Research of Load and Structural Direct Calculation on Flat-Type River-Sea-Going Ship

River-sea-going ship is popular because it can directly transport from river to sea, reducing the cargo transfer process, eliminating the loss of goods and shortening the voyage time so that the shipping cost can be decreased and transport efficiency can be improved. To increase its capacity and to obtain better economy, the present river-sea-going ship is usually designed with large ratio of breadth to depth which exceeds the definition of existing rules. The characteristic of wave load is also quite different from that on sea-going ship or inland ship. In the present research, the exceeding probability level of wave load is studied firstly according to the actual status of navigation route. Long-term prediction on wave load is performed based on selected wave spectrum, wave scatter diagram and exceeding probability level. The equivalent design wave height can be obtained, and then the wave load can be calculated. Furthermore, the loads are transferred to entire structural model and the finite element analysis is performed. The structural yield strength and buckling strength are evaluated.