Wave motion tank < Facilities and Equipment in Yokosuka Headquarters < Research Vessels, Facilities and Equipment < About JAMSTEC

The tank
This tank is provided with ferro-concrete walls, one side of which has five one-meter square viewing windows for observing underwater motions of the experimental model.
Dimensions：40m (length) × 4m (width) × 2m (depth)
Wave generator
This wave generator consists of eight segmented wave generator plates, whose cyclic motions can produce rhythmic or arrhythmic waves of various wave heights and wavelengths. Wave reflections off the wave generator plates are kept to a minimum. Control of absorption permits longer run times.

Item Explanation

Model Flap servomotor, timing belt drive

Wave height max. 0.2m (frequency 1.1～1.5sec)

Period of waves 0.5～4.0sec

Wave generator plates SUS, 0.5m (width) × 8plates
Gauge trolley
The gauge trolley slides over the tank. A variety of models can be attached to the trolley. Running the trolley at different speeds allows monitoring and analysis of characteristics such as water resistance to various motions.

Item Explanation

Model Analog uniaxial two-wheel drive

Speed 0.2～2.0m/s

Acceleration rate within ±3%F・S
Wave Absorber
This beach-type wave absorber comprises a slope with a sponge-type absorber surface.

Item	Explanation
Model	Flap servomotor, timing belt drive
Wave height	max. 0.2m (frequency 1.1～1.5sec)
Period of waves	0.5～4.0sec
Wave generator plates	SUS, 0.5m (width) × 8plates

Item	Explanation
Model	Analog uniaxial two-wheel drive
Speed	0.2～2.0m/s
Acceleration rate	within ±3%F・S

1): Tests of flow and wave effects on various marine structure models
2): Tests of the kinematic characteristics of mobile underwater objects
3): Characteristic tests involving wave energy generators and buoys in waves
4): Various performance tests for wave absorbers, oil fences, etc.
5): Various in-tank tests involving special operation vessels
6): Characteristic tests involving various marine devices