• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.5
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• pp.577-584
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• 2019

Recently, CSB(Cable-Stayed Bridge) have been attempted to be atypical forms for landscape elements in Korea. CSB with new geometry need to analyze their characteristics clearly to ensure structural safety. This study's bridge is the S-shaped curved pedestrian CSB that has a girder with S-shape plane curve and reverse triangular truss cross section, inclined independent pylon, modified Fan type main cable and vertical backstay cable. Curved CSB can have excessive lateral displacement and moment when the tension is adjusted, focusing only on longitudinal behavior, such as a straight CSB. In order to analyze the effect of the cable on the lateral behavior of bridges, the cable is divided into two groups according to the lateral displacement direction of the pylon due to tension. The influence of the combination ratio of GR1 and GR2 on the girder, bearing, pylon, and vertical anchor cable was analyzed. When the tension applied to the bridge is 1.0GR1 plus 1.0GR2, In the combination of 1.2GR1 plus 0.8GR2, the stress on the left and right upper member of the truss girder and the deviation of the both were minimized. In addition, the horizontal force of the bearing, the lateral displacement and moment of the pylon, and the tension of the vertical backstay cable also decreased. This study is expected to be used as basic data for determination of tension of CSB with similar geometry.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2014.06a
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• pp.17-19
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• 2014

해양사고 발생 직후 2차적인 피해로의 확산을 방지하기 위한 조치로 사고선박을 안전한 장소로 이동하게 된다. 사고선박의 크기와 상태 그리고 해상조건을 고려하여 예선의 크기와 척수가 결정된다. 이 과정에서 사고선박의 선체저항을 계산하게 되는데, 기존의 이론식을 적용하여 계산하고 이에 대한 검증 단계로 예인실험을 실시하였다. 대상선박은 목포해양대학교 실습선 새유달호이며, 장력계, 외력 측정장치 등 실험장치는 실습선에 탑재하여 계측하였다. 실험장소는 목포해양대학교 인근 묘박지이며, 당시 풍속은 7m/s, 조류는 0.7m/s 전후이었으며, 횡방향 예인, 전방 2척 예인, 전 후방예인, 프로펠러고착, 예인속력의 변화 등 다양한 시나리오에 대하여 실험을 실시하였다. 장력의 계측은 예선의 예인삭을 사용하였으며, 실습선 선수미 비트에 장력계를 연결하여 측정하였고, 장력계의 최대측정 범위는 20톤을 사용하였다. 예인속력은 정지에서 3m/s까지 단계적으로 증가시키면서 해당 속력별 장력을 계측하여 속력증가에 따른 예인력을 확인하였다. 최종적으로 이론계산 결과와 실선실험 결과를 상호 비교하여 이론계산식의 유효성을 검증하였다.

• 한국지구물리탐사학회:학술대회논문집
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• 2005.05a
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• pp.139-144
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• 2005

Multichannel seismic survey has conducied along the South Scotia Ridge which is located in the northern part of Weddell sea, Antarctic sea, The South Scotia Ridge is part of continental crust extended from Antarctic Peninsula. It borders on Oceanic plates, the Scotia sea plate and Powell basin. Transtensional tectonics along the sinistral transform fault plate boundary led to the creation of the present tectonic geomorphology of the South Scotia Ridge. The fan-shaped deposits with angular unconformities in the central depression is interpreted as a divergent tectonic movement along the ridge.

• Journal of the Korean Geophysical Society
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• v.8 no.4
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• pp.215-219
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• 2005

Multichannel seismic survey has conducted along the South Scotia Ridge which is located in the northern part of Weddell sea, Antarctic sea. The South Scotia Ridge is part of continental crust extended from Antarctic Peninsula. It borders on Oceanic plates, the Scotia sea plate and Powell basin. Transtensional tectonics along the sinistral transform fault plate boundary led to the creation of the present tectonic geomorphology of the South Scotia Ridge. The fan-shaped deposits with angular unconformities in the central depression is interpreted as a divergent tectonic movement along the ridge.

• Journal of the Korean Society of Marine Environment & Safety
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• v.22 no.5
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• pp.373-379
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• 2016

Hydraulic forces on a vessel are changed according to the depth/draft ratio (h/d) during berthing or towing in a lateral direction. It is well known that lateral current force coefficient is dependent on the kinds of vessel in question. However, not much research exists about the characteristics of general ships, except for oil tankers, as suggested by the Oil Companies International Marine Forum (OCIMF). In this paper, lateral current coefficient related to h/d is analyzed in comparison with theoretical values and experiments with a 93m passenger ship. The estimated total resistance on the ship was 14.0 tons under an h/d of 1.6 with a lateral current force coefficient of 1.9. This was found to be similar to the measured value of 13.8 tons on the towing line in actual experiments. Resistances on the ship under an h/d of 3.0 was calculated to be 19.9 tons with a lateral current force coefficient of 1.3. Therefore, the lateral current force coefficient was expected to be 1.3 under an h/d of 3.0, in experiments measured value 20.0 tons. And the discharging currents did not affect the towing force if the towing line was over 30 m, since the towing resistance showed a similar tendency for changes in line length from 30 m to 60 m.

