作　　者： ; ; ;

机构地区： 湖南大学机械与运载工程学院

出　　处： 《振动．测试与诊断》 2007年第1期29-31,共3页

摘　　要： 建立损伤混凝土长梁的一维波动方程及其反演模型,模拟混凝土结构在瞬态波场中的无损检测手段和方法。用弹性模量描述的损伤度作为反演参数,在优化思想下采用共轭梯度法对问题进行非线性反演,数值模拟反演了线性和二次曲线变化的损伤分布情况,得到了与真实值较为吻合的反演结果。为混凝土结构局部损伤的逐段反演识别方法提供了理论依据。 The equation of one-dimensional wave motion and the model of inverse problem for damaged long concrete beam are established in this paper.Non-destructive inspection in transient wave field for concrete structure is simulated.The damage degree described by elastic module is considered as the parameter for the inversion. Based on the conjugate gradient of optimization known as one of non-linear inversion methods,the numbering inversions of linearly and quadratically varying damage model are simulated.The inverse results which considerably accord with true value are obtained.The research could provides a warranty for local damage inversion in segments for concrete structure.

关 键 词： 损伤 瞬态波场 共轭梯度法 逐段反演

领　　域： [理学] [理学]