Robust bird-strike modeling using LS-DYNA.

摘要

Throughout this work, bird-strike events are studied using three approaches in LS-DYNA: Lagrangian, Arbitrary Lagrange Eulerian (ALE), and Smooth Particle Hydrodynamics (SPH). A simple one-dimensional beam centered impact problem was solved analytically to validate the results produced by LS-DYNA using the three mentioned methods. All three approaches in LS-DYNA produced results within 7% error when compared with the analytical solution. Bird-strike events, soft-body impact problems, are divided into three separate problems: frontal impact on rigid flat plate, 0 degree impact on deformable tapered plate, and 30 degree impact on deformable tapered plate. The bird model is modeled as a cylinder. Throughout the study, the most influencing parameters have been identified and peak pressures and forces are compared to those results available in the literature. The case for 0 degrees tapered plate impact shows little bird-plate interaction because the bird is sliced in two parts and the results from all three methods employed are within 10% difference from the test data available in the literature. For the frontal impact on rigid plate, all three methods are validated with the test data within 10% error. Overall, Lagrangian, ALE and SPH methods can be used for the analysis of bird-strike events.