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Recently, we developed program of sound propagation in ocean water using the parabolic equation (PE) method based on wave theory. This method accurately analyzed long-range sound propagation in deep w...
In the dynamic positioning control and thrust allocation system of the vessels, it is difficult to obtain an optimal solution in real time because of inherent non-linearity, and development of a relia...
In order to develop a resistance test method for high speed planing craft using a very small model, the scale effects on wetted surface area, frictional resistance and pressure forces acting on a smal...
This paper describes recently developed general-purpose optimization system, in which users are able to set up the optimization problem without knowledge of system coding. Currently two optimization a...
The shape and swimming method of fish vary in accordance with their environment and fish have high maneuverability in water. It is believed that studies on how fish swim can suggest a new effective pr...
The authors proposed a set of closed-form simple formulae to estimate the ultimate strength of a continuous stiffened panel under combined biaxial thrust and lateral pressure. This paper extends the a...
Finite element method is a powerful tool for predicting welding distortion. However, the mechanical phenomena in welding are strong non-linear transient problems and thermal-elastic-plastic FE analysi...
Wake wash is one of the serious problems for high speed ships, because it may cause damage on the coastal aquaculture using rafts or nets. Since some important parts of high speed ships are catamaran,...
We propose a new navigation system to decrease fuel oil consumption and CO2 emission from ship. To decrease them it is important to avoid rough seas and to reduce the speed of ship. Therefore the syst...
This paper propose the new method called “Random Pattern Refractometry Technique” which is possible to measure the unsteady density fields in stratified flows. In this method, the gradient vector fiel...
Sugi bark sorbent (SBS), which is recycled waste, is comparable to commonly used petroleum products in performance and cost and has lower environmental loads. It has been commercially produced since 2...
This paper, for the first time, describes development and demonstration of a CAD/CFD/optimizer-integrated simulation-based design (SBD) framework by introducing an advanced CAD system direct control a...
To estimate the performance and risk of an icebreaker, we are developing a numerical simulator for icebreaker performance under conditions that many ice pieces colliding and scraping against the icebr...
An affix-type multipoint pressure sensor was developed by using the Fiber Bragg Grating (FBG) technology. In the 1st report, the measurement system of FBG pressure sensor was described and the perform...
A time domain analysis method of Vortex Induced Vibration (VIV) was developed for risers and towing pipes with curvature. Risers are increasingly installed in deepwater and catenary shape is used util...

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