摘要
对三种不同的传感器优化布点算法在系杆拱桥中的应用进行对比分析,研究不同算法的侧重点及优化效果。首先对三种优化方法的原理进行分析,然后以一大跨系杆拱桥为背景,研究桥面在三种方法下加速度传感器测点布设的差异,并采用四种评估准则对传感器布置的优化效果进行对比分析,最后采用无量纲化技术将四种评估准则转化为综合评价体系。分析结果表明:不同的优化算法对优化效果的影响较大,在进行传感器的优化布设时,必须对不同的优化算法进行对比,以选取最优算法。
Contrast analysis was carried out on three optimal sensor placement approaches,i.e.,the effective in- dependence,the modal assurance criterion and the variance matrix approcahes.The differences among them and their op- timization effects were discussed.With the background of a recently built Long-span tie-arched bridge,the sensor place- ment schedules with vrious amount of sensors were provided by successive use of the three approaches and their effects were evaluated according to four estimating criteria.On this basis and by virtue of non-dimensionalizing technique,a gen- eral assessment system was built.The results show that the differences among the three placement approaches do exist and appropriate selection shoule be made to get the best results of optimization.
出处
《振动与冲击》
EI
CSCD
北大核心
2008年第11期190-193,共4页
Journal of Vibration and Shock
基金
国家863计划项目(2006AA04Z433)
重庆市科技攻关重大专项(7289)
关键词
测点优化
改进的有效独立法
模态置信度法
协方差矩阵法
optimal sensor placement
effective independence method
modal assurance criterion
variance matrix method
