导管架船撞损伤与剩余强度的结构有限元模拟与评估方法

  目的  海上风电基础结构船撞事故频发，准确评估结构损伤后结构剩余强度成为风电场运维安全的重要技术。  方法  针对广东海域实建导管架和船舶运行情况，采用有限元方法模拟船舶质量、初速度、碰撞角度等不同组合情况下导管架基础船撞过程。  结果  通过计算法，得到不同工况下碰撞力时程和关键节点塑性应变，获得了最大碰撞力与各撞击因素关联关系和典型节点损伤特征。  结论  根据分析结果，得到典型导管架局部结构船撞后剩余强度变化规律，为实际工程中快速评估相关结构的船撞损伤提供技术支撑。

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

  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.