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本文介绍一种基于欧拉梁振动理论由桥梁响应识别桥上移动时变荷载的方法，用模态叠加法和最小二乘法由桥梁挠度或应变识别梁的模态位移，采用差分方法得到梁的模态速度和模态加速度，由梁的模态座标方程和最小二乘法识别桥上移动荷载，并通过计算机仿真说明测试误差、桥梁跨度及荷载间距对识别结果的影响
In this paper, a method based on the Eulerian beam vibration theory is introduced to identify the moving time-varying loads on the bridge by the response of the bridge. The modal superposition method and the least square method are used to identify the modal displacement of the beam from the bridge deflection or strain. Modal velocity and modal acceleration. The modal coordinate equation of the beam and the least square method are used to identify the moving loads on the bridge. The influence of the test error, bridge span and load spacing on the recognition results is illustrated by computer simulation