【作者】 王林；

【导师】 林凤涛； 许自强；

【作者基本信息】 华东交通大学 ， 交通运输工程（专业学位）， 2019， 硕士

【摘要】 随着我国高速铁路网的不断延伸,高铁已经融入了人们的日常出行和生活,为我国的经济和社会的快速发展做出了重要的贡献,但随着高速列车的不断运行,车轮失圆问题也成为影响高速列车安全平稳运行的重要因素之一。车轮多边形作为车轮失圆的主要形式之一,其所引起的高频振动对列车的安全平稳运行产生许多不利的影响。本文以CRH3型技术平台动车组为研究对象,利用有限元软件ANASYS和动力学软件SIMPACK建立考虑弹性轮对的CRH3型动车组整车模型,并将武广线实测的车轮多边形数据和轨道不平顺激扰引入模型,分别对10~30阶的高阶多边形进行限值仿真研究。一,本文通过对CRH3型动车组的车轮多边形故障进行汇总分析,发现高阶车轮多边形的阶次大部分处于17~20阶,而且广铁集团的CRH3型车的多边形故障率最高,东北地区最低。随后以武广线服役中的CRH3型动车组为研究对象,分析了车轮多边形镟修前后引起的振动数据,发现多边形车轮会使轴箱出现明显的高频垂向振动,而对构架和车体振动并无明显影响,但一系悬挂并没有消除多边形车轮引起的振动能量,而二系悬挂可以消除相当量的振动能量。二,本文以实测多边形为基础构造出10~30阶的多边形车轮,在列车速度处于300km/h时,分别对25dB车轮多边形粗糙度限值、170kN轮轨垂向力限值和100g轴箱垂向振动限值三个限值条件下的轮轨垂向力和轴箱垂向振动进行仿真分析,研究发现轮轨垂向力和轴箱垂向振动总体上随着车轮多边形阶次的增加而增加,而且25dB和100g时的轮轨垂向力和轴箱垂向振动均小于170kN时,因此以25dB和100g为限值满足规定的170kN轮轨力限值;三,对25dB、100g和170kN三个限值时列车运行的安全性、平稳性和车轮磨耗指数进行分析,发现车轮多边形阶次的增加对脱轨系数、构架横垂振动和车体平稳性的影响较小,轮重减载率和轮轴横向力随阶次的增加而增加,且在三个限值条件下的列车运行安全性和平稳性指标均符合我国现行的标准要求。更多还原

【Abstract】 With the continuous extension of China’s high-speed railway network,high-speed rail has been integrated into people’s daily travel life,and has made important contributions to China’s rapid economic and social development,however,with the continuous operation of high-speed trains,the problem of wheel loss has become one of the important factors affecting the safe and stable operation of high-speed trains.Wheel polygon is one of the main forms of wheel loss,and the high frequency vibration caused by it has many adverse effects on the safe and stable operation of the train.This thesis takes the CRH3 technology platform EMU as the research object,and uses the finite element software ANASYS and the dynamics software SIMPACK to build the CRH3 EMU model considering the elastic wheel-set,and introduce the measured wheel polygon data and track irregularity disturbance on the Wuhan-Guangzhou line into the model to carry out the limit simulation of high-order polygons from 10 to 30 orders.Firstly,this thesis summarizes the wheel polygon faults of CRH3 EMUs and finds that the order of high-order wheel polygons is mostly in the order of 17~20,and the CRH3 of Guangzhou Railway Group has the highest polygon failure rate and the lowest in Northeast China.Then,this thesis is based on the analysis of the vibration data caused by the wheel polygon repair of CRH3 EMUs on the Wuhan-Guangzhou line,it finds that the polygonal wheel will cause obvious high-frequency vertical vibration of the axle box.However,the suspension of a series does not eliminate the vibration energy caused by the polygonal wheel,but the secondary suspension can eliminate a considerable amount of vibration energy.Second,this thesis is based on the measured polygons,this paper constructs 10~30-order polygon wheels.When the train speed is 300km/h,the 25 dB wheel polygon roughness limit,170 kN wheel rail vertical force limit and 100 g axle box vertical The wheel-rail vertical force and the vertical vibration of the axle box under the vibration limit condition are simulated and analyzed.It is found that the vertical force of the wheel-rail and the vertical vibration of the axlebox increase with the increase of the wheel polygon order,and 25 dB and When the wheel-rail vertical force and the vertical vibration of the axle box are less than 170 kN at 100 g,the specified 170 kN wheel-rail force limit is satisfied with the limits of 25 dB and 100g;Third,this thesis analyzes the train safety,stationarity and wheel wear index with the three limits of 25 dB,100g and 170 kN,it is found that the increase of the wheel polygon order has less influence on the derailment coefficient,the frame sagging vibration and the vehicle body stability,the wheel load shedding rate and the axle lateral force increase with the increase of the order,and the train operation safety and stability indicators under the three limit conditions are in line with China’s current standard requirements.更多还原