ABSTRACT
Nowadays more and more large vessels are built to meet the rapid requirement of the marine transport trades. However, the large vessels always receive many excited forces which are caused by sea waves or other factors during its operations. Ship hull deformation caused by the sea wave will have an effect on the vessel’s propulsion system through the support bearings (Yan & Li, 2013). The propulsion system which is suffered from the ship hull deformation excitations threats the operation quality and the durability of the machines in the vessels. In 2005, the Swedish Club published a 6-year study of the accident statistics report from 1998 to 2004 (The Swedish Club Highlights, 2005). Following study of the accident statistics report spanning 7-year (2005-2011) was published in 2012 (The Swedish Club Highlights, 2012). A comparison between the two statistical results is shown in Figure 1. The cost of the two periods was shown in Table 1 and Table 2 respectively.
