摘要
高速动车组车体模态频率一旦与外部激励频率接近,会导致车辆发生异常振动问题,严重影响车辆动力学性能,而车体一阶菱形模态频率与车轮磨耗后期转向架蛇行运动频率接近产生的抖车问题一直制约车轮旋修周期,因此需开展车体模态频率提升工作研究。餐车作为高速动车组编组主要车型之一,其平面布局和车体结构与其他车辆相比具有特殊性。因此,本文基于以往动车组车体模态频率提升方案,利用有限元分析方法,结合工程实施可行性,首次研究提升餐车车体模态频率的结构设计方案,包括在客室两端分别增加不同型式的内端墙结构和同时增加内端墙方案,以实现整备状态下,餐车车体一阶菱形模态频率需满足高于10Hz的要求。研究结果显示,由于餐车客室区域1位端靠近车体中心,仅在1位端增加单个内端墙结构即可实现整备状态车体一阶菱形模态频率高于10Hz的设计目标。
Once the mode frequency of the carbody of the high-speed EMU is close to the external excitation frequency,it will lead to abnormal vibration of the vehicle and seriously affect the dynamic performance of the vehicle.The problem of shaking of vehicle because the first-order diamond distortion modal frequency of the carbody is close to the hunting frequency of the bogie in the later stage of wheel wear has always restricted the wheel repair cycle,so it is necessary to carry out research on the mode frequency improvement of the carbody.As one of the main vehicle type of high-speed EMUs,the dining car has its particularity in plane layout and carbody structure compared with other vehicles.Therefore,based on the previous scheme of lifting modal frequency of EMU carbody,this paper uses the finite element analysis method,combined with the feasibility of engineering implementation,to study the structural design scheme of improving the mode frequency of the dining carbody for the first time,including adding different types of inner end wall structures at both ends of the passenger room and adding the inner end walls at the same time.In order to achieve the first-order diamond distortion modal frequency of the dining carbody to meet the requirements of more than 10 Hz in service.The results show that because the end 1 of the dining car compartment area is close to the center of the carbody,only adding a single inner end wall structure at the end 1 can achieve the design goal of the first-order diamond distortion modal frequency more than 10 Hz in service.
作者
赵慧
王成强
董雪妍
赵子珺
ZHAO Hui;WANG Chengqiang;DONG Xueyan;ZHAO Zijun(State Railway Passenger Car Engineering Research Center of Railway Vehicle,CRRC Changchun Railway Vehicle Co.,Ltd.,Changchun 130000,China;School of Engineering,Changchun Normal University,Changchun 130000,China)
出处
《铁道车辆》
2024年第3期33-37,共5页
Rolling Stock
基金
中国国家铁路集团有限公司系统性重大项目(P2019J007)。
关键词
动车组
车体
菱形模态
内端墙
设计结构
EMU
carbody
diamond distortion modal
inner end wall
design structure
