在役导管架平台动态可靠性研究

针对在役海洋平台结构进行可靠性分析,动态可靠性评估是最为有效的方法。包括结构的动力可靠性和时变可靠性评估。针对海洋导管架平台的复杂环境,首先考虑结构腐蚀和损伤等因素,计及载荷效应与抗力效应的影响,并结合时间离散法,计算平台的时变可靠度。通过计算结构的传递函数和响应谱,并依据首次超越理论进行动力可靠度的计算。文章研究的方法能够为海洋平台服役期间的安全状况评估提供理论依据并为平台结构的维修提供指导。

Reserch of in-service jacket platform dynamic reliability

Dynamic reliability assessment is the most effective method for in-service engineering structures. It includes the assessment of dynamic reliability and time-varying reliability of structure. In this paper, by taking the effects of corrosion and damage into consideration, platform load effect and resistance effect was obtained. Finally, combined with the time-discrete method the time-varying reliability of the platform was determined. By caculating the transfer function and response spectrum, dynamic reliability can be caculated based on the First-Passage theory. The methods in this paper can provide a theoretical basis accurately to reflect the state of the offshore platform safety during their service and guidance for the maintenance of the platform structure.