摘要
结构损伤诊断是结构健康监测的核心内容之一。在部分前人工作的基础上 ,针对土木工程结构损伤识别的要求 (单元级诊断 )及实际工程中存在的测试噪声干扰问题 ,结合统计方法发展了一套由损伤识别、损伤定位的单元筛选和搜索、单元损伤反演组成的三阶段结构损伤诊断流程。利用钢筋混凝土三跨连续梁的有限元模型 ,在存在较大测试误差 (模态随机噪声 )的条件下 ,对单 /多损伤工况进行了险证诊断 ,结果表明该流程强健有效 ,具有良好工程应用前景。
Structural damage diagnosis is one of core contents of the structure health monitoring. A three steps structural damage diagnosis procedure, including damage detection, damage element selecting and searching and damage inversion at element level, is developed. The procedure is combined with statistical techniques, as there are measure noises in practice. The procedure is testified by diagnosis in the condition of relatively high test errors (modal random noise)on a reinforced concrete continuous beam with 3 spans. The result shows that the procedure is effective and robust, suitable for practical application.
出处
《振动与冲击》
EI
CSCD
北大核心
2004年第4期119-122,共4页
Journal of Vibration and Shock
基金
广东省自然科学基金资助项目 (0 0 0 387)
关键词
结构损伤诊断
损伤识别
钢筋混凝土
土木工程结构
单元
损伤定位
连续梁
人工
三步法
三阶段
Computer aided diagnosis
Condition monitoring
Finite element method
Identification (control systems)
Random errors
Statistical methods
Vibrations (mechanical)
