If transporting cars or trucks at sea could be done without lashings, it would be possible to transport more vehicles within the same deck area. It would also decrease the cost and time of operation as well as cargo damages due to lashing.
As a first step towards the design of a lashing-free deck, Junbo Jia has – in his doctoral dissertation – conducted simulations of different movements on board a target vessel of a 6 000 – units RO-RO ship.
It is proposed in the current thesis that in some conditions, the cars on decks can be transported without lashing them. It is suggested from the analysis that vehicles may be secured without being lashed in a large area of the ship on some voyage routes in specific weather conditions with a less adverse sea state. Whereas it is still suggested that conventional lashing holes on the deck should be constructed, this is because at severe sea states the cars are still needed to be lashed. Several lashing-free deck designs are proposed by the author together with the industry partners.
It is suggested that experimental testing on board a real ocean-going ship according to the said proposals should be carried out in the future in order to put the concept design into the industrial practice.
The thesis “Dynamics of Vehicle-Deck Interactions” will be defended in public on October 5, 10am in Building Saga, Chalmers Campus Lindholmen, Chalmers University of Technology, Göteborg.