Structural Strength Assessment Of The 124 Meter Dredger

The rapid development of shipping industry has driven the industry of dredging machinery and equipment over the recent years.The dredger as the main dredging device has a particular hull structure compared with the conventional ship type,such as the fore and aft with need a slot to set up the bridge and vehicle;In addition,the large openings of the main deck and the complex engineering equipment on the hull result in the structural strength and deformation issues.At present,the research on the structural analysis of the dredger has not been carried out extensively,It is necessary to study the structural strength of the ship.Therefore it is vital to utilize the appropriate method to get the deformation and stress results accurately.In this paper,a 124 m dredge ship is used as the main study object.Firstly,the calculation principle of the wave load,method and the process of the whole ship structure analysis are elaborated.Secondly,the SESAM software is used to build the hydrodynamic model and the mass model which used for the accurate prediction of wave loads.Lastly,the cabin structure model is established by the PATRAN software and the appropriate working conditions are selected according to the relevant specifications.The rationality of the ship structure is determined by the lateral strength and the total longitudinal strength.Basing on above work,the analytical method of the strength of the dredger has been studied,discussed and summarized.According to the results,we find that 1)the calculated values of the relevant sea-going vessels are relatively conservative;2)the structure of the ship is designed reasonably;3)the analytical measure range of the model is still insufficient in the analysis of structural strength;4)The bending stress of the plate in the hull structure is negligible;5)the strength disciplinary of the dredger are of great reference value to design the same type of ship.