考虑风浪相关性影响的高速列车−轨道−跨海斜拉桥时变系统动力响应分析  

Dynamic response analysis of time-varying system of high-speed train−track−sea−crossing cable-stayed bridge under the action of related wind and wave

作　　者：蔡宝锋 谌启发 郭文华[1] 段彬鑫 CAI Baofeng;CHEN Qifa;GUO Wenhua;DUAN Binxin(School of Civil Engineering,Central South University,Changsha 410075,China;China Railway Fifth Survey and Design Institute Group Co.Ltd.,Beijing 102600,China)

机构地区：[1]中南大学土木工程学院,湖南长沙410075 [2]中铁第五勘察设计院集团有限公司,北京102600

出　　处：《中南大学学报(自然科学版)》2025年第2期598-609,共12页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(52078489);中南大学中央高校基本科研业务费专项资金资助项目(2024ZZTS0817);中国铁建股份有限公司科研计划项目(2021-C56);中铁第五勘察设计院集团有限公司科研计划项目(T5Y2021-A03)。

摘　　要：为研究波浪参数及风浪相关性对跨海高铁桥梁车-轨-桥耦合系统的影响,基于耿贝尔逻辑模型,根据实测风浪同步观测数据建立了平均风速-有效波高联合概率模型,并采用谱解法随机生成可考虑相关性影响的风、浪时程曲线。以某跨海高铁双塔斜拉桥为例,基于ANSYS和SIMPACK联合仿真,建立高速列车-轨道-跨海斜拉桥空间振动分析模型,分别开展单独波浪、单独风、相干风浪联合作用下高速列车通过跨海斜拉桥时的空间振动分析,研究有效波高、桥位处水深、风速对车桥动力响应的影响。研究结果表明:波浪作用主要影响列车与桥梁的横向响应,对竖向响应影响较小;波浪作用所致列车和桥梁动力响应随有效波高及桥位处水深增大而增大,且增幅也越来越高;当波高较大时,有效波高是影响车桥系统动力响应的主要因素,当波高较低时,桥位处水深及有效波高对车桥动力响应的影响相当;在波浪作用下,主梁跨中横向位移时程主要包含波浪频率和主梁一阶横弯频率两个频率成分,增大有效波高可使主梁一阶横弯频率成分占比提高;与单独风作用相比,考虑风浪联合作用后,车桥系统动力响应明显增大,在选取风速与波高进行动力响应分析时,应合理考虑风浪相关性。In order to study the effect of wave parameters and the correlation between wind and wave on the train-track-bridge coupling vibration analysis of a sea-crossing high-speed railway bridge,the Gumbel joint probability model was adopted for the correlation of wind and wave based on synchronous observation data of winds and waves.The time histories of wind and wave were simulated by the spectral representation method.As an example in ANSYS and SIMPACK co-simulation,the analysis model of high-speed train and sea-crossing cable-stayed bridge was established.The vibration of high-speed train passing through the sea-crossing cable-stayed bridge under the action of single wave,single wind and related wind and wave were carried out respectively.The effects of significant wave height,water depth and wind speed on the dynamic responses of train and bridge were studied.The results of train-bridge dynamic responses show that wave mainly affects the lateral responses of train and bridge,and has a relatively small impact on the vertical responses.The increase of significant wave height and water depth will both increase the dynamic responses of train and bridge,and the amplification will both be higher.When the effective wave height is large,it is the main factor affecting the dynamic response of train and bridge.When the effective wave height is low,the water depth and the effective wave height have the same impact on the dynamic response.The frequency components in the lateral displacement of the midspan of the main beam under wave action mainly includes the wave frequency and the first-order transverse bending frequency of main beam,and the increase of effective wave height leads to an increase in the first-order transverse bending frequency of main beam.Compared with the wind action,the dynamic responses of train and bridge significantly increases after considering the correlation between wind and wave.The correlation between wind and wave should be considered when determining the wind speed and wave height for dynamic resp

关 键 词：风浪相关性 随机风浪 跨海桥梁 斜拉桥 车-轨-桥耦合振动 

分 类 号：U448.13[建筑科学—桥梁与隧道工程] U441.3[交通运输工程—道路与铁道工程] U238