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| Home > Key Services > R&D > Joint Research |
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Additionally, KR is providing assistance to improve the technical competitiveness of Korea by actively participating in the research projects sponsored by the Government.
The some of the joint researches undertaken by KR are |
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(Co-research Organization : Korea Advanced Institute of Science and Technology) |
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Recently, the limit state design using theoretical simplified methods has been introduced into the stiffened panel of hull girder.
The nonlinear finite element analysis is the most effective tool for the verification of ultimate strength obtained from the simplified methods. In this study, the nonlinear F.E.A program using only the quadralaterial element (4 node, 8 node) and triangular element (3 node, 6 node) will be developed.
This code will be able to solve the large displacement and strain problem with material nonlinearity and calculate eigen values of buckling modes.
Also, this nonlinear F.E.A program will be utilized to develop the rules of buckling and ultimate strength for imperfect stiffened panel under axial compression and lateral pressure |
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(Co-research Organization: DSME, SHI, HHIC, HHI, KIMM and Bu-Kyung National University) |
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In order to increase the convenience for cargo loading for containers and pure car carriers, the recent tendency has been the widen the bow flare angle.
This raises the flare slamming pressure excessively and causes structural damages. Nothing the problems, Korean Register of Shipping, with four big shipbuilding companies(Daewoo, Samsung, Han-Jin, Hyundai), KIMM and Bu-Kyung university, had carried out the first part of research on "Structural assessment for bow flare slamming".
During this research(2000.10∼2001.9), the program of calculating flare slamming impact pressures and structural formula based on static structural analysis were developed.
The procedure and the program were subsequently used in the damage structural analysis for several present vessels.
The second part of this research(2002.3∼2003.8) was launched on march of 2002. During the course of this on-going second research, the time history model for flare slamming load and dynamic and quasi-static elastic-plastic structural response subjected to the flare slamming loads will be estimated |
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Current classification society rules for the longitudinal strength are based on the elastic section modulus.
However, the ultimate strength analysis for hull girder is necessary to investigate the cause behind the sunken vessels to determine whether they had enough reserve strength to withstand the most extreme sea loads due to heavy weather at the time of the incident.
Recently the unified strength requirements by IACS have been established based on the ultimate strength capacity of the considered structures such as the transverse bulkhead and hatch cover for bulk carriers.
For the ultimate strength analysis of the aging vessels, the corrosion condition at the time of the incident has to be considered.
To this end, it is necessary to develop the program to evaluate the ultimate strength considering corrosion degradation.
Rule formula for the ultimate hull girder strength will be developed through series calculation for various ship types using the |
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Ships navigating in rough sea frequently experience deck wetness from extreme bow motion. The green water strikes the deck and deck structure causing extremely high impact pressure on the deck's structures.
If a ship is not properly designed and constructed to withstand this repeated extreme pressure, the structural damage can occur.
Such damage can be costly, i.e., expensive, time consuming repairs or reconstruction may be necessary.
In order to predict the impact pressure on a ship's bow and application of green water to design, KR synthesized on the following; calculation of relative motion between free surface and ship's bow, flow simulation of green water, calculation of impact pressure and structural design in consideration of impact pressure.
During this research, KR developed the program for calculation of deck wetness load.
The computer program will be verified through model test |
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Recently, as the amount of oil transported in sea increase, large scale oil spill accidents such as due to Sea Prince, No. 1 yuil and No. 3 Osung increase near coastal region.
This indicates that our country is not free from oil spill problem. In this study, FSA methodology is applied to collision problem of tankers.
The objective of this study is to evaluate the risk of oil spill of tankers by use of FSA, and to develop measures to reduce the risk.
It is expected though this study that the risk of oil spill in the coastal areas is reduced. |
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