中文摘要：

在正交域中运用有限元分析技术，将任意复杂结构上移动载荷的识别转化为正交多项式拟合系数的识别，由响应和激励之间的线性关系识别出拟合系数。该方法适用任意边界条件的复杂模型，且能识别速度变化的移动载荷。文中讨论了连续载荷在有限元节点上的等效问题，通过仿真和实验验证该方法简单、有效、抗噪性较好，适用于复杂的工程结构。

英文摘要：

A new moving load identification method is presented based on function fitting technology and finite element method. According to the linear relation of the load and the structure response ,the fitting coefficients can be identified, then by these coefficients, the moving load can also be identified. The method can be applied to all complex structure with various boundary conditions. And it can also identify the varying-speed moving load. How to equal discrete node load to continious moving load is discussed. Numerical simulations and experimental results demonstrate the briefness ,effectiveness and anti-interfered capacity of the method. Thus the method can identify the moving load for complex engi- neering structure.