动态载荷激励位置识别技术研究

摘要

以简支梁为研究对象,提出了一种动态载荷激励位置识别的“最小判定系数法”.预估载荷虚拟激励位置,择优选取两组加速度响应并在频域内识别虚拟激励位置处的两组当量动载荷,令其差值为最优化目标变量,则最小目标变量对应的一组虚拟激励位置即为载荷真实激励位置.仿真和实验结果表明该方法正确、可行.%Using a simply supported beam as a study objective, a dynamic load location identification method called the minimum determination coefficient method was proposed. The virtual location of the load was estimated, two equivalent dynamic loads at the virtual location were identified based on two groups of seclected acceleration responses in frequency domain. The difference of the two was taken as an optimal target variable, the virtual position corresponding to the minimum target variable was the real loading position. Simulation and test results showed that the proposed method is correct and feasible.