Structural Finite Element Simulation and Evaluation Method for Ship Collision Damage and Residual Strength of the Jacket

Abstract

[Introduction] The vessel collision of jacket foundation in an offshore wind farm in the South China Sea happens frequently. Under this circumstance, the accurate assessment of the residual strength after structural damage has become an important technology of the safety of wind farm operation and maintenance. [Method] Based on the actual jacket structure of a wind farm in the South China Sea and considering the actual ship operation situation in the sea area, this paper used the finite element software ABAQUS to simulate the ship collision damage process of jacket foundation under different combinations of ship mass, initial velocity and collision angle. [Result] By using the quasi static method, the time interval of the collision forces and the plastic strain contours of the key nodes under different working conditions are concluded. Besides, the relationship between the maximum impact forces and impact factors and typical characteristics of the damage are concluded. [Conclusion] Based on the analysis, the typical change laws of the residual strength after the ship collision of the jacket are concluded to provide technological support for rapid assessment of the collision damage of related structures in the actual engineering process.

Keywords

• jacket
• collision forces
• ultimate strength
• residual strength