基于精细积分算法的动荷载识别研究

为深入探讨动荷载识别问题，基于精细积分法的基本原理，针对单自由度和多自由度体系，假定外荷载在离散时间步长的微小时间间隔内按线性规律变化，推导出一种动载荷识别时域方法。通过实例分析了该法对不同类型荷载进行识别的效果。结果表明:该法对于稳态荷载以及随机荷载均是适用的，具有很好的稳定性、一定的抗噪能力、且计算精度较高，计算量较小，便于工程应用。

Study on Dynamic Load Identification Based on Precise Integration Method

In order to further explore the identification of dynamic loads,for single-degree-of-freedom and multi-degree-of-freedom system,assuming that external load changes linearly within small interval of discrete time step based on the basic principle of precise integration method,a time-domain method for dynamic load identification has been educed.Through examples,the effect of this method to identify different loads is separately analyzed.The results show that this method is applicable for stable loads and random roads,with better stability,certain anti-noise property,higher precision and small amount of calculation,which is easy for engineering applications.