우리나라는 지리적 위치와 편서풍의 영향을 받아 필리핀이나 대만 근처에서 전향한 태풍이 매년 평균 2~3개 통과한다. 진해만은 우리나라의 대표적인 태풍 피항지로 알려져 있으며, 태풍 내습 시 피항 선박들로 가득차고 나중에는 주변 항로까지 묘박한 선박들로 포화상태에 이르게 된다. 이로 인하여 묘박중인 선박이 강풍으로 주묘가 발생될 경우에는 선박 간 이격거리가 짧아 충돌사고가 발생될 수 있으므로 진해만의 체계적인 묘박 안전관리가 필요한 실정이다. 따라서 본 연구에서는 진해만 묘박지 수심에 따른 선박 톤수별 주묘 한계 풍속을 제시하였다. 수심 20 m에서는 묘쇄를 7~9 Shackles 신출하였을 때 주묘 발생 한계 풍속은 48~63 knots, 수심 35 m에서는 46~61 knots, 수심 50 m에서는 39~54 knots로 평가되었다. 수심이 증가하면서 외력에 의해 파주부가 5 m 미만이 되는 상황이 발생하면서 주묘가 발생하는 한계 풍속은 4~8 knots로 큰 차이를 보였다. 또한 고파주력 앵커(AC-14형)가 설치된 선박이 재래형 앵커(ASS형)가 설치된 선박보다 주묘 한계 풍속이 더 크게 평가되었지만, 수심이 50 m로 깊은 곳에서는 고파주력 앵커를 사용하더라도 주묘가 쉽게 발생될 수 있는 것으로 확인되었다.
우리나라는 지리적 위치와 편서풍의 영향을 받아 필리핀이나 대만 근처에서 전향한 태풍이 매년 평균 2~3개 통과한다. 진해만은 우리나라의 대표적인 태풍 피항지로 알려져 있으며, 태풍 내습 시 피항 선박들로 가득차고 나중에는 주변 항로까지 묘박한 선박들로 포화상태에 이르게 된다. 이로 인하여 묘박중인 선박이 강풍으로 주묘가 발생될 경우에는 선박 간 이격거리가 짧아 충돌사고가 발생될 수 있으므로 진해만의 체계적인 묘박 안전관리가 필요한 실정이다. 따라서 본 연구에서는 진해만 묘박지 수심에 따른 선박 톤수별 주묘 한계 풍속을 제시하였다. 수심 20 m에서는 묘쇄를 7~9 Shackles 신출하였을 때 주묘 발생 한계 풍속은 48~63 knots, 수심 35 m에서는 46~61 knots, 수심 50 m에서는 39~54 knots로 평가되었다. 수심이 증가하면서 외력에 의해 파주부가 5 m 미만이 되는 상황이 발생하면서 주묘가 발생하는 한계 풍속은 4~8 knots로 큰 차이를 보였다. 또한 고파주력 앵커(AC-14형)가 설치된 선박이 재래형 앵커(ASS형)가 설치된 선박보다 주묘 한계 풍속이 더 크게 평가되었지만, 수심이 50 m로 깊은 곳에서는 고파주력 앵커를 사용하더라도 주묘가 쉽게 발생될 수 있는 것으로 확인되었다.
An average of two to three typhoons that occur in the Philippines or Taiwan pass through Korea each year owing to the influence of the geographical location and western winds. Because Jinhae Bay is known as Korea's representative typhoon refuge, it is filled with ships during typhoons and later beco...
An average of two to three typhoons that occur in the Philippines or Taiwan pass through Korea each year owing to the influence of the geographical location and western winds. Because Jinhae Bay is known as Korea's representative typhoon refuge, it is filled with ships during typhoons and later becomes saturated with ships anchored to the surrounding routes. If a strong wind drags an anchored ship, a collision accident may occur because of the short distance between the ships. Therefore, a systematic anchoring safety management of Jinhae Bay is required. In this study, the minimum wind speeds of a dragging anchor based on the water depths of Jinhae Bay anchorages were investigated. When 7-9 shackles were given, the minimum wind speeds were 48-63, 46-61, and 39-54 knots at depths of 20, 35, and 50 m, respectively. As the water depth increased, the length of the cable laid on the sea bed became shorter than 5 m owing to the external force, and the minimum wind speed showed a significant difference of 4-8 knots. In addition, ships with high holding power anchors (AC-14 type) had higher minimum wind speeds than ships with conventional anchors (ASS type). Finally, it was confirmed that at a depth of 50 m, dragging easily occurred even when a high holding power anchor was applied.
An average of two to three typhoons that occur in the Philippines or Taiwan pass through Korea each year owing to the influence of the geographical location and western winds. Because Jinhae Bay is known as Korea's representative typhoon refuge, it is filled with ships during typhoons and later becomes saturated with ships anchored to the surrounding routes. If a strong wind drags an anchored ship, a collision accident may occur because of the short distance between the ships. Therefore, a systematic anchoring safety management of Jinhae Bay is required. In this study, the minimum wind speeds of a dragging anchor based on the water depths of Jinhae Bay anchorages were investigated. When 7-9 shackles were given, the minimum wind speeds were 48-63, 46-61, and 39-54 knots at depths of 20, 35, and 50 m, respectively. As the water depth increased, the length of the cable laid on the sea bed became shorter than 5 m owing to the external force, and the minimum wind speed showed a significant difference of 4-8 knots. In addition, ships with high holding power anchors (AC-14 type) had higher minimum wind speeds than ships with conventional anchors (ASS type). Finally, it was confirmed that at a depth of 50 m, dragging easily occurred even when a high holding power anchor was applied.
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