Title :
Field Experimental Study on Vortex-Induced Vibration Behavior of the Drill Pipe for the Ocean Borehole Observatory Installation
Author :
Kitada, Kazuya ; Araki, Eiichiro ; Kimura, Tomohiro ; Mizuguchi, Yoshikazu ; Kyo, Masanori ; Saruhashi, Tomokazu ; Sawada, I. ; Namba, Yuto ; Kinoshita, Moto
Author_Institution :
Earthquake & Tsunami Res. Project for Disaster Prevention, Japan Agency for Marine-Earth Sci. & Technol. (JAMSTEC), Kanagawa, Japan
Abstract :
We conducted two field tests aboard the Drilling Vessel Chikyu (D/V Chikyu) in areas of strong ocean currents (i.e., Kuroshio, Japan) during the March 2010 CK10-01 cruise. The relationship between the amplitude of the vortex-induced vibration (VIV) and the ocean current and ship drift speed were investigated to establish a VIV control method for the ocean borehole observatory installation in the Nankai Trough. These tests demonstrate that the ocean current and ship drift speed mainly control the drill pipe VIV. We find that to install sensitive sensors in a strong current area and avoid damage, the key factors are: 1) lowering the sensor assembly in a low current area; and 2) managing the drift speed of the drilling vessel.
Keywords :
drilling (geotechnical); pipes; sensors; vibration measurement; vibrations; vortices; D-V Chikyu; Drilling Vessel Chikyu; Japan; Kuroshio; March 2010 CK10-01 cruise; Nankai Trough; VIV control method; drill pipe; drill pipe VIV; field experimental study; field test; ocean borehole observatory installation; ocean current; ocean currents; sensor assembly; ship drift speed; vortex-induced vibration behavior; Acceleration; Accelerometers; Assembly; Marine vehicles; Monitoring; Oceans; Vibrations; Earthquakes; long-term borehole monitoring; ocean borehole observatory; subduction zone process; vortex-induced vibration (VIV);
Journal_Title :
Oceanic Engineering, IEEE Journal of
DOI :
10.1109/JOE.2012.2213973
