Main facilities


400m Experiment Tank


This is one of the largest towing tanks in the world (Length=400m, Width=18m, Depth=8m). It is being used for various model tests including very large crude oil carriers or super high speed vessels. The reinforcement of this facility since 2001 will enhance its capability to perform model tests under the conditions closer to actual sea states.

MITAKA No.3 Model Ship Experimental Towing Tank (Middle Towing Tank)


This towing tank has the dimensions of Length=150m, Width=7.5m, Water depth=3.5m and Maximum towing speed=5m/s. The water depth can be changed from 3.5m to 0.2m to carry out shallow water tests for harbors and bays. It has provided experimental data on the maneouvrability of very large ships in shallow water, especially its deterioration. The tank has a wave generator and a secondary carriage with a wind blower, for experiments in winds and waves. As a multi-purpose tank, it is used for tests of ocean structures and dynamic performance of ships. The speed control system of the towing carriage that made by a box-guarder type was renewed in 1995, increasing ease and accuracy of experiments.


Large Cavitation Tunnel


This tunnel is a closed-type depressurized circulating water tunnel with two exchangeable working sections used for experiments on pressure fluctuations, cavitation noise and erosion induced by cavitation on propeller blades working behind a ship model and for the development of high performance propuIsors.

Facility for life evaluation of ship strctural materials


This facility is composed of multi axial loading test systems, a long term corrosion fatigue test system and a severe environment corrosion fatigue test system. Results of the research on various fatigue phenomena are extensively applied for hull structural designs, construction, inspections, and hull maintenance control.

Ocean Engineering Basin


This basin is used for tests of offshore structures (length= 40m, width= 27m, depth= 2m). Waves and current can be generated, and a large towing carriage is equipped with a stationary subcarriage to measure the forces and a running subcarriage to trace the model.

Pulsating Wind Tunnel with Water Tank


This wind tunnel (length of test section 15m, width 3m, height 2m, maximum wind velocity 30m/sec) can generate a regular and irregular pulsating wind, and is equipped with a water tank to perfom model tests of ships and offshore structures under the coexistence of wind, wave and current.

Ice Model Basin


In the ice model basin, which is 35m long, 6m wide, and 1.8m deep, experiments are carried out on models such as icebreaking ships or offshore structures. The behavior of oil spilled under ice is also investigated.

Deep-Sea Basin

This basin has been composed of the Circular basin(depth 5m, effective diameter 14m, outside diameter 16m), the Deep pit(depth 30m, effective diameter 6m) and the High pressure tank(inside height 3m, inside diameter 1.1m, maximum pressure-proof 60MPa).The research for establishment of deep sea resources utilization technology and CO2 Deep-sea storage technology , etc. will be carried out at this basin.iCompletion schedule in 2001 fiscal yearj

Bridge Simulator for Navigational Risk Research

Enables simulations of every item related to ship handling operation and analysis of human behavior in marine environments by measuring human action and physiological data. It has ship models and display device for expressing ship motion in various situations such as berthing . It also has a motion platform with pitch and roll motion to express high sea condition.

Actual Sea Model Basin (under construction, scheduled for completion in FY2010)

This is a basin which is capable of reproducing ocean weather conditions such as waves and wind which are actually encountered by ships. Wave generating equipment with a width of 50cm will be installed around the entire periphery of the basin, making it possible to reproduce a variety of ocean weather conditions from the waves normally encountered by ships to anomalous waves. For the wind generating equipment, a moving bogey will be installed, making it possible to simulate ship navigation conditions.

FEM Analysis System for Marine Equipment / Large-scale Fatigue Test Machine (Osaka Branch)

The Osaka Branch has various facilities for the researches on the marine valves and piping, the EMC (Electro-magnetic Compatibility), and the structure, strength and NDI (non-destructive inspection) of FRP boats and materials. Using these facilities, the Branch conducts the joint and trusted studies with the manufacturers for marine equipment and small ship in western Japan where ship-related industry concentrates.

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Contact:Research Planning Division(info@nmri.go.jp)