【摘要】 在sap2000中建立模型,采用白噪声为激励信号,在主材上布置若干监测点,进行信号接收。对输电塔在相同位置下发生损伤前后的响应信号应用经验模态分解法(EMD)分解,得到响应信号的各阶本征模态函数,对结构响应信号的各阶固有模态函数用波形因数进行量化。通过对结构损伤前后响应信号本征模态函数的波形因数的对比,可直观地对结构发生损伤进行判断。结果表明,应用该方法可以较好地进行输电塔的损伤识别。更多还原

【Abstract】 The models were established in the sap2000,and the white noise was taken as the stimulus signal,and numbers of monitoring points were arranged on the primary steels to receive the signal.The empirical mode decomposition(EMD) was used to decompose the response signals of the same position on the transmission tower before and after the damage occurring to obtain each order intrinsic mode function of the response signals.The waveform factor was used to quantify each order intrinsic mode function of the structural response signals.The waveform factors of the intrinsic mode functions of the response signals before and after the structural damage were contracted which could intuitively judge the damage on the structure.The results showed that applying this method can be better to carry out the damage identification of the transmission tower.更多还原