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.
作者
何淼
薛经伟
宋永生
丁幼亮
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)
出处
《现代交通技术》
2025年第1期40-43,共4页
Modern Transportation Technology
关键词
内河桥梁
船舶撞击
健康监测
傅里叶频谱
快速判别
inland bridge
ship collision
health monitoring
Fourier spectrum
rapid identification
