Apparatus for reducing vortex induced vibration

According to the present invention, an apparatus for reducing vortex induced vibration applied to an object comprises: a support means (20) rotationally supporting a main body (21) on an external surface of the object; and an air foil (30) installed in the shape of a wing by interposing a support ar...

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Bibliographische Detailangaben
Hauptverfasser:	RYU, MIN CHEOL, JOO, YOUNG SEOK, KANG, HYO DONG, JUN, DONG SU
Format:	Patent
Sprache:	eng ; kor
Schlagworte:	BLASTING EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING ENGINEERING ELEMENTS AND UNITS FIXED CONSTRUCTIONS FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOWOF GASES OR LIQUIDS FLUID-PRESSURE ACTUATORS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING HYDRAULICS OR PNEUMATICS IN GENERAL JOINTS OR FITTINGS FOR PIPES LIGHTING MEANS FOR THERMAL INSULATION IN GENERAL MECHANICAL ENGINEERING MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS PIPES SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING THERMAL INSULATION IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	According to the present invention, an apparatus for reducing vortex induced vibration applied to an object comprises: a support means (20) rotationally supporting a main body (21) on an external surface of the object; and an air foil (30) installed in the shape of a wing by interposing a support arm (32) in an opposite position on the support means (20). Therefore, as a vortex generated around a riser on a floating platform or the like is spaced, an effect caused by the vortex is reduced, and an addition for reducing VIV is attached to minimize an increase of a drag load. Therefore, fatigue life time of the riser can be increased. 본 발명은 와류에 의하여 대상체에 유발되는 진동을 저감하는 장치에 있어서: 상기 대상체의 외면에 메인바디(21)를 회전 가능하게 지지하는 지지수단(20); 및 상기 지지수단(20) 상에서 대향되는 위치에 서포트암(32)을 개재하여 날개형태로 설치되는 에어포일(30);을 포함하여 이루어지는 것을 특징으로 한다. 이에 따라, 부유식 플랫폼 등에서 라이저 주변에 발생하는 와류를 멀리 이격시킴으로써 와류에 의한 영향을 감소시키고 VIV 저감용 부가물 부착에 의하여 드래그 하중 증가를 최소화시켜 라이저의 피로수명을 증대하는 효과가 있다.