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The Computation Method Research on Ultimate Torsional Strength of the Damaged Ship

Author: XuBin
Tutor: RenHuiLong
School: Harbin Engineering University
Course: Design and manufacture of ships and marine structures
Keywords: Thin-walled beams To reverse Warping normal stress Structural Damage Simple algorithm Ultimate torque
CLC: U661.43
Type: Master's thesis
Year: 2009
Downloads: 15
Quote: 0
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Abstract


Ordinary general hull has a sufficiently large anti - torsion ability , but when the ship collision , stranded or shot in the damaged hull structure , the torsional rigidity of the hull will be significantly reduced , and therefore , in order to improve the vitality of the ship , ship ultimate torsional strength is very necessary . Based on the theory of thin-walled beam torsional strength and ultimate torsional strength assessment of ship The main content of the work are as follows: torsion of thin-walled beam theory , the stress-strain relationship analysis of thin-walled bar torsion free torsion constraints , and derived a method for determining any profile torsion center . Reverse the theory of thin-walled beams using numerical methods to calculate the hull profile characteristics , the cross sections of the hull through the transfer matrix method coupled torsional strength assessment of the whole ship . Establish the finite element model , Finite Element Analysis of the torsional strength and ultimate torsional strength of the cabin . 4 . Use this article numerical analysis method based on thin-walled beam theory of a ship in a complete state and damaged state torsional strength assessment and comparison Authentication corresponding finite element solution . 5 lower bound theorem of plastic limit analysis hull plastic shear flow distribution profile in the limit state , according to the hull cross-section in the limit state of shear stress distribution calculated hull section limit torque .

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CLC: > Transportation > Waterway transport > Marine Engineering > Ship Principle > Ship structural mechanics > Ship structural strength
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