Report: DDG 51s heavily damaged by ‘bow slams’

[unhappycamper]

The destroyer Carney is among 13 Arleigh Burke-class ships that have been damaged in rough seas because designers didn’t account for the effect of “bow slams” on the ships’ hulls.


Report: DDG 51s heavily damaged by ‘bow slams’
Staff report
Posted : Sunday Oct 14, 2007 9:29:05 EDT

Thirteen Arleigh Burke-class destroyers have suffered “significant” structural damage in rough seas because designers didn’t account for the effect of “bow slams” on the ships’ hulls, Navy documents say — and fixing the problem could cost almost $63 million.

A Navy PowerPoint presentation, obtained by Navy Times, confirmed a report Thursday in the British defense publication Jane’s revealing the design problems in the Burke class.

Support beams and other structures inside the destroyers warp so much from the stress of withstanding high seas that they must be cut out and replaced, even in new ships — the destroyer Gridley, commissioned in February, already underwent repairs in September. The document listed the following ships as damaged: Arleigh Burke, Curtis Wilbur, Stout, Paul Hamilton, Stethem, Carney, Gonzalez, The Sullivans, Ross, McFaul, Higgins, Winston S. Churchill and Lassen.

“Damage ranges from local buckling of deck transverse beams and shell web frames and shell longitudinals resulting in several inches of permanent deformation,” said one slide in the presentation.

Internal structure warping is not uncommon among surface warships; the Navy’s cruisers and frigates have gone into shipyards for hull-stiffening repairs.

With each ship designed to serve for around 35 years, the Burkes are the Navy’s only destroyers in service. The first ship was commissioned in 1991, and shipyard Bath Iron Works of Bath, Maine, announced it has started work on the last, DDG 112, expected to join the fleet in 2011.


Article at: http://www.navytimes.com/news/2007/10/navy_ddgbowslam_071014w/

[ixion]

1. they didn't account for bow slams?

where the hell did they think it was going to be used? The bathtub? :shrug: :dunce:

[NYVet]

2. Dupe thread

You started a related thread at http://www.democraticunderground.com/discuss/duboard.php?az=view_all&address=259x5113

[unhappycamper]

3. Not really.

This article has more info than the last one.