Offshore engineering basin

Wave generation:

Regular and irregular long or short crested waves up to 1.0 m high, depending on wave frequency and spectrum. 168 individual, vertically adjustable, hydraulically actuated (1800kW) wavemaker segments. Three articulation modes, flapper ±15 degrees, piston ±400mm, and combined. Wave absorbers are vertical perforated sheets on none wavemaking walls.

Current generation:

10 lanes of independently hydraulically controlled thrusters through sub-floor channels generate a current across the full tank width. Maximum surface current 0.75 m/s (depends on water depth).

Wind generation:

Horizontal array of 12 analog controller fans, horizontal and vertical tilt, independently controlled 3.7kW DC motor for each fan.

Model size:

Ship models up to 4.5 m in length, offshore structures 0.5 – 6 m in diameter.

Data acquisition:

VMS and Windows NT Client/Server System with NEFF and in-house designed signal conditioning. 256 channel capability with data rates up to 100 kHz, 16 bit resolution.

Specialized instrumentation:

• Dedicated 4 camera/recorder video system with common clock and run name annotation. Cameras are movable with options for underwater and surface tests.
• 2 Dedicated Qualysis model tracking systems, full tank system for seakeeping and manoeuvring, close in overhead system for high accuracy moored ships and structures.

Tests performed:

• Seakeeping, manoeuvring and station keeping of ships; tow out, set down and operation of moored and bottom founded offshore structures.