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A cable fairing is a structure attached to a towed cable designed to streamline the flow around the cable, primarily in marine environments. Cables are faired primarily for two reasons: (1) to reduce normal drag and thus achieve more depth for a given cable scope and speed; and (2) to eliminate cable vibration caused by vortex shedding, commonly known as cable strum.〔R. D. Blevins, "Flow-Induced Vibration" (Second Edition). New York: Van Nostrand Reinhold, 1990, p. 91.〕 ==Types of cable fairing== There are several major types of cable fairing: *Hard fairing: essentially a streamlined teardrop-shaped shell clamped in sections over the cable;〔Patent 4,567,841 “Fairing assembly for towed underwater cables.”〕 *Ribbon fairing: flexible ribbons attached to the cable that assume a streamlined shape when towed;〔Patent 3,696,599 “Cable fairing system.”〕 *Hairy fairing: similar to ribbon fairing, but the “ribbons” take the form of hair-like flexible structures.〔Patent 4,084,065 “Antistrumming cable.”〕 All cables (faired or unfaired) have hydrodynamic loading functions.〔R. Folb, “Experimental determination of hydrodynamic loading functions for ten cable fairing models.” Report number DTNSRDC-R-4610, David W. Taylor Naval Ship Research & Development Center, 1975.〕 These describe the variation in drag coefficient as a function of angle with respect to the flow. As an example, the loading function for the normal drag coefficient of an unfaired cable, represented as a flexible circular cylinder, is ( means that the cable is normal to the flow). 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Cable fairing」の詳細全文を読む スポンサード リンク
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