Watercraft impacting on Water
Watercraft impacting on Water
(OP)
Has anybody done analysis on watercraft impacting on water? Assuming a 30 foot boat dropped on water from a height of 15 feet. I don't know where to start - LSDYNA? ABAQUS-EXPLICIT? something else? Advise.
SH
SH





RE: Watercraft impacting on Water
Find something that will model the water, but not necessarily calculate its stress. I know Algor has "kinematic elements" as well as, I think, "hydrodynamic elements". The kinematic elements aren't included in the stress calculation (speeds up the analysis).
Total cost of the AMPS package even with the explicit solver is amazingly reasonable for the power. Pre-processing a boat hull may be a little difficult, but I'm not a super-user...still learning.
There are several hydrodynamic codes out there, but I'm not sure any of them would handle this. They are usually designed for planing craft "cutting through" waves...
RE: Watercraft impacting on Water
I couldnt understand why did you suggest Algor and NEiNastran (implicit analysis) for this time dependent crash?
RE: Watercraft impacting on Water
As for the water, you could model it as a semi-rigid barrier, or series of semi-rigid barriers, on springs, so that when the boat hits them, the springs dampen the impact. Model these barriers with a relatively small width so that the boat keel would impact the middle barrier which would begin to deflect before the boat impacts the two adjacent barriers and so on...
RE: Watercraft impacting on Water
See thread404-96282
RE: Watercraft impacting on Water
See also thread2-70271