slamming impact

[hasani]

i want to know about slamming impact on nonlinear motion of high speed vessel . but oll refrens explain about response on structure.

[Fanie]

Think of the impact as dropping the boat at that speed on a surface. At high speeds water becomes very hard and penetration does not happen hence the boat planes on top of it.

If you really want to know then jump out of a boat at high speed. It's like falling off the roof.

[hasani]

Originally Posted by Fanie

Think of the impact as dropping the boat at that speed on a surface. At high speeds water becomes very hard and penetration does not happen hence the boat planes on top of it.

If you really want to know then jump out of a boat at high speed. It's like falling off the roof.

it 's easy awnser i know when it happen an can determine it's force by different method but, not exist any explain about behaviar this event on ship motion(heave or pitch) . it's my problem thanks

[masalai]

hasani, at what speed and what conditions? - Hydros racing offshore (Dubai) is different to designing for high speed Atlantic crossing... (and both are beyond my capacity, and anyone who can answer will want to extract hefty fees for this specialist design service...)

[Guillermo]

Hi, hasani
Here you have something:
http://stinet.dtic.mil/cgi-bin/GetTR...c=GetTRDoc.pdf
http://cambridge.org/catalogue/catal...1845687&ss=toc

Google around for "seakeeping high speed vessels" and you'll find a lot of references.

Cheers.

[masalai]

Guillermo,
Many thanks - your knowledge and capacity to find information is nothing short of amazing. I had a read, and although the technical bits were glossed over by me, I learned a lot.... Thanks again...

Been also listening and enjoying the music/noise of Buddy Rich, Gene Kruper Carter Beauford, Charly Antolini, Duke Ellington, Sandy Nelson and the Shaddows... - nice when up loud and nothing outside could disturb me...

[safewalrus]

Trouble is with all that slamming it plays hell with the coffee! slops all over the place!