交通环境振动测试中的本底振动分析  

Background vibration analysis for traffic environmental vibration testing

作　　者：张向东[1] 闫维明[1] 任珉[2] 刘猛[3] 

机构地区：[1]北京工业大学工程抗震与结构诊治北京市重点实验室,北京100022 [2]广州大学工程抗震研究中心,广州510405 [3]辽宁工业大学土木建筑系,锦州121000

出　　处：《振动与冲击》2009年第4期177-179,197,共4页Journal of Vibration and Shock

基　　金：国家自然科学基金资助项目(50478042,50578046);北京市教委科技与研究生教育建设项目(4700001401509)

摘　　要：交通系统的运营诱发的环境振动已成为人们普遍关注的问题。现场测试是研究环境振动问题主要途径之一,而大量本底振动的影响使测试数据不能真实反应所测试振源及传播的特点。为保证测试数据准确性,从加速度时程和加速度振级两个方面提出了消除本底振动影响的两种方法,即幅值修正法和加速度振级修正法;通过现场测试数据进行了对比分析,结果表明两方法均可达到预期效果;最后在此基础上探讨了是否需要消除本底振动的基本判定原则。Environment effect due to traffic transportation is paid more and more attention nowadays. A site experiment is one primary approach to this problem, but because of mass background vibration, the testing data can not represent the characteristic of vibration sources and promulgation. In order to obtain ideal data, two methods to remove background vibration were presented here, one was Fourier amplitude revised method, the other was acceleration vibration level revised method. The two methods were tested, the result showed that the two methods were effective. Basic principles to banish background vibration were discussed in the end.

关 键 词：本底振动 环境振动 测试 

分 类 号：TB53[理学—物理]