【摘要】 针对汶川Ms8.0地震中3个典型的加速度基线漂移特性,分别采用基线初始化法、Iwan法及低频滤波法进行了基线校正。通过校正,基本消除了加速度记录中的低频噪音干扰,使基线大致回到了零线。通过实例分析了3种校正方法存在的问题。更多还原

【Abstract】 The sources of some primary low frequency noise effecting on strong motion acceleration are analyzed.To remove the noise,three schemes of baseline correction are introduced,and the effect of the schemes on the velocity and displacement time series integrated the processed acceleration is pointed out.Apply the schemes,three typical accelerations of Wenchuan Ms8.0 earthquake are corrected,and some questions are also put forward for the consideration of baseline correction.更多还原