FUJIWARA, Toshifumi

Title  Chief Researcher, Ph.D.
　
Speciality  Ship dynamics, Wind engineering
　
Personal history

Dr Toshifumi Fujiwara is a Chief Researcher in the National Maritime Research Institute (NMRI), Japan. He received a Bachelor of Engineering Degree with honours, 1992, Master of Engineering Degree, 1994 from Osaka Prefecture University and Ph.D. in the ship performance evaluation in the heavy sea, especially for the proposed new estimation method of wind loads acting on the ships, from the same university in 2006. He has the research works relating to the stability and the manoeuvrability of ships and had relevance for the discussion on rule making in Ministry of Transport, Japan and International Maritime Organization (IMO) for the ship maritime safety in 1998-2001. He joined the project of the development of new type sailing ship in 2002-2003. He stayed in the Ship Science, School of Engineering Sciences, University of Southampton, UK, in 2003-2004 as a Senior Research Fellow. Now he is interested in the time domain simulation of ship dynamics in the heavy sea.

1994.4 Ship Dynamics Division, Ship Research Institute, Ministry of Transport
1998.4 Maritime Technology and Safety Bureau, Ministry of Transport
2000.4 Ship Dynamics Division, Ship Research Institute (Return)
2001.4 Ship Dynamics Division, National Maritime Research Institute
2002.4 Chief Researcher, Manoeuvring and control group,
         Department of Maritime safety, National maritime research institute
2003.9-2004.9 University of Southampton, UK
2004.4 Chief Researcher, Manoeuvring and control group,
        Advanced Maritime Transport Technology Department, 
        National maritime research institute
2006.4 Chief Researcher, Marine dynamis group,
        Fluids Engineering Department, National maritime research institute
2008.4 Chief Researcher, Project Team for Ship Performance Index '10 mode at Sea',
        National maritime research institute

Research

• Research on causes of marine accidents and safety at seas (Environmental reproduction of a navigation bridge at rough seas) (2006-2009) 　　　　

• Research on prevention of the global warming due to CO2 (Development of the total evaluation system (10-mode at sea)) (2006-2008)

• Research on an optimal attitude control of high-speed vessels (2007-2008)

Main papers

• Estimation of Wind Forces and Moments acting on Ships, Journal of The Society of Naval Architects of Japan, Vol.183, 1998 (in Japanese)

• AN ESTIMATION METHOD OF WIND FORCES AND MOMENTS ACTING ON SHIPS, Proceeding of Mini Symposium on Prediction of Ship Manoeuvring Performance, 2001

• A Study on Estimaiton Method of Ship Rolling Motion with Flooding Water on Deck, Journal of The Kansai Society of Naval Architects, Japan, Vol.237, 2002 (in Japanese)

• On Estimation of Ship Rolling Motion with Flooded Water on Vehicle Deck、ISOPE2002、2002

• On Aerodynamic Characteristics of a Hybrid-Sail with Square Soft Sail、ISOPE2003、2003

• ON DEVELOPMENT OF HIGH PERFORMANCE SAILS FOR AN OCEANGOING SAILING SHIP、MARSIM03、2003

• Sail-Sail and Sail-Hull Interaction Effects of Hybrid-sail Assisted Bulk Carrier, Journal of Marine Science and Technology Vol.10-2, 2005, pp82-95

• Steady Sailing Performance of a Hybrid-sail Assisted Bulk Carrier, Journal of Marine Science and Technology Vol.10-3, 2005, pp131-146

• Roll Motion of Ro-Ro Passenger Ship with Flooded Vehicle Deck, International Journal of Offshore and Polar Engineering Vol.15-2, 2005, pp109-116

• New Estimation Method of Wind Forces acting on Ships on the basis of Mathematical Model, ISOPE2005, 2005

• A New Estimation Method of Wind Forces and Moments acting on Ships on the basis of Physical Component Models, Journal of the Japan Society of Naval Architects and Ocean Engineers Vol.2, 2005, pp243-255 (in Japanese) 

A new method to estimate longitudinal and lateral wind forces, and yaw and heel moments for ships is presented in this paper. The proposed estimation procedure is based on physical component models of the wind loads acting on ships. It is assumed that the wind forces consist of longitudinal- and cross-flow drags, and lift and induced drags. Each term of the components in the estimation equations is decided by the regression analysis using many wind tunnel experimental data. This estimation method has the same accuracy level to the authors' previous method, which was more accurate than the earlier reported prediction methods, and has more rational and simple forms of estimation rather than the previous one.

• Cruising performance of ships with large superstructures in heavy sea - 1st report: Added resistance induced by wind -, Journal of the Japan Society of Naval Architects and Ocean Engineers Vol.2, 2005, pp257-269 (in Japanese)

• Cruising performance of ships with large superstructures in heavy sea - 2nd report: Added resistance induced by wind and waves, and optimum ship routing -, Journal of the Japan Society of Naval Architects and Ocean Engineers Vol.3, , 2006, pp147-155 (in Japanese)

• Cruising Performance of a Large Passenger Ship in Heavy Sea, ISOPE2006, 2006

  The authors proposed a new estimation method of wind forces and moments acting on ships based on a physical-component-model of the wind loads. In this paper, using the wind loads estimation method, steady cruising performances of a large passenger ship are estimated in heavy sea in order to assess the strong wind and waves effects. Some important characteristics of the resistance increase in steady cruising condition in heavy sea for the large passenger ship are clearly revealed in the calculation. 

   

Address

　　　　Marine Dynamics Research Group
　　　　　　　Fluids Engineering & Ship Performance Evaluation Department
　　　　National maritime research institute
　　　　6-38-1 Shinkawa, Mitaka, Tokyo 181-0004 JAPAN
　　　　Phone: 81 422 41 3059
　　　　Fax: 81 422 41 3053
　　　　E-mail: fujiwara@nmri.go.jp