Analysis And Software Development For The Slippage Shipment Of Large Jacket

With the exploration of ocean-petroleum engineering, large platform structures begin to be applied in deepwater areas. It makes platform structures becoming more and more huge. Some platforms appeared lately are more than 10,000 tons weight. As its vital step-slippage shipment operation is particularly necessary. Large-scale marine structure shipment engineering has replaced traditional floating crane operation and becomes a major technology in platform and platform jacket blocks construction, because using drag system to pull along drag chute can greatly reduce construction cost. In this process, we need to prevent the following problems: structure's transient failure, insufficiency of barge strength, and imbalance of barge ballast tanks caused by tides.In this thesis, attention is concentrated on characteristics of large-scale structure slippage shipment, and its influence factors including barge load, changes of floating state and stability, tides, etc. Combined with an actual construction process, a software on load adjustment of slippage shipment also has been developed by Visual C++. This study mainly includes:1. Research on the slippage shipment processes, environmental factors, and the regularity for change of floating state and stability.2. Strength analysis for structure's transient failure caused by environmental factors.3. Barge strength analysis for slipping different types of structures.4. Develop a software using Visual C++on calculation of slip transfer operations, which can help greatly improve construction efficiency reduce the construction period.