文档介绍：第 29 卷第 6 期辽宁工程技术大学学报(自然科学版) 2010年 12 月
Vo l . 2 9 Journal of Liaoning Technical University(Natural Science) Dec . 2010
文章编号:1008-0562(2010)06-1062-04
海洋平台立管的传感器优化布置
孙小猛,冯新,周晶
(大连理工大学海岸与近海工程国家重点实验室,辽宁大连 116023)
摘要:为了满足海洋平台结构健康监测和损伤识别的要求,提出了一种以协调模态可观测性与损伤可识别性为
目标的传感器优化布置方法。首先根据结构运动方程,利用损伤导致结构响应的变化,推导了结构响应与模态、
损伤灵敏度的近似解析解。其次,建立包含模态信息和损伤灵敏度信息的传感器优化数学模型。最后利用奇异值
分解方法,发展了一种以信息矩阵最大和条件数最小为目标的迭代算法。海洋平台立管的数值算例表明:该方法
能够为海洋平台立管的健康监测提供可行的布点方案。
关键词:传感器优化布置;海洋平台;立管;健康监测
中图分类号:P 315;P 916 文献标识码:A
Optimum sensor placement for riser at offshore platform
SUN Xiaomeng,FENG Xin,ZHOU Jing
(State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116023, China)
Abstract:To meet the requirement of structural health monitoring and damage detection on riser at offshore
platform, a method for optimizing sensor locations based on the harmony between damage identifiability and
modal observability is presented in this paper. Firstly, accounting for the structural response changes caused by
structural damage, the relationship between the structural response with structural modal and damage sensitivity is
deduced from the structural motion equation by a quasi-analytical mode. Secondly, a mathematical model is set up
including the information of mode independence and damage sensitivity. Finally, Using the technique of s