基于振动检测的海洋平台结构安全快速评估方法

摘要

A fast structural safety assessment method for offshore fixed platform was set forth , which identifies structural mo-dal parameters and calculates the difference of generalized stiffness matrix between the in -service structure and the original struc-ture based on the vibration detection data directly .The earthquake damage assessment research achievements in civil engineering were consulted to create the grading standard of structural safety assessment .The numerical example proved the feasibility of this method.The presented method is able to use the vibration detection to achieve rapid safety inspection for offshore platform struc -tures.%基于振动检测数据识别结构模态参数，计算得到现役平台结构与原始平台结构广义刚度的变化，实现对平台结构快速安全评估，借鉴土木工程地震损伤评估的研究成果，建立安全等级划分的标准，算例表明该方法可行，可实现利用振动检测手段对在役海洋平台结构进行快速安全检杳。