Grounding resistance of unidirectionally stiffened double hulls.

116 Pages·1991·2.9 MB·en_US

by  McKenney, Timothy Lee.

GROUNDING RESISTANCE OF UNIDmECTIONALLY STIFFENED
DOUBLE HULLS
by
TIMOTHY LEE MCKENNEY
B.S. Naval Architecture and Marine Engineering., Massachusetts Institute ofTechnology
(1985)
SUBMITTEDTOTHE DEPARTMENT OF
OCEAN ENGINEERING
IN PARTIAL FUFILLMENT OFTHEREQUIREMENTS
FORTHE DEGREES OF
NAVAL ENGINEER
and
MASTER OF SCIENCEIN MECHANICAL ENGINEERING
atthe
MASSACHUSETTS INSTITUTE OF TECHNOLOGY
June, 1991
©
Timothy Lee McKenney, 1991. All rights reserved
The author hereby grants to MTT and the U.S. Government permission to
reproduce and to distribute copies ofthis thesis document inwhole or in part.

GROUNDING RESISTANCE OF UNIDIRECTIONALLY STIFFENED
DOUBLE HULLS
by
TIMOTHY LEE MCKENNEY
B.S. Naval Architecture and Marine Engineering, Massachusetts Institute ofTechnology
(1985)
Submittedto the Department ofOcean Engineering inpartial fulfillment ofthe requirements
forthe degrees ofNaval Engineer and MasterofScience inMechanical Engineering
ABSTRACT
The Oil Pollution Act of 1990, as well as the U.S. Navy's desire for increased
survivability, has focused ship structural designers' attention on alternative double hull
structures. Unidirectionally Stiffened Double Hulls (USDH) have surfaced as the most
promising structural designs due to theirproducibility. This paperexamines the ability of
USDH to withstand grounding damage. The extent ofhull penetration has been calculated
and related to the ship's gross characteristics, hull structure geometry, and the geometry of
the obstruction. The extent ofhull penetration and lifting forvarying reefheights and
USDH
spreading angles for a tanker is given as an example.