文章基本信息

标题：波浪中を前進する鉛直円柱に加わる流体力についての実験的研究
本地全文：下载
作者：小寺山亘 ; 田代昭正
期刊名称：日本造船学会論文集
印刷版ISSN：0514-8499
电子版ISSN：1884-2070
出版年度：1982
卷号：1982
期号：151
出版社：The Japan Society of Naval Architects and Ocean Engineers
摘要：Hydrodynamic forces acting on a vertical circular cylinder moving forward with a constant velocity and making forced oscillations are measured. Wave forces on the moving cylinder in regular waves are also measured. The purpose of this investigation is improving the accuracy in estimation of the motion of an ocean structure in waves, and the reduced velocity and Keulegan-Carpenter number chosen in these experiments are larger than those in exper-iments for the structural vibration induced by the vortex.The measured force is compared with that with no advance velocity.The conclusions obtained are as follows;1) Steady drag coefficient C_DY0 of a cylinder forced to sway, nondimensionalized by foward velocity U and swaying velocity X, does not depend on K_C number but depend slightly on the advance velocity U.2) Oscillating drag coefficient C_DX1 of the cylinder does not depend on U and decrease with the decrease of K_c number at K_c<30.3) Steady drag coefficient C_D0 of a cylinder forced to surge does not depend on K_c number but depend slightly on U.4) Oscillating drag coefficient C_D1 of the cylinder does not depend on U and decrease with the decrease of K_c number at small K_c number.5) Steady drag coefficient C_DW0 of a cylinder in regular waves decreases with the increase of U.6) Oscillating drag coefficient C_DW1 is smaller than that with no advance velocity and is slightly smaller than that in steady flow.7) Inertia coefficient C_M is almost equal to that with no advance velocity