基于频率摄动理论对结构健康检测BENCHMARK问题的识别  

The identification of benchmark problem based on frequency perturbation theory

作　　者：杜思义[1] 殷学纲[2] 陈淮[1] 

机构地区：[1]郑州大学,郑州450002 [2]重庆大学,重庆400030

出　　处：《应用力学学报》2010年第4期674-679,共6页Chinese Journal of Applied Mechanics

摘　　要：定义了结构有限元模型中的损伤识别参数,将结构振动特征值摄动和结构有限元理论相结合导出结了构损伤定位以及定量的一阶和二阶摄动识别公式,并给出了两种方程在不适定条件下的优化解法。把该方法用到ASCE结构健康监测工作组提出的Benchmark问题中,成功识别了设定的损伤模式,而且其受模型误差和测量噪声的影响较小。研究表明该方法可以用于大型结构的健康监测问题。Damage identification parameters in finite element model(FEM) are defined.The formulae and method for quantifying identification of damage severity and position in structure are presented by perturbation and FEM dynamics of structures theories in the paper.The damage patterns presented by ASCE structural health monitoring task ground are successfully detected by the above method,and the method is less affected by the model error and the measure noise.The method is applicable to the health monitor and damage detection of large structures.

关 键 词：损伤识别 摄动 固有频率 BENCHMARK 

分 类 号：TU311.3[建筑科学—结构工程] O346.5[理学—固体力学]