Naval Civil Engineering Laboratory

The project was a Joint Industry Project (JIP) to develop a capacity analysis program (CAP) that can be used to determine the ultimate load capacity of an offshore structure or to verify new designs. The CAP system will aid in the AIM (assess, inspect and maintain) evaluation of old or damaged platforms, and provide an integrated system for analysis and report presentation. The major feature of the program is its ability to conduct push-over analysis that is required to estimate the residual capacity of existing damaged structures.

The objective was to develop improved damping parameters and methods of representing the effects of damping for the analysis and verification of deep water platforms. The MMS was one of six other participants in this Joint Industry Project (JIP) to improve present practice through use of an alternative to the Morrison equation, called the Inertial Pressure Method (IPM).

This was a joint project with the Naval Civil Engineering Laboratory (NCEL), and an adjunct to Project No. 58. The objective was to investigate developing conditional ocean wave simulation models which include extreme events. Methods for estimating a directional wave spectrum from various ocean sensors were developed and are being used by design engineers. A major problem exists regarding using directional spectrum information in extreme event design.

This was a Joint Industry Project (JIP) that was sponsored by 18 oil companies with MMS. The project addressed the environmental criteria required to study alternative drilling, production, and transportation systems appropriate for permanent development of three Bering Sea Basins: St. George, North Aleutian, and Navarin. The project will provide an identification of major engineering problems, constraints, and information needed to allow development of three stated basins. Project No.

This is a Joint Industry Project (JIP) with the Naval Civil Engineering Laboratory. The purpose of this project is to isolate some of the uncertainties in the force coefficients, D and C used in the Morrison (MOJS) equation and to extend the data from an oscillating water tunnel to a harmonic free-surface wave. The logical first extension would be a large unidirectional wave in a wave flume. The test cylinder used will be capable of measuring both local pressure forces and total forces and moments on the cylinder.

This is an adjunct to Project No. 2, Dynamic Response of Offshore Structures. Strumming experiments were conducted on long pipes in a tidal estuary where currents range to 1.5 knots. These experiments will simulate the strumming characteristics of production risers which may be used in deepwater operations. Future plans include possible testing of riser behavior in deep water where they can be vertically oriented.