conduct small sample Monte Carlo simulations. A simplified model is employed and analyst expertise is leveraged to cheaply investigate the best LPSS design for the structural model. Convergence results from the simplified model are then used to design an efficient LPSS-based uncertainty study for the high-fidelity computational model investigation. The methodology is carried out to investigate the buckling strength of a typical marine stiffened plate structure with material variability and geometric imperfections.

Section 4: U.S. Gov Employees + Reg Authors
Your Session has timed out. Please sign back in to continue.






Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In