关键词: 导管架平台, 结构健康监测, 有限元模型修正, 数字孪生

Abstract: Abstract: At present, nearly one-third of Chinas offshore jacket platforms had exceeded or were about to reach the design life, and the maintenance or repair of the platform structures were more urgent than ever. The traditional underwater structure damage detection of jackets had fewer measuring points, and was difficult, expensive, and might not predict the states of the platform structures. A jacket platform structure monitoring system was developed in the South China Sea. The system mainly included marine wind and wave environmental monitoring and platform structural vibrations and strain response monitoring. According to the monitoring data, a digital twin of the active jacket platform structures was proposed based on the dual finite element model modification. The safety assessment and life prediction models of the platform structures were modified through the digital twin technology to grasp the structural behaviors of the offshore jacket platform structures during the entire service cycle. Scientific prediction and preventive maintenance were used to extend the life of the platforms.

Key words: jacket platform, structural health monitoring, finite element model modification, digital twin