Comparison of Sloshing-Induced Impact Pressures between 2D and 3D Tanks Sang-Yeob Kim , Ji-Eung Kim, Jae-Hoon Lee, Yonghwan Kim Department of Naval Architecture and Ocean Engineering Seoul National University. International Research Exchange Meeting on Ship and Ocean Engineering (Osaka University, 2013.12.20-21)
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Comparison of Sloshing-Induced
Impact Pressures between
2D and 3D Tanks
Sang-Yeob Kim, Ji-Eung Kim, Jae-Hoon Lee, Yonghwan Kim
Department of Naval Architecture and Ocean Engineering
Seoul National University.
International Research Exchange Meeting on Ship and Ocean Engineering (Osaka University, 2013.12.20-21)
• How many cycles is enough to get reliable result for regular
motion test ?
1.Sensitivity Study on the Time Window
• Model tests from 2D and 3D tanks can give the same results ?
• What are main differences between 2D and 3D tank tests ?
2. Comparison of sloshing pressures in 2D and 3D Tanks
Technical Issues in This Study
Sloshing Experimental Facility in SNU
• Motion Platform
3 Motion platforms (1.5, 5, 10 ton)
• Pressure Sensor & DAQ
Total 500 pressure sensors
Total 480 channel DAQ system
436TB Storage capacity
• High Speed Camera & PIV
2 high speed camera
3D PIV system
Pressure-image synchronization
system
Measurement System
Schematic Diagram of Measurement System
Data storage system Coupler DAQ board Motion platform and
controller
High speed camera
Pressure sensor Model tank
Motion platform Motion controller
Coupler
Data acquisition system
Monitoring system
Pressure sensors
Video recorder
Data storage server
Test 1
: Sensitivity Study of Time Window
ω : excitation frequency, ω0 : Frequency of the fundamental mode of sloshing
200 oscillations
200-1
500 oscillations
500-1
500 oscillations
500-2
200 oscillations
200-2
200 oscillations
200-3
200 oscillations
200-4
200 oscillations
200-5
1000 oscillations
1000
Filling Depth Excitation Amplitude
Excitation
Frequency
(ω/ω0)
0.95H 0.015L, 0.042L, 0.10L 0.7 – 1.3
0.70H 0.015L, 0.042L , 0.10L 0.7 – 1.3
0.50H 0.015L, 0.042L, 0.10L 0.7 – 1.3
0.25H 0.10L 0.7 – 1.3
0.15H 0.10L 0.7 – 1.3
Sensitivity Study of Time Window
Test Condition – Harmonic Excitation 2D Model Tank (1/40)