车门的位置和数量对地铁车辆车体扭转频率的影响  

Influence of the Location and Number of the Door to the Torsional Stiffness of the Subway Car-body

作　　者：李熙梦 朱涛[1] 肖守讷[1] 

机构地区：[1]西南交通大学牵引动力国家重点实验室,四川成都610031

出　　处：《铁道机车车辆》2016年第5期64-68,97,共6页Railway Locomotive & Car

基　　金：国家科技支撑计划项目(2015BAG12B01-15);四川省科技厅应用基础研究项目(2014JY0242)

摘　　要：根据圆轴扭转频率计算公式,推导了基于车体关键设计参数的车体一阶扭转频率计算公式;建立了简化的车体钢结构有限元模型,分析了不同的车门位置和车门数量对车体扭转频率的影响,得到了车门对扭转刚度的影响规律;简化车体的一阶扭转频率计算结果与有限元计算结果进行对比表明,其误差在允许范围之内;最后,基于某实车模型,对车门的位置和数量对车体的扭转频率的影响进行了分析。研究结果表明:推导的简化车体一阶扭转频率计算公式简单有效;车门的位置离端墙越近车体的一阶扭转频率越小,在靠近中间位置扭转频率值达到最大,随着门的数量增加,一阶扭转频率会减小。To study the impact of the position and the number of the door towards the first-order torsional frequency of the car-body steel structure,first of all,formula of the first-order torsional frequency of the car-body based on the key design parameters is deduced according to the circular shaft torsional frequency calculation formula;Secondly,simplified finite element model is established and the impact of the position and the number of the door towards the first-order torsional frequency of the car-body steel structure is analyzed.Based on the above analysis,the influence law of the door on the torsional rigidity is got;meanwhile,the result of deduced formula of the first-order torsional frequency is compared with the FE results.The error value is within the scope of the permit;at last,the impact of the position and the number of the door towards the first-order torsional frequency of the car-body steel structure is analyzed with a real vehicle model.The result shows that deduced formula of the first-order torsional frequency is simple and effective;the closer the door the end wall,the smaller of the first-order torsional frequency.When the door is at the middle of car-body the torsional frequency comes to biggest,and with the number of the door increasing the first-order torsional frequency will decrease.

关 键 词：车体 车门 一阶扭转频率 理论计算 

分 类 号：U270.1[机械工程—车辆工程] U239.5[交通运输工程—载运工具运用工程]