I am tasked with simulating a drop test for a sheet metal structural frame in ansys and want to know what the best approach will be to simulating this in ansys mechanical. The engineers before me performed a static structural analysis of the frame, with the frame supported at the base where casters would make contact with the ground, the force of gravity applied to the entire frame, and an acceleration of 15g's applied to the frame in the vertical direction. An acceleration of 15g was determined using drop test onto dense foam that resulted in accelerometer data that peaked at about 15g's. To be conservative they used 15g's as the acceleration in the ansys simulation when simulating the drop test.
Is this a viable way to simulate stresses on the frame from impact? I'm concerned that this method isn't capturing what's really happening, because in this simulation, the rapid acceleration of the frame at impact will occur on the entire frame, whereas in reality, I think only the bottom of the frame making contact with the ground would experience the impact force and this force would get transmitted through the rest of the frame.
When I've looked online for how to do this, everyone is using explicit dynamics or nonlinear simulations, and we don't want the simulation to be that complex. I'm looking for the simplest way to get accurate results, even if they are conservative, using a linear solution.