• Title/Summary/Keyword: 유연보호튜브

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Mechanical Performance Study of Flexible Protection Tube for Submarine Cables (해저케이블용 유연보호튜브의 기계적 성능 연구)

  • Kyeong Soo Ahn;Yun Jae Kim;Jin-wook Choe;Jinseok Lim;Sung Woong Choi
    • Composites Research
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    • v.37 no.2
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    • pp.101-107
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    • 2024
  • Demand for submarine cable is increasing due to advances in submarine power transmission technology and submarine cable manufacturing technology. Submarine cable use various types of protective equipment to prevent problems such as high maintenance costs in the event of cable damage and power outages during maintenance periods. Among them, flexible protection tube is a representative protective equipment to protect cables and respond to external forces such as waves and current. The flexible protection tube is made of polyurethane 85A hyperelastic material, so the calculation of mechanical behavior is carried out using mechanical properties based on experimental results. In this study, a study was conducted to determine the bending performance and tensile performance of flexible protection tube through analytical methods. The physical properties obtained through the multiaxial tensile test of polyurethane 85A were used for the analysis. Bending and tensile performance were determined for the maximum bending moment standard of 15 kN·m and the tensile load standard of 50 kN. As a result, it was confirmed that when the maximum bending moment of 15 kN·m of the flexible protection tube occurred, the bending performance of the MBR was secured at 13 m and when a tensile load of 50 kN, it was applied the maximum vertical displacement was 968 mm, confirming that the tensile performance was secured.

Glottic and subglottic airway obtruction

  • 김영모
    • Proceedings of the KOR-BRONCHOESO Conference
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    • 2003.09a
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    • pp.113-113
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    • 2003
  • 성문과 성문하부의 기도 폐쇄는 위치 정도 원인 기간 등은 환자에 따라 다르고 그 치료방법 역시 다양하다. 주 원인으로는 기관내 삽관, 각종 외상 및 화상 등 을 들 수 있다. 이러한 질환의 치료 목적은, 기관내 튜브나 기관 캐뉼러 를 통하지 않고 비강을 통하여 자연스럽게 호흡할 수 있도록 기도를 유지 하면서 발성이 가능하고 기고 흡인 없이 연하가 가능하도록 하며 기침 반사가 원활하게 되도록 하는데 있다. 치료목적의 달성을 위하여 협착의 경우, 단계 즉 초기 단계 또는 성숙단계 여부, 위치, 정도, 범위 환자의 연령 전신상태 등을 술전에 잘 평가하고 수술도중의 소견과 술자의 경험이나 기호에 따라 적절한 치료법을 선택하여 치료해야 한다. 후두 외상에 의한 기도 문제는 다른 외상에 비해 흔하지 않은데 이는 연골의 유연성과 후두의 가동성 그리고 후두가 하악과 흉골사이에 위치하여 외상시 보호받게 되는 해부학적 특성에 기인한다. 여러 요인으로 인하여 진단이 늦어질 수도 있는데 이러한 경우 심각한 증상이 초래 되거나 치료가 의 시기가 지나 후두 또는 기관 협착, 발성장애등의 후유증이 유발 될 수 있다.

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Mechanical Performance Study of Piggy Back Clamp for Submarine Cables (해저케이블용 피기백 클램프의 기계적 성능 연구)

  • Yun Jae Kim;Kyeong Soo Ahn;Jin-wook Choe;Jinseok Lim;Sung Woong Choi
    • Composites Research
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    • v.37 no.2
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    • pp.108-114
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    • 2024
  • Due to the continuously increasing global demand for electricity, the demand for high-voltage submarine cables is also increasing. One of the issues that need to be addressed for submarine cables is the high production cost and expensive laying costs. Submarine cables exposed to the marine environment encounter external forces such as wave and current, leading to issues such as cable damage due to external factors or high maintenance costs in the event of an accident. Therefore, we are preparing for the uncertainty of the submarine environment through many protective materials and protective equipment. In this study, we examined the bending performance of piggyback clamps (PBC) and strap, which are representative protective equipment, in response to the submarine environment through analytical methods. To examine the structural performance of PBC, the bending performance were assessed under the maximum bending moment criterion of 15 kN·m for the flexible protection tube. As a result, it was confirmed that the structural performance regarding the bending moment of both PBC and straps was ensured.