For the U.S. Navy, the use of computational simulations is prevalent for structural finite-element analysis (FEA) but not for shop floor fabrication. However, prevention and mitigation of welding-induced deformation creates a significant manufacturing challenge during fabrication of major ship assemblies, especially for thin-plate steel construction. The objective of this project was to improve weld sequence planning (WSP) capabilities for major ship assemblies through the development of a quick and user friendly WSP software tool. Physical testing of tank-like structures validated the computational tool, which established high correlation between measured and predicted distortion results. An approximately 5x reduction in analysis time (from model set-up through solve time) was realized through process automation, development of a weld joint database, and weld sequence optimization algorithms. The end goal is improved confidence in, and use of, computational weld mechanics (CWM) techniques to more cost-effectively serve the U.S. Navy enterprise.
Computational Tool Development for Weld Sequence Planning in Major Assemblies
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Denault, Lori L., Finley, Jonathan T., Fisher, Charles R., Gooroochurn, Yogendra, and Shawn Rhodes. "Computational Tool Development for Weld Sequence Planning in Major Assemblies." Paper presented at the SNAME Maritime Convention, Houston, Texas, October 2017.
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