Water Impact Test and Simulation

sunnygu

In March 2002, a 25-ft/s vertical drop test of a composite fuselage section was conducted onto water. The purpose of the test was to obtain experimental data characterizing the structural response of the fuselage section during water impact
for comparison with two previous drop tests that were performed onto a rigid surface and soft soil. For the drop test, the fuselage section was configured with ten 100-lb. lead masses, five per side, that were attached to seat rails mounted to the floor. The fuselage section was raised to a height of 10-ft. and dropped vertically into a 15-ft. diameter pool filled to a depth f 3.5-ft. with water. Approximately 70 cha nels of data were collected during the drop test at a 10-kHz sampling rate. The est data were used to validate crash simulations of the water impact that were developed using the nonlinear, explicit ransient dynamic codes, MSC Dytran and LS-DYNA. The fuselage structure was modeled using shell and solid elements ith a Lagrangian mesh, and the water was modeled with both Eulerian and Lagrangian techniques. The fluid-structure
interactions were executed using the “fast” general coupling in MSC.Dytran and the Arbitrary Lagrange-Euler (ALE)
coupling in LS-DYNA. Additionally, the smooth particle hydrodynamics (SPH) meshless Lagrangian technique was used in
LS-DYNA to represent the fluid. The simulation results were correlated with the test data to validate the modeling approach.
Additional simulation studies were performed to determine how changes in mesh density, mesh uniformity, fluid viscosity,and failure strain influence the test-analysis correlation

yfs_000

这个是水上飞行器一类的试验测试，我看过。但用的是复合材料。

qinchao820210

呵呵
有点惧怕英文