• Proceedings of the Korea Information Processing Society Conference
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• 2023.11a
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• pp.289-290
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• 2023

턴버클(turn buckle)은 컨테이너선의 컨테이너 유실을 방지하기 위한 고박 장치이다. 컨테이너선의 항해 중 발생하는 진동을 비롯한 황천과 같은 상황 등은 고박된 턴버클의 회전과 턴버클 jaw bolt의 유실을 유발시킨다. 이러한 상황이 지속적으로 누적되어 턴버클에 영향을 미치는 경우 제대로 컨테이너를 고박하지 못해 붕괴로 이어질 수 있다. 이를 방지하기 위해 턴버클의 회전 검출과 jaw bolt의 유실 여부를 yolov5를 통해 학습하여 턴버클이 회전하는 경우와 jaw bolt의 유실 여부를 실시간으로 인지한다. 이를 통해 24시간 무인으로 턴버클을 감시하는 영역이 생김으로서 선원들의 고박 감시구역이 줄어드므로 선원들에게 주어진 과도한 업무를 줄여주는데 의의를 가진다.

• Nuclear Engineering and Technology
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• v.17 no.2
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• pp.105-115
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• 1985

The axial height-dependent transverse buckling is derived from 3-dimensional depletion file in steadystate conditions. For transient conditions a physical correlation is developed based on the linear relationship existing between the responses of in-core and ex-core detectors. The use of this model greatly improves the reliability of a 1-dimensional diffusion theory program in Predicting the axial power transients accompanying large variations of control rod positions.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.27 no.9
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• pp.1451-1456
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• 2003

In code roll forming processes, the sheet metal strip is gradually and successively bent into a desired profile. Occurrence of buckling is one of the major defects. Buckling may occur due to longitudinal stress and it is difficult to predict buckling behavior. In this study an analytical method for buckling behavior during roll forming is proposed. All numerical simulations are performed by finite element analysis. The behavior of buckling can be predicted with the simulation modeling of the finite element method.

• Korean Chemical Engineering Research
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• v.57 no.4
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• pp.519-524
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• 2019

Even though stainless steel foil is not a highly efficient material for film-type solar cell, it has strong passivation capability without additional process. In this study, silicone resin was employed during a-Si:H thin film solar cell fabrication for the purpose of planarization and electrical insulation. In the first stage of process, silicone resin was coat onto the stainless steel (STS) using spin coater with thickness of $2{\sim}3{\mu}m$ and followed by aluminum deposition using ion beam application. Unexpectedly buckling was formed during aluminum deposition process. After subsequent fabrication processes, solar cell performance was evaluated. In voltage-current data, slight increase of cell performance was obtained and interpreted by the increase of light scattering.

• Proceedings of the Korean Vacuum Society Conference
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• 2004.08a
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• pp.158-158
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• 2004

• Journal of the Korean Society for Precision Engineering
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• v.30 no.9
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• pp.983-990
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• 2013

Evaluation of the structural analysis for a 70/15 ton${\times}$105 m LLC (Level Luffing Crane) was conducted with an FEM Tool. Due to a discordance of the modeling and element type, the LLC was progressively analyzed after dividing it into the boom, main structure and rocker. All loads such as slewing, traveling and wind load, etc., that are indicated in the reference standards, were inputted as various severe conditions of the LLC. The deformation, equivalent stress(Von Mises stress), buckling characteristics were evaluated for the LLC structures. The stress concentrated areas over the allowable stress were identified, and reinforcement work was performed with a stiffener.

• Journal of Sensor Science and Technology
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• v.15 no.1
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• pp.47-52
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• 2006

This paper describes the design, fabrication and characteristics of a buckling microvalve using a MCA (multilayer ceramic actuator). The mechanical and fluidic analysis are done by finite element method. The designed structure is normally closed microvalve using buckling effect, which is consist of three separate structures; a valve seat die, an actuator die and a small piezoelectric actuator. The flow rate of the fabricated MCA valve was 0-8.13 ml/min at the applied pressure of 0-50 kPa. Maximum non-linearity was 2.24 % FS at a duty cycle of 50 %. The maximum pressure was 230 kPa and the leak rate was $3.03{\times}10^{-8}\;Pa{\cdot}m^{3}/cm^{2}$ at a supply voltage of 100 V.

• Journal of the Korea institute for structural maintenance and inspection
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• v.14 no.3
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• pp.131-137
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• 2010

12 trial-scale wall panels are tested and evaluated to investigate the ultimate load capacity of axially loaded concrete walls with various opening configurations. The experimental tests have been undertaken to obtain data for the modification of existing equations. A new design equation has been generated using the precise test data and it incorporates the unique length factors. This new design equation for concrete walls with openings is then compared with existing code formulae.

• Proceedings of the Korea Information Processing Society Conference
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• 2023.11a
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• pp.1088-1089
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• 2023

컨테이너선의 컨테이너 유실이 빈번한 상황 속에서 이를 방지하고자 유실에 영향을 미칠 수 있는 분야 3 가지를 선정했다. 센서 최적화 알고리즘, 턴버클 회전 감시, 컨테이너 외부에 작용하는 힘의 합이 3 가지를 합하여 컨테이너 유실 방지를 위한 연구를 진행했다. 센서 위치의 최적화를 통해 총 컨테이너의 20%만 센서만 부착하여도 모니터링이 가능하여지도록 만들어 물리적, 경제적 비용을 절감할 수 있다. 이를 토대로 부착된 카메라를 통해 턴버클의 풀림을 관측하여 선원의 감시구역을 35% 정도 줄여주며, 라싱에서 지탱할 수 있는 상태의 범위를 넘어서는 식을 통해서 컨테이너의 유실 가능성이 어느 정도인지 확인이 가능해지도록 한다.

• Journal of the Korean Society for Precision Engineering
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• v.19 no.9
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• pp.98-105
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• 2002

Some materials exhibit a rising K-R curve, while the K-R curve for other materials is flat. The shape of the K-R curve depends on material behavior and, to a lesser extent, on the configuration of the cracked structure. The K-R curve for an ideally brittle material is flat because the surface energy is an invariant material property. However, the K-R curve can take on a variety of shapes when nonlinear material behavior accompanies fracture. Five different hot-rolled thin plates are tested to investigate K-R curve behavior. A special experimental apparatus is used to prevent specimens from buckling.