According to the computation and check methods of stability longitudinal strength and trim during the process of cargo stowage, design programme on the basis of VB, fulfills the automatic computation in the process of stowage, demonstrates computational results, corrects the stowage conditions and assesses the computational results.

It s functions include the calculation and checking of ship stability and longitudinal strength and bulk grain stability,the calculation of ship factual displacement and loading cargo by the measual draft in fore,aft and midship,the auto calculation of light ship weight distribution by the shear force curve in loading manual and print.

Because of the special dimension and working condition of floating dock,the general strength, such as longitudinal strength and transverse strength,was performed strictly to the structure.

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.