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首页> 外文会议>Structural Materials Technology III: An NDT Conference >Progressive damage detection using noncontact measurements
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Progressive damage detection using noncontact measurements

机译：使用非接触式测量进行渐进式损坏检测

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Abstract: This paper presents work in progress toward the development of a bridge condition assessment system. The system combines remote laser vibration sensing technology and a strain-energy- based damage detection algorithm. The results from vibration tests conducted on laboratory specimens with different degrees of damage are presented. The vibration signatures are acquired using Scanning Laser Vibrometers (SLV). The extracted mode shapes from these tests are then used in the damage detection algorithm. The preliminary results indicate that the strain energy differences are highly sensitive to damage, and can be used to locate and distinguish progressive damages. The combination of SLV technology and the damage detection algorithm makes remote sensing attractive for the monitoring and inspection of structures. Finite element simulation of a progressive damage at a single location is also presented to illustrate the sensitivity of the algorithm to increasing damages. !10
机译：摘要：本文介绍了桥梁状况评估系统开发的工作。该系统结合了远程激光振动传感技术和基于应变能的损伤检测算法。给出了对具有不同程度损坏的实验室样本进行的振动测试的结果。使用扫描激光振动计（SLV）获取振动信号。然后将从这些测试中提取的模式形状用于损坏检测算法。初步结果表明，应变能差对损伤高度敏感，可用于定位和区分渐进损伤。 SLV技术和损伤检测算法的结合使遥感技术对结构的监视和检查具有吸引力。还介绍了单个位置处渐进式损坏的有限元模拟，以说明算法对增加的损坏的敏感性。 ！10

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