摘要
基于节段模型弯扭耦合自由振动试验,在现有的最小二乘迭代法中引入加权矩阵,给出了桥梁断面颤振导数识别的加权最小二乘迭代法(WLS法)。设计了一个节段模型仿真系统将WLS法与现有方法进行了比较,试验结果验证了WLS具有更好的识别精度和计算效率。最后基于MATLAB语言编制了颤振导数识别程序并应用于风洞试验中,通过不同识别方法的风洞试验结果对比验证了该方法的正确性与可靠性。
Based on two-degree-of-freedom coupled free vibration sectional model wind tunnel tests, the method of weighted least square （WLS method） for identifying flutter derivatives is derived by introducing a weighted matrix. The comparison be-tween WLS method and existing method based on the simulation experiment of the two-degree-of-freedom model is carried out, and the proposed method is proved to have better anti-noise ability and computational efficiency. In addition, the identification program based on MATLAB language is applied to the wind tunnel test, and the reliability and applicability of the proposed method are verified by test examples.
出处
《振动工程学报》
EI
CSCD
北大核心
2017年第6期993-1000,共8页
Journal of Vibration Engineering
基金
国家自然科学基金资助项目(51078038)
