结构连续分布的动态随机载荷识别方法研究

复杂结构连续分布的动态随机载荷识别技术是结构动载荷识别技术的难点之一。推导了基于广义正交多项式特征技术动态随机载荷识别模型，馋决了在一定精度范围内通过有限测量部位随机振动响应信息识别无限未知量的结构分布动态随机载荷的关键技术，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，适用于具有沿结构分布的振动随机载荷识别，为分布动态随机载荷识别技术的发展打下一定的基础。

The Identification Method Research of Dynamic Random Load Distributing on Structure

The identification technique of dynamic random load distributing on complex structures in one of key technologies about dynamic load identification. In the paper, the dynamic random load identification model is derived by use of the generalized ortho-polynomial characteristic technique. The key identification technology of random load with continuously distributing characteristic is developed by using the information of the random vibration response of limited measurement positions within the range of certain precision. The correctness, validity and feasibility of this method is proved by use of the dynamics calibration technology and the numerical simulations of finite element model of structure. The method is suitable for identification of dynamic random load distributing on structure. The author's results lay a certain foundation for development of the identification technlolgy of dynamic random load distyibuting on strueture.