利用桥梁响应二维相空间损伤识别的数值研究Numerical Study on Damage Detection Based on Phase Trajectory of Dynamic Responses of Bridge Structure
张雷,张伟伟
摘要(Abstract)：
基于移动载荷下桥梁结构单点位移测试,利用差分求解速度响应,重构了"位移-速度"相空间用以结构的损伤识别。数值算例表明,直接利用位移响应或速度响应难以发现结构损伤,但通过构造"速度-位移"相轨迹,以完好结构的相轨迹为参考,计算损伤工况下的轨迹与完好工况轨迹对应点的分离距离,定义为损伤指标,利用该指标可有效地同时识别结构的损伤位置和损伤程度。
关键词(KeyWords)： 桥梁;移动载荷;差分法;相空间;损伤识别
基金项目(Foundation): 国家自然科学基金(11102125;11372207);; 山西省自然科学基金(2013011005-3)
作者(Author): 张雷,张伟伟
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