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7KH)XWXUH RI The Future Of Ship Design ,QWURGXFWLRQ Dear Colleague, The Future of Ship Design is intended for naval architects, marine engineers and for professionals working with the development of newbuilding ship projects from first feasibility studies through project and contract design into planning, basic and detail design. Working and design methods are also considered. The authors are experienced naval architects, marine engineers, mechanical engineers and electrical engineers, all working at Deltamarin Ltd on the date of publishing. The background of the is in the Finnish shipbuilding as many of them have been working at the Finnish shipyards. All the authors have international experience mainly from European shipbuilding. This experience covers consulting, design and engineering tasks for various shipping companies, shipyards and suppliers as well s supervising and commissioning tasks of newbuildings and conversions. The Future of Ship Design sets out to inform the practising Naval Architect and Engineer of the latest design techniques at his disposal, and then puts these in context by quoting case study material. Attention is paid to the important aspects of the hydrodynamics, machinery, structure and equipment design considerations, vital parts of the ship design mix. The tremendous technical development we have faced in ship design during the last decade issues us as designers a big challenge for the 21st century. New technology has been introduced faster than ever before in our industry. The issue is to maximise the efficient revenue generating space at minimised investment and running costs but taking into account availability and environmental impacts as well. The tendency is clear and promising, new products and innovations are introduced and completely new ship configurations can he developed based on new system and machinery products on the market. It is important to understand and consider the life cycle costs but taking into account possible additional revenue when considering new configurations. Typical case studies are handled showing the importance of a techno-economic design approach. Finally innovative design techniques available today and signifying a quantum leap in the ship design and project coordination in the early 21st century are discussed. I hope this book will offer a platform for further exchange of valuable information in our common effort for more efficient products: ships for the 21st century. Yours sincerely, Markku Kanerva DELTAMARIN LIMITED 7KH)XWXUH2I6KLS'HVLJQ ,QWURGXFWLRQ Authors: Markku Kanerva, M.Sc. (Nav. Arch.), Pertti Arkke, M.Sc. (Nav. Arch.), Juha Hanhinen, M.Sc. (Nav. Arch.), Kyösti Herrala, B.Sc. (Mech. Eng.), Matti Huhtala, M.Sc. (Nav. Arch.), Seppo Kalske, D.Sc. (Tech.), Gustav Lindqvist, M.Sc. (Tech. Physics), Janne Luukkonen, M.Sc. (Nav. Arch.), Ilkka Mikkonen, M.Sc. (Information Technology), B.Sc. (Nav. Arch.), Jan-Olof Nordling, B.Sc. (Mech. Eng.), Jari Nurmi, M.Sc. (Mech. and El. Eng.), Esa Pöyliö, B.Sc., Tage Revahl, B.Sc. (El. Eng.), Harri Salama, Tech., Kalle Senvall, Tech. Compiled by: Deltamarin Limited Purokatu 1 FIN-21200 Raisio Finland. Tel: +358 2 4377 311 Fax: +358 2 4380 378 e-mail: [email protected] Electronic edition compiled by: Ilkka Rytkölä Published by: MPI Group 4 Hubbard Road Basingstoke RG21 6UH, UK Tel: +44 (0)1256 840444 Fax: +(0)1256 817877 e-mail: [email protected] www.mpigroup.co.uk Neither the publishers or the authors, editors and contributors and their employing organisations, nor any persons acting on behalf of them a) makes an warranty, express or implied, with respect to the use of any information, apparatus, method or process described in this publication or that such use may not infringe privately owned rights or b) assume any liabilities with respect to the use of, or for damages resulting from the use of any information, apparatus method or process disclosed in this publication, and the use of any such materials, processes or methods is solely at the risk of the user. Data contained within this publication is protected by copyright. All rights reserved. No part of this publication may he reproduced, stored in a retrieval system, or transmitted in any form or by any means electronic, mechanical, photocopying, recording or otherwise without the prior permission of Deltamarin Limited. 