The overall strength assessment of a semi-submersible platform structure was carried out based on direct calculation.

On the basis of 3-D FEM calculation on global longitudinal strength,recommendation of new hull girder strength criteria was made for a ship with length of about 200m.

In this paper,3-D FEM for the global ship,by adding loads and inertia adjustment, is used to calculate its longitudinal strengh,longitudinal bending distortion and stress distribution, and the efficiency of the superstructure to stand against longitudinal strength,which present a foundation for the check of shi.

Study on longitudinal strength calculation method of hull standing above an explosion bubble;

Resaerch for damage mode that reduce longitudinal strength of service bulk carriers;

The checking method of longitudinal strength for ships using deflections of ships;

In the paper, the background to research a standard-type of truck roll-on/roll-off ship navigating in upper Yangtze river and San Gorge Reservoir and the determination of both loads for calculating general longitudinal strength and the ratios of dimensions L/D and B/D are briefly presented, the effect of double bottom and general arrangement on the general longitudinal strength is analyzed.

The rupture in the middle of bulk cargo is due to the corrosion and fatigue of components in long term usage, which leads the sec tion modulus to reduce and the general longitudinal strength to weaken.

Analyze and conclusion is made to the particular of this type of vessel when investigating the overall longitudinal strength of different type of caisson less than the length 190m.