基于经验模态分解的桥梁挠度响应识别研究

Identification of Deflection Response of Bridge Based on Empirical Modal Decomposition

桥梁影响线可以反映全桥的力学特征,为后续开展荷载作用下桥梁受力特性研究奠定基础。但在车致激励下实测挠度影响线往往掺杂较多的噪声扰动,为有效剔除桥梁影响线中的动力成分,采用经验模态分解方法,剔除影响线中掺杂的噪声成分,并通过仿真试验佐证了方法的可行性。

The influence line of a bridge can reflect the mechanical characteristics of the whole bridge,which lays the foundation for the subsequent research on the force characteristics of the bridge under load.However,the measured deflection influence line under vehicle excitation is often mixed with more noise disturbances.In order to effectively remove the dynamic components in the bridge influence line,empirical modal decomposition method was adopted to remove the noise components in the influence line,and the feasibility of the method was confirmed by the simulation test.