非均匀流作用下悬浮隧道管体动力响应分析  

Dynamic Response Analysis of Submerged Floating Tunnel TubeUnder Non-Uniform Flow

作　　者：杨赢 王晓东 李春生 何余良 YANG Ying;WANG Xiaodong;LI Chunsheng;HE Yuliang(School of Civil Engineering,Shaoxing University,Shaoxing,Zhejiang 312000;Zhejiang Communications Construction Group Co.,Ltd.,Hangzhou,Zhejiang 310051)

机构地区：[1]绍兴文理学院土木工程学院,浙江绍兴312000 [2]浙江交工集团股份有限公司,浙江杭州310052

出　　处：《绍兴文理学院学报》2023年第8期11-17,共7页Journal of Shaoxing University

基　　金：浙江省自然科学基金项目“悬浮隧道施工过程管体涡激振动机理及控制研究”(LQ19E090008);浙江大学-浙江交工协同创新联合研究中心资助项目“悬浮隧道施工及运营阶段的动力响应机理和控制研究”(ZDJG2021009).

摘　　要：为研究非均匀流作用下悬浮隧道管体的动力响应规律,在ABAQUS中建立悬浮隧道整体有限元模型.考虑沿管体纵向的流速不均匀分布,在UAMP子程序中采用Morison方程计算流体力,实现流固耦合效应的简化模拟,得到非均匀流作用下悬浮隧道管体的动力响应,并对流速大小和分布的影响进行参数研究.结果表明:由于管体自振频率与涡激频率相差较大,一般不会引发涡激共振.非均匀流中流体激励频率范围大,管体呈现多频振动的特征.管体的位移包络线形状与流速分布基本一致,最大位移出现在流速最大处.随着流速增大,管体顺流向会率先产生共振,在设计时应予以考虑.To study the dynamic response law of the submerged floating tunnel(SFT)tube under the action of non-uniform flow,an overall finite element model of the SFT was established by ABAQUS considering the non-uniform distribution of flow velocity along the longitudinal direction.The Morison equation was used to calculate the fluid force in the UAMP subroutine to achieve the simplified simulation of the fluid-structure interaction.The dynamic response of the SFT tube under non-uniform flow was obtained,and the influence of the magnitude and distribution of flow velocity was studied.The results show that owing to the significant difference between the natural vibration frequency of the tube and the vortex excitation frequency,the vortex induced resonance is not easy to be caused.The fluid excitation frequency range in the non-uniform flow is large,and the tube is characterized by a multi-frequency vibration.The displacement envelope shape of the tube is basically consistent with the velocity distribution,and the maximum displacement occurs at the point with maximum velocity.With the increase of flow velocity,resonance will first occur in the downstream direction of the tube,which should be considered in the design.

关 键 词：悬浮隧道 非均匀流 流体力 UAMP子程序 数值模拟 

分 类 号：U459.5[建筑科学—桥梁与隧道工程]