一种基于均方比值的人致结构振动加速度响应信号筛选方法

A screening method of structural vibration acceleration response signals based on RMS ratio value

提出了一种基于人致楼板振动响应的加速度均方根值参数,该参数是结构振动响应信号均方根值和加权均方根值的比值,该参数能够快速判断采集到的人致楼板构振动信号数据是否异常。通过人致楼板振动响应均方根值的理论推导得到了该参数的具体表达式,同时通过建立施加不同工况的人群荷载有限元楼板模型,和不同工况人群作用下楼板振动现场试验,对该参数的性质进行了论证,该参数受人群荷载的参数影响小,与结构自身的基本性质相关性大,在处理大量数据信号时,可以通过该参数对数据进行快速筛选。

Here,a new parameter based on RMS values of human-induced floor vibration acceleration was proposed to determine whether the collected human-induced floor vibration signal data are abnormal quickly. This parameter was the ratio of RMS and weighted RMS of the collected human-induced floor vibration acceleration response signal. The specific expression of the parameter was derived with the theory of the human-induced floor vibration response. The parameter was verified using a finite element floor model with human-induced loads under different operation conditions and a site test of floor vibration with human-induced loads under different operation conditions. It was shown that human-induced loads' parameter has little effect on this proposed parameter,it is greatly related to basic properties of the floor structure; when dealing with large amounts of data signals,this parameter can be used to screen quickly these data.