基于结构部分结点振动响应信息的海洋平台损伤诊断研究  

DAMAGE DIAGNOSIS OF OFFSHORE STRUCTURES BASED ON RESPONSES OF A PART OF NODES

作　　者：黄维平[1] 王晓燕[1] 唐世振[1] 

机构地区：[1]中国海洋大学海岸与海洋工程研究所,青岛266100

出　　处：《工程力学》2008年第5期218-221,226,共5页Engineering Mechanics

基　　金：教育部高等学校博士点专项基金项目(20050423002);国家自然科学基金重点项目(50639030)

摘　　要：利用结构的前三阶频率和部分结点的响应信息构建适应度函数和目标函数,采用改进的CHC遗传算法对结构进行损伤诊断,在相同的收敛精度条件下,大大减少了遗传代数和结构分析时间,因而提高了计算速度。数值算例表明:在不同的传感器配置条件下,对固定式导管架平台的损伤诊断均具有较高的损伤定位和损伤程度估计精度。The fitness function and objective function are composed of the first 3 order frequencies and incomplete structural responses and the damage of structures are diagnosed with improved CHC algorithm. Comparing with SGA, the genetic generation and the time consumed by structural response calculation are reduced largely with the same level of the errors. The case studies show that the satisfied results of the damage location and assessment of a jacket offshore platform can be expected based on different sensor placements.

关 键 词：结构损伤诊断 遗传算法 改进CHC算法 海洋平台 传感器配置 

分 类 号：TU312[建筑科学—结构工程]