【摘要】 工程爆破以及过桥车辆都会引起桥梁的振动效应。根据现场实测数据,基于MATLAB软件信号分析处理平台,利用RSPWVD与小波分析相结合的方法对2种振动信号的时频特性进行对比分析,结果表明:车辆振动较爆破振动主频低且持续时间长,能量主要集中在10 Hz以内的低频部分且持续时间长并随着能量的降低其能量持续时间趋于稳定;爆破振动信号的能量主要集中在10~50 Hz之间,能量持续时间随频率的增大而有所延长。分析结果可为2种振动信号作用下桥梁动态响应的研究提供基础,也可为公路桥梁的振动控制提供依据,或可为类似的工程提供借鉴。更多还原

【Abstract】 The engineering blasting as well as passing vihicle will cause the vibration of bridge.According to the monitored data and MATLAB software signal processing platform,the time-frequency of two vibration signals was analyzed comparatively using the combination of methods of RSPWVD and wavelet analysis.The results show that the dominant frequency of vehicle vibration is lower than that of blasting vibration but the duration is longer;the signal energy of vehicle vibration mainly concentrates within the low frequency 10 Hz and long duration,and with the decrease of energy,the duration time tendes to stability;and the signal energy of blasting vibration mainly focuses on between 10 and 50 Hz and the duration of energy amplifys with the increase of frequency.The results provide foundation to the study of bridge dynamic response under the action of the two vibration signals.It also can provide bases to the vibration control of highway bridge or the similar objections.更多还原