多源振动激励下桥墩船击事件判别方法研究  

Study on Discrimination Methods for Bridge Pier Ship Collision Events under Multi-source Vibration Excitation

作　　者：何淼 薛经伟 宋永生 丁幼亮[2,3] HE Miao;XUE Jingwei;SONG Yongsheng;DING Youliang(JSTI Group Co.,Ltd.,Nanjing 210019,China;State Key Laboratory of Safety,Durability and Healthy Operation of Long Span Bridges,Nanjing 211112,China;Southeast University,Nanjing 210096,China;Jinling Institute of Technology,Nanjing 211169,China)

机构地区：[1]苏交科集团股份有限公司,南京210019 [2]长大桥梁安全长寿与健康运维全国重点实验室,南京211112 [3]东南大学,南京210096 [4]金陵科技学院,南京211169

出　　处：《现代交通技术》2025年第1期40-43,共4页Modern Transportation Technology

摘　　要：通过分析船舶撞击与车致响应的时程特性、持时指标、时频域指标及傅里叶频谱,提出一种基于傅里叶频谱分析的快速判别方法。研究发现,船舶撞击主振方向的波峰频率始终>20 Hz,而车致响应的波峰频率始终<20 Hz(20 Hz对应波谷处),两者形成显著区分。该方法判别流程简洁且计算量较小,可为桥梁安全运营提供科学依据。The study analyzes the time-history characteristics,duration indicators,time-frequency domain indicators and Fou-rier spectra of ship collisions and vehicular responses.A rapid identification method based on Fourier spectrum analysis is pro-posed.The results show that the dominant frequency peaks of ship collision responses are always above 20 Hz,whereas those of vehicular responses are below 20 Hz,with a trough at 20 Hz,providing a distinct differentiation.The method is character-ized by simplicity and low computational demand,offering a scientific basis for ensuring bridge operational safety.

关 键 词：内河桥梁 船舶撞击 健康监测 傅里叶频谱 快速判别 

分 类 号：U447[建筑科学—桥梁与隧道工程]