利用LSCE方法识别桥梁气动导数研究

在节段模型自由振动法识别桥梁气动导数风洞试验中,采用LSCE识别方法,无需迭代和设定初始值而实现整体识别.对具有理论解的理想平板气动导数进行识别仿真研究,结果表明:对不含噪声信号识别结果与理论解完全一致,对含有20%噪声的低信噪比信号识别除了A*4以外也都有较好的一致性,表明LSCE方法具有较高的识别精度和良好的抗噪声性能.风洞试验研究结果进一步证明了该方法具有较好的识别效果.

Identification of aerodynamic derivatives for bridge sections by LSCE method

In the process of aerodynamic derivatives' identification for bridge sections based on free-to-decay vibration wind tunnel test,a LSCE method is introduced,which identifies aerodynamic derivatives integrally without iterations or initial values needed.Through simulation of aerodynamic derivatives' identification for ideal flat model with that method,it's indicated that aerodynamic derivatives identified are completely consistent with theoretical solutions for noise-free signals,and also satisfying for signa...