摘要
根据土木结构环境振动的特点和ＩＴＤ法及随机减量技术的优点，建议用ＩＴＤ法或随机减量技术结合ＩＴＤ法由结构环境振动响应数据识别其模态参数．并用计算机仿真技术，讨论了使用ＩＴＤ法和随机减量技术时应注意的一些问题，对桥墩和一斜拉桥进行了仿真识别．结果表明，用这种方法由土木结构的环境振动响应识别其模态参数是可行的，并具有测试方便，数据处理简单，精度较高，识别结果较多的优点．
According to the feature of civil structural ambient vibration,and considering the advantage of lTD method and random decrement technique,the lTD method or the lTD method combined with the random decrement technique are suggested to identify model parameters through the response of ambient vibration. By means of computer simulation,some applied problems of the lTD method and the random decrement technique are discussed.Furthermore,the model parameters of a pire and a cable--stayed bridge are identified by computer simulation.It has been proved that using this method to identify the model parameters through ambient vibration is practicable. It has the advantage of being convenient in testing,simple in data processing and highly accurate as well as being able to identify more model paraments.
出处
《兰州铁道学院学报》
1995年第3期1-9,共9页
Journal of Lanzhou Railway University
关键词
桥梁
环境振动
模态识别
时域法
仿真
bridge
ambient vibration
model identify
time-domain analysis