• Journal of the Korean Orthopaedic Association
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• v.56 no.6
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• pp.540-545
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• 2021

A transverse fracture is the most common type of displaced patella fracture requiring surgery. These fractures are commonly fixed with parallel Kirschner wires or screws that cross the fracture line, often with an additional tension band. Nevertheless, conventional fixation methods of patella fractures have prevalent complications caused by the protrusion of wires or pins. These complications necessitate additional surgery for hardware removal, increase medical cost, and can limit the function of the knee joint. This paper reports cases treated with a minimally invasive load-sharing percutaneous suture of the patella tendon. The procedure provides reliable fixation for transverse patella fractures, minimizes soft tissue injuries, preserves blood flow, and reduces postoperative pain. In addition, the procedure also reduces the irritation and pain caused by the internal fixture, thereby reducing the risk of restricted knee joint movement.

• Proceedings of the Computational Structural Engineering Institute Conference
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• 2009.04a
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• pp.450-453
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• 2009

본 논문에서는 지진하중을 고려하여 충분한 연성거동이 가능하도록 배근한 철근콘크리트 횡하중 저항 골조(내진상세)와 고정하중과 적재하중만을 고려하여 설계한 중력하중 저항 골조(일반상세)를 대상으로 외부기둥과 내부기둥에 연결된 보의 연쇄붕괴 거동을 평가하기 위한 실험을 수행하였다. 일방향 가력실험 결과에 따르면 내진상세의 경우 대변형 상태에서 보의 하단철근의 파단이후 상단 압축철근이 인장력을 부담하면서 전체 보 부재는 축인장력이 작용을 하면서 힘-변위 곡선은 상승하는 현수작용이 발현되었다. 그러나 일반상세의 경우 충분한 현수작용이 발현되기 전에 보의 주근이 정착된 외부기둥 접합부의 파괴로 인하여 저항내력이 감소하였다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2011.11a
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• pp.37-39
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• 2011

예선이 부선을 예인줄로 연결하여 운항할 시 예인줄에 걸리는 장력 및 형상을 예인줄을 다물체로 분할하여 모델링하였다. 이러한 예인줄 요소에 대한 횡동요를 제외한 5자유도 운동방정식을 구성하고, 각 요소들에 작용하는 힘을 정식화하여 연성 운동방정식을 도출하였다. 예인줄 요소들 간에는 예인줄의 재료 특성에 따른 강성을 가진 스프링과 감쇠장치로 연결하여 동력학적 조건을 부가하였고, 요소의 변형을 허용하는 형태로 운동학적 조건은 설정하지 않았다. 예인줄의 다물체 모델링의 검증을 위하여 단순 낙하, 직진, 사인파 형태로 지그재그로 움직이는 예선과 단순 항력체로 가정한 부선의 운동에 대한 시뮬레이션을 수행하였다.

• Journal of the Society of Naval Architects of Korea
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• v.34 no.3
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• pp.53-60
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• 1997

Generally, a safety estimation based on the buckling strength is carried out to evaluate the strength of plate members in the design process of ship hull structures and more accurate and efficient tool for the buckling strength estimation of enormous plate members of ship structure is naturally demended for saving design process. While, in the reason that the design codes of classification societies do not consider the various effects or include some effects roughly, considerate safe side results are suggested occasionally. In this study, advanced buckling strength estimation system prepared various classification buckling evaluation codes and new evaluation code considering the effects of in-plane tension, plate boundary condition, lateral load & residual stress is developed using the window management system of engineering workstation. Additionally maximum deflection estimation formula is equipped for the increase of fabrication reliability of thin plate ship structure. From this evaluation system, more reliable buckling safety of plate panel will be guaranteed in the ship hull design stage. In order to expand the use of this system pc version system will be developed sooner or later.

• Journal of the Korean Society of Fisheries and Ocean Technology
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• v.40 no.4
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• pp.311-318
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• 2004

It is very important for the safe navigation and fishing operation to ensure the hull response of a fishing vessel in rough seas. This is an experimental study on the dynamical characteristics of ship's motion during operating job and sailing in the real sea. The experiments were carried out on the small stern trawler in operating job and sailing, and then the ship's roll and pitch motion were simultaneously recorded by P/C according to the wave directions. From these data, the statistical properties and power spectra were obtained and the analysis of ship's motions in the both case were made. The results obtained are summarized follows : (1) The amplitudes of pitch motion don't appear a big different between trawl job and sailing, but at bow seas, its in sailing have a tendency to increase more than in trawl job. The amplitudes of roll motion appear a bog different between trawl job and sailing, but at beam sea, that slightly decreasing tendency. (2) The peak period of pitch motion in trawl job and sailing change, but that of roll motion don't change according to the direction of waves. (3) The warp tention cause the motion of hull to be reduce, if the tention of each side have a ballance.