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In this first paper of a three-paper sequence, we developed a standard work using the Lagrangian approach in LS-DYNA. The results were compared against experimental results. First, a simple one-dimensional beam centered impact problem was solved analytically to validate the results produced by LS-DYNA. For this case, the results were within 2.5% error when compared with the analytical solution. Bird-strike events were divided into three separate problems: frontal impact on rigid flat plate, 0 and 30 deg impact on deformable tapered plate. The bird model was modeled as a cylindrical fluid. The peak pressures and forces were compared to those results available in the literature. The case for 0 deg tapered plate impact shows little bird-plate interaction because the bird is sliced in two parts and the results were within 10% difference from the test data available in the literature. The developed Lagrangian approach is suitable for bird-strike events within 10% error.