湖南大学学报（自然科学版）2024，Vol.51Issue(7)：10-20,11.DOI:10.16339/j.cnki.hdxbzkb.2024063
铁路悬索桥车致纵向运动混合阻尼减振研究
Study on Hybrid Damping Solution for Controlling Longitudinal Motion of Railway Suspension Bridge Induced by Trains
摘要
Abstract
A novel hybrid damping scheme was proposed to control the longitudinal motion response at the girder ends during train passage on a railway suspension bridge,utilized multiple types of dampers to control girder-end displacements to meet diverse vibration reduction requirements.With a long-span railway suspension bridge under construction as the engineering background,a detailed spatial truss model and an equivalent single beam simplified model were established.The study systematically investigates the influence of different damper parameters in the hybrid damping scheme on motion control effectiveness.The proposed solution involves installing low-exponent fluid viscous dampers longitudinally between the bridge tower and the stiffening girder.Simultaneously,eddy current dampers are installed longitudinally between the bridge abutment and the stiffening girder.Considering the unique characteristics of the bridge abutment structure,the eddy current dampers are designed as devices capable of withstanding only compressive loads and validated through prototype testing.To further enhance damping performance,the eddy current dampers are equipped with a friction energy dissipation component.This hybrid damping solution effectively controls the longitudinal motion response at the girder ends during train passage,significantly improving the safety and durability of bridge structures.The findings have significant reference value and practical implications for similar engineering projects.关键词
铁路悬索桥/梁端纵向运动控制/混合阻尼减振/低指数黏滞阻尼器/电涡流阻尼器Key words
railway suspension bridge/girder-end longitudinal motion control/hybrid damping solution/low-exponent fluid viscous damper/eddy current damper分类
交通工程引用本文复制引用
封周权,范周健,井昊坤,张弘毅,陈政清,万田保..铁路悬索桥车致纵向运动混合阻尼减振研究[J].湖南大学学报（自然科学版）,2024,51(7):10-20,11.基金项目
国家自然科学基金资助项目(52178284),National Natural Science Foundation of China(52178284) （52178284）
湖南省自然科学基金资助项目(2021JJ30106),Natural Science Foundation of Hunan Province(2021JJ30106) （2021JJ30106）
