Page 116 - Practical Design Ships and Floating Structures

Practical Design of Ships and Other Floating Structures 91
You-Sheng Wu, Wei-Cheng Cui and Guo-Jun Zhou (Eds)
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HULL FORM DESIGN OF CARGO SHIP IN SHALLOW AND
STRONG CURRENT WATERWAYS

Li-Zheng Wane and Long-Fei Xi

Transportation Collage. Wuhan University of Technology Wuhan 430063, China

ABSTRACT

In China there are some rivers located in mountain area and its valley appears to be V or U type
alternatively, where there are many beaches, quick and disorder waters, narrow course, curved channel.
greater changes of depth in different seasons and so on. As far as the waterways with shallow and rapid
current having characteristics described above is concerned . it is a key problem how to development
new lines plan of cargo ship with high performance. In this paper a new afterbody of cargo ship in
Wujiang, one of the typical rivers with shallow and rapid current , which is called tunneled combined
with twin-stem is presented. By means of model test in tank., it is proved that in waterways with shallow
and rapid current, the tunneled combined with twin-stem is one of the better ship types with high
performance. It’s synthetical index of speed performance is smaller than tunneled stem which was
excellent ship types in Wujiang river in the past.

KEY WORDS
Waterways with shallow and strong current. High performance, Model test in tank, Hull form. Cargo
ship

1 PREFACE

In China there are some rivers located in mountain area and its valley appears to be V or U type
alternatively, where there are many beaches, quick and disorder waters, narrow breadth of course, curved
channel, greater changes of depth in different seasons and so on. As far as the waterways with shallow
and rapid current is concerned, it is a key problem how to development new lines plan of cargo ship with
high performance. In this paper a new hull form of cargo ship in Wujiang which is a typical river having
characteristics described above is presented by means of model test in tank.

2 DESIGN OF NEW AFTERBODY

2. I The Assumption of New Afterbody
Wujiang is a tributary of Yangtse River. According to the shipping practices of many years it is proved that the
afterbody with tunneled stern is better hull form of cargo ship in this River. The typical afterbody plan of “150t