Fluid-Soil-Structure Interaction Analysis of Tank for ...

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SC SOLUTIONS, Inc. © 2014, CONFIDENTIAL SC SOLUTIONS, Inc. © 2017 DOE NPH Meeting Fluid-Soil-Structure Interaction Analysis of Tank for Seismic Evaluation of Nozzle Subjected to Differential Movement October 23, 2018 LA-UR-18-29880
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Transcript of Fluid-Soil-Structure Interaction Analysis of Tank for ...

PowerPoint PresentationDOE NPH Meeting
October 23, 2018
Problem Statement
• Nonlinear anchor response
SC SOLUTIONS, Inc. © 2014, CONFIDENTIAL SC SOLUTIONS, Inc. © 2017
Problem Statement
Previous Analysis
Δdemand = Δrocking + εallow·lbolt induced on tank end of system
1% strain
Project Scope
Assess functionality (pressure retention) of tank and draw-off piping connection during and after DBE
Phase 1: Determine if detailed analysis can address concern
Phase 2: Perform final analysis and documentation to full code and QA requirements for support of safety basis
SC SOLUTIONS, Inc. © 2014, CONFIDENTIAL SC SOLUTIONS, Inc. © 2017
Acceptance Criteria
– API 650 moment capacity
– ASME B31E
– SQUG GIP 3A
– Elongation limit ~1%
Global System Model
Global System Model
Soil Model
Soil Verification
Fluid-Structure Model
• Fluid continuum elements
• Lagrangian fluid model
Nonlinear Anchor Model
Nonlinear Anchor Response
Model Verification
• Nonlinear anchor behavior
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Response at Maximum Nozzle Stress
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Response at Maximum Nozzle Stress
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System Response
Tank Dynamic Response
Tank Dynamic Response
Tank Dynamic Response
Tank Dynamic Response
Tank Dynamic Response
Fo rc
Nozzle demand
Axial response
Uplift response
Tank Dynamic Response
anticipated
3. Overall maximum stress due to combined behavior
SC SOLUTIONS, Inc. © 2014, CONFIDENTIAL SC SOLUTIONS, Inc. © 2017
Sensitivity Studies
Varied Parameters:
• Stiff anchors
Benefits of Detailed Analysis
• Nozzle moments roughly 1/3
• Combined FSI-SSI-nonlinear anchor response explicitly captured
• Local tank deformation a result of combined system response vs. imposed boundary conditions
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Project Conclusion
• Tank experienced minor overstress
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Detailed analysis likely to address concern given acceptability of minor overstress
SC SOLUTIONS, Inc. © 2014, CONFIDENTIAL SC SOLUTIONS, Inc. © 2017
Questions?
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