基于Novozhilov-柔度理论的连续弯箱梁桥位移参数Kalman滤波识别  

Kalman Filtering Identification for Displacement Parameters of Continuous Curved Box Girder Bridge Based on Novozhilov-flexibility Theory

作　　者：叶见曙[1] 张剑[1] 赵新铭[2] 

机构地区：[1]东南大学交通学院,江苏南京210096 [2]南京航空航天大学土木工程研究所,江苏南京210016

出　　处：《中国公路学报》2007年第5期65-70,共6页China Journal of Highway and Transport

基　　金：国家西部交通建设科技项目(200331822315);江苏省交通科学研究计划项目(04Y051)

摘　　要：为了有效评估和预测弯箱梁桥位移场、应力场,进行了连续弯箱梁桥位移参数的识别,推导了连续弯箱梁桥位移参数的Kalman滤波方程,同时基于Novozhilov-柔度理论,给出了弯箱梁桥位移参数Kalman滤波识别的具体步骤。研究结果表明:连续弯箱梁桥位移参数的Kalman滤波识别对位移参数滤波初始值的选取有较强的依赖性,位移参数滤波初始值选取恰当时,位移参数的Kalman滤波识别过程稳定收敛,且收敛于参数真值;滤波初始值选取不合理时,滤波过程易发散。Correct identification of displacement parameters of continuous curved box girder bri which helps to evaluate the displacement field and stress field effectively and structure predict was analyzed. Kalman filtering equations of displacement parameters of continuous curved 1 girder bridge were deduced. Combined with Novozhilov-flexibility theory of continuous cur box girder bridge, the steps of Kalman filtering identification of displacement parameters continuous curved box girder bridge were given. It is demonstrated that Kalman filter identification of displacement parameters of continuous curved box girder bridge has a str~ dependence on the selection of filtering initial values of displacement parameters. When filter initial values are proper, the filtering process is steady and convergent to parameters＇ true valu when the values are improper, it is apt to be divergent.

关 键 词：桥梁工程 连续弯箱梁桥 Novozhilov-柔度理论 位移参数 Kalman滤波识别 

分 类 号：U443.3[建筑科学—桥梁与隧道工程]