基于锤击测试的地铁环境振动预测方法的改进  

Modification on Metro-Induced Environmental Vibration Prediction Based on Hammer Test Method

作　　者：袁扬[1] 刘维宁[1] 王文斌[2] 

机构地区：[1]北京交通大学土木建筑工程学院,北京100044 [2]中国铁道科学研究院工程咨询有限公司,北京100081

出　　处：《天津大学学报（自然科学与工程技术版）》2013年第5期408-414,共7页Journal of Tianjin University：Science and Technology

基　　金：国家自然科学基金资助项目(51008017;51278043);北京交通大学优秀博士生创新基金资助项目(2011YJS261)

摘　　要：地铁运营引起的环境振动问题越来越受到人们的关注,如何在频域内准确预测地铁交通引起的环境振动是一个亟待解决的难题.通过理论推导和数值分析,对基于锤击测试的地铁振动环境响应传递率函数预测方法中理论假定和预测结果的准确性进行了研究.结果表明,可以应用多点锤击激起的振动传播体系内传递率函数替代地铁运行引起的体系内传递率函数作为预测方法理论假定的改进;应用改进后的预测方法得到的地表振动响应预测结果接近于应用数值模拟得到的地表振动响应计算结果;基于锤击测试的地铁振动环境响应传递率函数预测方法可以实现时域和频域内准确定量预测地铁交通引起的环境振动响应.Metro-induced environmental vibration has attracted more and more attention. How to precisely predict metro-induced environmental vibration in the frequency domain is a difficult problem to be solved. By means of theo- retical derivation and numerical analysis, the accuracy of the theoretical assumption and the prediction result in the metro-induced environmental vibration prediction based on the transfer rate function in hammer test were studied. The results demonstrate that the means of replacing the transfer rate function in the vibration propagation system induced by metro train with the transfer rate function in the system induced by multi-point hammer is applicable as the modifi- cation of the theoretical assumption in the prediction method; the metro-induced ground vibration response prediction result by the modified prediction method is close to the calculation result by the numerical simulation method; the prediction method which is based on the transfer rate function in hammer test can be used to precisely and quantita- tively predict metro-induced environmental vibration in both time and frequency domains.

关 键 词：地铁 环境振动 预测方法 传递率函数 多点锤击 

分 类 号：TB532[理学—物理] U211.3[理学—声学]