基于ANSYS和SIMPACK联合仿真的大跨钢箱提篮拱桥车-桥耦合振动分析  

Analysis of coupled vibration between a long span steel-box basket-handle arch bridge and vehicle by co-simulation based on ANSYS and SIMPACK

作　　者：黄永明[1,2] 何旭辉[1,2] 邹云峰[1,2] 史康 左太辉 李玲瑶[1,2] HUANG Yong-ming;HE Xu-hui;ZOU Yun-feng;SHI Kang;ZUO Tai-hui;LI Ling-yao(School of Civil Engineering,Central South University,Changsha 410075,Hunan,China;National Engineering Laboratory for High Speed Railway Construction,Central South University,Changsha 410075,Hunan,China;China Merchants Chongqing Communications Technology Research & Design Institute Co.,Lid,Chongqing 400067,China)

机构地区：[1]中南大学土木工程学院,湖南长沙410075 [2]中南大学高速铁路建造技术国家工程实验室,湖南长沙410075 [3]招商局重庆交通科研设计院有限公司,重庆400067

出　　处：《长安大学学报（自然科学版）》2019年第5期68-77,共10页Journal of Chang’an University(Natural Science Edition)

基　　金：国家自然科学基金项目(51508580,U1534206,51508574,51708202);国家重点研发计划项目(2017YFB1201204);湖南省自然科学基金项目(2016JJ3149)

摘　　要：为高效求解高速铁路大跨钢箱提篮拱桥车-桥耦合振动特性,并考虑列车系统弹簧阻尼系与轮轨接触的非线性特征,充分利用ANSYS和SIMAPCK软件平台各自优势,提出了一套可高效求解复杂车桥耦合系统的分析方法。该方法利用ANSYS作为前处理,建立大跨钢箱提篮拱桥精细化有限元模型,运行Lanczos法进行模态分析,再利用HBMAT命令提取桥梁关键模态信息作为关键输入文件,而列车与轮轨接触在SIMPACK平台构建。通过SIMAPCK读取ANSYS输入的关键数据文件,建立车桥耦合分析的动力学模型。运用SIMPACK中的有限元接口模块(Flex Modal)构建一个质量可以忽略的虚刚体实现列车与桥梁的耦合。最后,以实测南广(南宁-广州)铁路西江特大桥动力响应数据为分析样本,通过计算值与实测值的对比,验证提出的方法的可靠性。结果表明:基于ANSYS和SIMPACK的联合仿真是开展车-桥耦合振动研究的有效方法;由轨道不平顺或轮对蛇行运动引起的周期性激励可能引发横向共振,而发生竖向共振的可能性较小;桥梁结构横向振幅由于受车辆偏载影响较大,单线行车的横向振幅大于双线行车;受激励频率的影响,竖向舒适度指标和加速度可能不随车速单调递增;脱轨系数、轮重减载率、竖向舒适度指标和加速度受活载导致的竖向振动影响较大,而横向舒适度指标和加速度则受偏载效应影响较大。研究结果可为类似桥梁的动力设计提供参考。To efficiently solve the characteristics of coupled vibration between a long span steel-box basket-handle arch bridge and vehicle, and consider the nonlinear characteristics of spring damping train system and wheel-rail contact, an efficient method for solving complex vehicle-bridge coupling systems was proposed, based on making full use of the advantages of ANSYS and SIMAPCK software platform. ANSYS was considered as pre-processing of the method, to establish a refined finite element model of the long span steel-box basket-handle arch bridge. The Lanczos method was used to model analysis, and the HBMAT command was used to extract the key modal information of the bridge as the key input file. The train contact with the wheel rail was established in SIMPACK platform. By reading the key inputs data of ANSYS files on SIMPACK, the dynamic model of the vehicle-bridge coupling analysis was established. The finite element interface module(Flex Modal) in SIMPACK was used to construct a virtual rigid body implementation with negligible quality to achieve the coupling of train and bridge. Finally, the dynamic response data of the Xijiang Bridge of Nanguang Railway was used as an example, and the reliability of the method was verified by comparing the calculated value with the measured value. The results show that the co-simulation based on ANSYS and SIMPACK is an effective method to study the coupling vibration between vehicle and bridge. The periodic excitation caused by the un-smoothness of the track or the snake motion of wheel may induce lateral resonance, however, the possibility of vertical resonance is small. In addition, because of the lateral amplitude of the bridge is greatly influenced by unbalance loading of vehicle, the lateral amplitude under single-line vehicle is larger than that of double-line vehicle. The vertical comfort index and acceleration may not increase monotonically with the running speed due to the influence of excitation frequency. Furthermore, the derailment coefficient, rate of wheel load red

关 键 词：桥梁工程 钢箱提篮拱桥 耦合振动 联合仿真 多体动力学 现场实测 

分 类 号：U441.[建筑科学—桥梁与隧道工程]