This paper proposes a novel method for damage detection on a simply supported beam subjected to a moving mass using multiple vibration data measured from a vehicle-bridge interaction (VBI) model. It is shown first that the integral of the difference between the deflection time history of the healthy and damaged beam reaches a local maximum at the location of the crack. As such, the integral of the difference between the vibration time history of the healthy and damaged beam at some dense points on the beam is required. However, practically the number of measured points is limited. Therefore, the data from VBI measured at a limited set of points have been interpolated at each time instant to estimate the deflection of other locations on the beam. It has been demonstrated through several simulations that the proposed method can detect both the location and severity of damage on the beam while considering the interaction between the moving mass and the bridge, as well as the effect of road roughness. It is also shown that the proposed method is fairly robust to noise in both damage localisation and quantification.

本文提出了一种新方法，该方法使用从车桥相互作用（VBI）模型测得的多个振动数据，对承受移动质量的简单支撑梁进行损伤检测。首先显示出，健康光束和受损光束的挠曲时间历程之间的差异的积分在裂纹的位置达到局部最大值。因此，需要对健康光束和受损光束在梁上某些密集点的振动时间历史之间的差异进行积分。但是，实际上测量点的数量是有限的。因此，已在每个时间点对来自VBI的，在一组有限的点处测量的数据进行插值，以估计光束上其他位置的偏转。通过多次仿真表明，该方法可以同时考虑移动质量和桥梁之间​​的相互作用以及道路不平整的影响，同时检测梁损伤的位置和严重程度。还表明，所提出的方法在损伤定位和量化方面对噪声都相当鲁棒。