深水浮体平台焊接结构疲劳性能测试方法

Research on fatigue performance test method of welding structure of floating platform in deep water

为了解决现有规范对深水浮体平台复杂焊接结构疲劳设计的适用性难题,攻克了多种复杂载荷下多油缸协同控制技术瓶颈,研制了国际首台套双轴拉压+双轴弯曲复合加载的结构级疲劳测试装置与拉压+弯曲复合加载的全板厚焊接节点疲劳测试装置,并建立了空气、海水自由腐蚀、阴极保护腐蚀等多种环境下标准试样的材料级疲劳性能测试方法,构建了多尺度、多环境、多荷载的“材料级-节点级-结构级”焊接结构疲劳测试试验平台,可为中国发展超深水浮体平台在南海复杂恶劣海洋环境下的疲劳设计验证提供有力支撑.

In order to solve the applicability of the existing specifications to the fatigue design of complex welded structures of deep-water floating platforms, the bottleneck of multi cylinder cooperative control technology under various complex loads has been overcome. The first international structure level fatigue test device with biaxial tension compression + biaxial bending composite loading and the full-scale fatigue test device for welded joints with tension compression + bending composite loading have been developed. A test method for fatigue properties of standard samples in air, seawater free corrosion, cathodic protection corrosion and other environments was established. A multi-scale, multi-environment and multi-load fatigue test platform of “material level-node level-structure level” welding structure was constructed. It can provide strong support for the fatigue design verification of my country’s development of ultra-deep water floating platform in the complex and harsh marine environment of the South China Sea.