Estimation of above water structural parameters and wind loads on ships

ABSTRACT Regression formulae to estimate above water structural parameters for estimating wind load coefficients are proposed. The regression formulae work with quite limited information, ship type and length overall. Additional input, ship breadth, if available, can improve the precision. Root-mean square of residual ratio in error analysis confirmed the estimated parameters explain well characteristics of the above water structural shape of ships. Wind load coefficients of ships are estimated by Fujiwara's second method in which the structural parameters estimated by the regression formulae are used. Wind tunnel test data proved that the estimated wind load coefficients have comparable precision to those estimated using true parameters. Application of the regression formulae to ships including those of whose sizes exceed the fleet that the formulae are based on confirmed its wide range of applicability.

[1]  C Aage.  WIND COEFFICIENTS FOR NINE SHIP MODELS , 1971 .

[2]  Fujio Kaneko,et al.  Models for estimating grounding frequency by using ship trajectories and seabed geometry , 2012 .

[3]  Bernd Wagner,et al.  Windkräfte an Überwasserschiffen , 1967 .

[4]  R. M. Isherwood.  WIND RESISTANCE OF MERCHANT SHIPS , 1972 .

[5]  W Blendermann,et al.  ESTIMATION OF WIND LOADS ON SHIPS IN WIND WITH A STRONG GRADIENT , 1995 .

[6]  L L Martin,et al.  SHIP MANEUVERING AND CONTROL IN WIND , 1980 .

[7]  Keiichi Karasuno,et al.  ANALYSIS OF VESSELS' WIND FORCES THROUGH THE UTILISATION OF A PHYSICAL-MATHEMATICAL MODEL-II , 1990 .

[8]  G. Aertssen,et al.  Wind tunnel tests on a model of a car-ferry , 1968 .

[9]  H Eda.  LOW SPEED CONTROLLABILITY OF SHIPS IN WIND , 1968 .

[10]  James H. VanZwieten,et al.  Response characteristics and maneuverability of a small twin screw displacement hull vessel in seas , 2008 .

[11]  Toshifumi Fujiwara,et al.  A New Estimation Method of Wind Forces and Moments acting on Ships on the basis of Physical Component Models , 2005 .

[12]  Engin Gücüyen,et al.  Estimation of compression strength of polypropylene fibre reinforced concrete using artificial neural networks , 2013 .

[13]  Werner Blendermann,et al.  Wind Loads on a Passenger/Car Ferry by CFD Computations and Wind Tunnel Tests , 2011 .

[14]  C. Guedes Soares,et al.  Wind loads on marine structures , 1999 .

[15]  T. Fujiwara,et al.  Estimation of Wind Forces and Moments acting on Ships , 1998 .

[16]  Yoshiho Ikeda,et al.  Cruising Performance of a Large Passenger Ship in Heavy Sea , 2006 .