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DEVELOPMENT OF AN EXPERIMENTAL TOOL FOR DESIGN OF LARGE SES FAST SHIPS

Objective


The main results of the Project is the availability of SESLAB detailed design drawings. The SESLAB is a SES manned model having size close to the full scale dimensions of existing small/medium SESs to reduce as much as possible the scale effects acting on the performance simulation.
When referred to large size SESs, the available scale ratio is intermediate between towing tank actual practice and unity.
The main SESLAB feature is to perform with only one tool the simulation of a wide range of SES vessels (length range 65-160 m; displacement range 500-5000 t; speed range 40-70 kns), the measurement of the most important parameters and performances related to the design and the operation of an SES vessel (spread and powering, seakeeping, manoeuvrability, structural loads and response, functional performance of main components), the assessment of new and innovative design concepts both for the platform (parametric variation of L/B ratios and of natural heave frequency) and for the main components (alternative seal system design and air supply, alternative main lift locations at various operative parameters, alternative waterjet intake and impellers), the analysis and the presentation of test campaign results.
Nowadays there is a general need to transport passengers, car and cargoes at reasonable costs and high speed through the sea.

The most attractive type of high speed vessels seems to be the Surface Effect Ship (SES). Up to now only small and medium size SES. have been put in service for military and passengers transportation purposes.

The proposed research is oriented at studying a proposer experimental tool to be used at design stage for the production of the necessary date, and experience useful for a reliable design of a large size SES (length over 100 m) capable of speed over 50 Km with passenger, cars and cargo capabilities up to 1000 T pay load. For this reason, the research is devoted to define and design a proper ship prototype, that should be "flexible", that means able to stimulate at sea the behaviour of a wide range of ships size and payload.

The main objectives of the project are:

- Identify the proper size of the manned model.
- Realize the maximum flexibility.
- Simulate the most relevant phenomena and conditions, including those coinvolving the air cushion dynamics and other phenomena for which is not possible an evaluation on scaled model.
- Allow the maximum possible types of measurements to collect significant data for design.
- Allow a large type of experiments for the most relevant components, systems and structures.
- Decide on the basis of the cost/benefit ratio the building of a flexible manned model.

Funding Scheme

CSC - Cost-sharing contracts

Coordinator

Centro per gli Studi di Tecnica Navale SpA (CETENA)
Address
Via Al Molo Giano
16126 Calata Grazie Genova
Italy

Participants (8)

Air Vehicles Ltd
United Kingdom
Address
Three Gates Road
PO31 7UT Cowes
Avon Technical Products Division
United Kingdom
Address

SN12 8AA Melksham
BREMER VULKAN VERBUND AG
Germany
Address
Z Zt Klussmannstraße
2850 Bremerhaven
EN BAZAN DE CNM SA
Spain
Address
Pø De La Castellana 55
28046 Madrid
Entwicklungszentrum fuer Maritime und Industrielle Technik GmbH
Germany
Address
Stresemannstrasse 46
27570 Bremerhaven
Fincantieri - Cantieri Navali Italiani SpA
Italy
Address
Via Cipro 11
16129 Genova
Riva Calzoni SpA
Italy
Address
Via Stendhal 34
20144 Milano
Riva Lips Srl
Italy
Address
Via Savona 52
20144 Milano