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A Research on Stability of Damaged Stiffened Panel on Deck

Author: MaJunYuan
Tutor: NieWu
School: Harbin Engineering University
Course: Design and manufacture of ships and marine structures
Keywords: Energy Method Stiffened panel Explosive load Structural stability Residual strength Critical stress
CLC: U661.42
Type: Master's thesis
Year: 2006
Downloads: 107
Quote: 1
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Abstract


Energy method has a very important position in the ship's structure analysis by energy principle to describe the structure of the balance and continuous deformation conditions , so as to solve the structural problems . It is unnecessary to consider the structural changes in the middle of the process , to simplify some of the complex issues . In this paper, on the basis of the energy method discussed two aspects : First, the deformation and damage of stiffened panels under impact loading and maximum load plate frame damage need . Second, the derivation of the crossbar member reinforced the overall buckling formula , and analyzed on the basis of the overall stability of the structure after damage . The vitality of the ship is an important performance indicators of the ship . Contact explosive and non-contact explosion fatal role in the destruction of the ships . Therefore correctly forecast the deformation and damage of naval panels subjected to blast loads is an important aspect of the assessment Ship Survivability . Given on the basis of the previous blast loads , ship stiffening board ship the basic structure of the plastic deformation analysis , deduced ship stiffened panels plastic deformation formula , the formula of calculation results with the empirical formula and the finite element results . Maximum impact load and damaged stiffened panel briefly described below. Residual strength after hull damage , whether it is a military ship or civilian vessels have very important significance . Because in order to carry out the relief and prevention of marine pollution , the hull should maintain an adequate level of residual strength . Residual stability of the structure is to be considered part of the residual strength of the hull plate frame is an important part of the hull , such as decks , floor, bulkhead , the side . The ultimate strength of the hull plate frame depends mainly on the following three aspects: ( 1 ) plate rack instability breaking strength ; (2 ) plate rack FAILURE strength ; (3 ) plate rack fatigue fracture strength . In this paper, from the engineering concepts , the main study the strength of one aspect of the problem . Deduced on the basis of the principle of energy , and gradually the overall instability of the stiffened panel critical stress formula , using Mathematica to write a program to calculate , we calculated the critical stress of stiffened panel under dilapidated conditions , the calculation results convergence .

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CLC: > Transportation > Waterway transport > Marine Engineering > Ship Principle > Ship structural mechanics > Analysis of the structure of the ship
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