PROJECT:
Analysis on Midwater Arch (MWA) Gravity Base
A SQUARED
make it happen.
Our client was selected to design a repair structure offering an alternative load path to engage the gravity base as a result of fatigue cracks being identified in the padeyes that connected the MWA tethers to the primary clump weights.
A SQUARED served as an integral part of the design team performing strength and fatigue assessment for tether base structures, feeding back our findings into the design process for the clamp connected spreader beam repair solution.
The Challenge
The midwater arches are critical components in the subsea architecture that is used in the transfer of hydrocarbons from the wellhead to the floating production asset. It was critical that the engineering work scopes kept pace with a fast track program that had to see repairs made in the late summer window before winter storms.
A SQUARED served as an integral part of the design team performing strength and fatigue assessment for tether base structures, feeding back our findings into the design process for the clamp connected spreader beam repair solution.
The Challenge
The midwater arches are critical components in the subsea architecture that is used in the transfer of hydrocarbons from the wellhead to the floating production asset. It was critical that the engineering work scopes kept pace with a fast track program that had to see repairs made in the late summer window before winter storms.
The Solution
The A Squared Team used their significant expertise in analysing subsea structures.
A critical part of this process was developing boundary conditions representative of the support offered by the sea bed for the gravity base structure. Reliable results were dependent on this important step.
Member utilisations were calculated comparing member forces due to survival tether loads to section capacities calculated using AISC 360-10.
Load range and cycle frequency data for the tethers was used to complete a damage accumulation sum and calculate the fatigue life for critical joints.
The A Squared Team used their significant expertise in analysing subsea structures.
A critical part of this process was developing boundary conditions representative of the support offered by the sea bed for the gravity base structure. Reliable results were dependent on this important step.
Member utilisations were calculated comparing member forces due to survival tether loads to section capacities calculated using AISC 360-10.
Load range and cycle frequency data for the tethers was used to complete a damage accumulation sum and calculate the fatigue life for critical joints.
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Benefit for the Customer For strategically important items of subsea infrastructure, the consequences of failure are great. Our experienced engineers left no stone unturned giving our client and the field operator confidence in the findings of our analysis. |