7KH)XWXUH2I6KLS'HVLJQ ,QWURGXFWLRQ '(6,*1*8,'(/,1(6 *HQHUDO +XOO)RUPVDQG+\GURG\QDPLFV 1.1.1 Basic parameters 6 1.1.2 Hull form characteristics 9 1.1.3 Appendages 14 1.1.4 Rudder 19 1.1.5 Seakeeping 23 1.1.6 Conclusions 32 3URSXOVLRQ 1.2.1 Powering performance 34 1.2.2 Propeller diameter and location 37 1.2.3 Shallow water and wash effect 39 1.2.4 Air ventilation 39 1.2.5 Pod propulsion 40 0DFKLQHU\6\VWHPV 1.3.1 Machinery selection 42 1.3.2 Fuel selection 46 1.3.3 Electric balance 49 1.3.4 Power availability 52 1.3.5 Ancillary services 58 6758&785(6$1':(,*+7 '$0$*(6$)(7< $8720$7,21(/(&75,&$1'1$9,*$7,21 1.6.1 Machinery Automation 79 1.6.2 Electric 81 1.6.3 Navigation Bridge 89 67$7,67,&6()),&,(17722/)25352-(&7'(9(/230(17 '(6,*1(;3(5,(1&( *HQHUDO 3URMHFW0DQDJHPHQW 3URMHFW&RQWURO6\VWHPIRUD7XUQNH\6XSSO\ 3URMHFWDQG%DVLF'HVLJQRIP &KHPLFDO3DUFHO7DQNHU 7KH)XWXUH2I6KLS'HVLJQ ,QWURGXFWLRQ 'LHVHO(OHFWULF3RZHUHG5R5R3DVVHQJHU)HUU\ZLWK/DUJH/RZHU +ROG +DQG\6L]H)HUULHV 0$&+,1(5<&216,'(5$7,216 *HQHUDO 'LHVHO(OHFWULF7DQNHUV *DV7XUELQHVLQ3DVVHQJHU&UXLVH9HVVHOV )DVW)XOO'LVSODFHPHQW)HUULHV '(6,*10(7+2'6 7KH)XWXUH2I6KLS'HVLJQ 'HVLJQ([SHULHQFH 'HVLJQ*XLGHOLQHV *HQHUDO This chapter is a collection of practical experience further developed into practical design guidelines. They concentrate on the typical naval architectural and marine engineering problematics in developing a new design. These guidelines are intended for helping the designer or project engineer to make the first approach and later on when the design is available to enable easy cross checking. Historic trends are also explained when they can be used as general guidelines in developing future ship configurations. Items covered are the most typical problematic areas in ship design. Examples shown are taken from typical ro-ro ships, ro-ro passenger ferries, passenger cruise ships and other similar twin-screw ships; product tankers, chemical carriers and other single screw ships are covered as well. +XOO)RUPVDQG+\GURG\QDPLFV %DVLFSDUDPHWHUV The purpose of the hull form is to carry the defined load in accordance with the given transport task. As such it sounds simple but design of an efficient hull form consists of a great number of parameters and conditions, which have to be taken into account. The tendency has been towards higher capacity, which has meant bulkier ships above waterline and under waterline, towards higher block coefficient. Another clear tendency has been towards higher speeds. Average contract speed for all ships above 1000 grt has increased by about one knot within the last fifteen years. For some special ship types, such as container feeder ships, ro-ro ships and ferries the increase has been several knots. At the same time also the main dimension ratios have changed remarkably, the length-beam ratio has decreased, in some cases even below 5 and the beam- draught ratio has increased: for example for ro-ro passenger ferries from 3,0-3,5 up to 4,5-5,0. Up to the end of the 70’s the hull forms were typically defined by using hull form series, such as Series 60, Taylor, BSRA and similar. Today these series are no more feasible and typically hull form design is based on reference vessel(s). A series of good recently tested and built ships is, of course, a perfect starting point. It is, however, difficult in today’s evolutionary world to find one single organisation 7KH)XWXUH2I6KLS'HVLJQ 'HVLJQ([SHULHQFH having good references for different types of hull forms, main dimension ratios and other related parameters. It is always worthwhile to check the references against the state of the art on the market of any organisation to be worked with, even model basins, before starting any further cooperation. General tendency has been to increase the earning capability of a vessel in comparison with the price. Length is still considered as one of the main parameters in the price definition, as well as restricted in many cases due to harbour and route limitations. Beam and block coefficient has been increased. Some limits, however, may have been met. Let us look at a few typical examples of different types of vessels recently built. An extreme example is a product/chemical carrier with main dimensions: LPP = 115 m, B = 24 m, T = 12,4 m and main dimension ratios L/B = 4,79, L/T = 9,27 and B/T = 1,94. A pram type stern hull form was applied with a slender centre skeg to accommodate propulsion machinery. Course stability was carefully studied with model testing and special attention had to be paid for the design of the centre skeg, slender enough, and the rudder size, somewhat larger than normal. Figure 1-1 shows the body plan. Figure 1-1 Body plan of a chemical/product carrier with main dimension ratios of L/B = 4,79, L/T = 9,27, B/T = 1,94. The block coefficient (CB) has increased for chemical and product carriers below 40.000 dwt close to 0,80 or even slightly above. Applying pram type hull form has allowed a shift of longitudinal centre of buoyancy (LCB) aftwards enabling smoother forward shoulders and lower waterline entrance angle. Typical figures today vary between -1,8%…+1,0% of LPP aft or forward of LPP/2. The design waterline angle can be reduced at the same time with 1,5…2,5 degrees (half 7KH)XWXUH2I6KLS'HVLJQ 'HVLJQ([SHULHQFH angle).