复杂分布动载荷识别技术研究

复杂结构的分布动载荷识别技术是动载荷识别技术的难点之一。本文推导了基于广义正交多项式特征技术动载荷识别模型，解决了在一定精度范围内通过有限测量点的振动信息识别具有无限未知量的分布动载荷关键技术，通过动态标定技术的研究和复杂结构有限元模型数值仿真计算，验证了方法的正确性、有效性和工程可用性，适用于具有确定性分布的稳态振动载荷识别．为分布动载荷识别技术的发展打下一定的基础。

Research of identification technology of dynamic load distributed on the structure

The identification of dynamic load continuously distributed on complicated structure is one of key technologies. In the paper, the identification model of dynamic load has been derived from the generalized ortho-polynomial characteristic parameter. The key technology of load identification with continuous distribution characteristic has been solved by the vibration response of limited measurement points within the range of certain precision. The correctness, validity and engineering usability for this method are verified via the dynamics calibration technology and the numerical simulation of the finite element model for complicated structures, and this method is suitable for the identification of the deteminary distributed loads of stable state vibration. All above, this method lays a certain foundation for development of dynamic load identification.