上海国产化地铁列车设计中的CAE技术

介绍了计算机辅助工程(CAE)在上海地铁车辆设计中的重要用用,分析了地铁铝合金车体结构,从车体结构强度、车体模态分析、车体稳定性分析、车体碰撞安全性分析等方面介绍了CAE技术在上海地铁国辆设计中的应用.     

140t铁水包车改造开发

介绍了信钢公司改造设计炼钢厂140t铁水包车的过程,结合炼钢厂实际需要,本着安全、耐用、维修方便的原则,优化车体结构,改造使用至今,取得了满意的效果。     

HXD2型机车车体的强度计算与试验研究

从对“和谐2”HXD2型交流传动重载货运电力机车车体的设计要求出发,重点分析了HXD2机车车体强度计算和型式试验的特点和优势．介绍了车体静强度、疲劳强度、动力模态和设备紧固件强度计算以及车体强度型式试验。试验表明,车体的强度和模态满足设计要求。     

基于通用化设计的车体钢结构设计管理

在研究通用化设计和产品设计管理的基础上,依据车辆车体钢结构具体设计的整个过程,提出了一种新的车体钢结构设计管理方法.通过实例化列车车体设计过程,介绍了通用化设计管理平台在整个项目工作过程中的应用,验证了基于通用化设计的车体钢结构设计管理技术.为车辆的车体结构设计人员提供了一种新的通用化设计管理思路.     

城轨车辆不锈钢车体结构设计与材料性能等级选择

本文介绍了城轨车辆不锈钢车体结构设计、材料力学性能等级的选择,为不锈钢车体开发提供设计思路。     

2O'ZELR型电力机车车体设计

介绍了2O’ZELR型电力机车车体的主要技术和结构特点,主要对车体结构、牵引缓冲装置、司机室及车内生活设施的设计进行了设计阐述和说明。     

入口钢卷小车钢卷车设计

本设计内容是冷轧脱脂机组中入口钢卷小车钢卷车部分。主要介绍了冷轧脱脂生产线、入口钢卷小车的用途特点、布置形式和结构组成。通过对比确定了钢卷车升降运动的实现形式,确定了钢卷车体、V型升降座、小车车轮的具体结构。     

轨道类游艺机在弯曲轨道上的受力分析

在轨道类游艺机车体和轨道设计,中横倾角的配置、轨距及车体质心高度的设计对该游艺机能否安全稳定的运行起决定性作用。以滑行车为例对轨道类游艺机在弯曲轨道上的受力进行分析,得到了横倾角的计算公式,并给出了实际配置横倾角时的原则,也给出了在尽可能保证车体能平稳运行时轨距的设计和车体质心高度配置时的原则。依据所给出的原则可指导游艺机车厢(轴类)、轨道部分和动力的设计和校核。     

列车车体扭转振动灵敏度分析

首先介绍了灵敏度分析的基本原理,然后基于一维波动方程,导出了标准梁的扭转振动频率方程,结合列车车体中空薄壁型腔截面的特点,根据不同位置的截面特性,将车体分成多段等截面梁,以获取不同车体分段的截面信息。运用刚度串联原理,引入与车体结构特征密切相关的修正系数,得到车体的一阶扭转振动频率方程。以某型高速列车为例,公式的解析计算结果与有限元结果的误差为-2.036%,在工程误差要求范围内。最后,以该解析公式为依据,选取了车体的8组设计参数对车体进行了灵敏度分析,并得到了对车体扭转振动频率影响较大的4组设计参数,为列车车体设计相关工作提供了设计参考依据。     

基于多学科优化方法的机车车体轻量化

介绍了基于多学科优化平台Isight的机车车体轻量化优化方法,该方法包括确定设计变量和约束变量、选定参与优化计算的设计变量、优化解的确定方法、优化解全工况验证等主要内容,使用该方法对某机车车体进行优化,车体减重达到10%,减重效果显著。     

30t轴重浴盆式敞车车体模态分析

利用ANSYS软件建立了30t轴重浴盆式敞车的车体有限元模型,介绍了车体模态分析的基本理论,并用Block Lanczos方法对浴盆式敞车车体进行了模态分析,得到了浴盆式敞车车体的前六阶固有频率及相应振型。分析结果表明：该敞车以横向振动为主,车体的一阶扭转模态频率为5．086Hz,侧墙的一阶横向弯曲模态频率为10．134Hz,振动幅度较大的区域集中在与撑杆相连接的侧墙上。而当振动频率迭到26．939Hz时,浴盆式敞车车体没有出现垂向弯曲振动,说明该敞车车体满足满足AAR《货车设计制造规范》标准的要求。     

A lightweight design approach for an EMU carbody using a material selection method and size optimization

This study proposes a weight reduction design approach for urban transit carbody using a material selection method and size optimization. First, the material selection method, which uses specific stiffness and strength indices to predict the weight reduction rate, is set up when the materials of the under-frame and roof structure are substituted. The CFRP was chosen as the best weight reduction material in terms of the material selection method but was not appropriate for application to an urban transit carbody as a thin panel because of out-of-plane deformation. Therefore, we applied CFRP-AL honeycomb sandwich composites to the under-frame and roof structures, and the size optimization method was subsequently applied to derive a lightweight composite hybrid carbody design. Finally, the proposed approach was applied to an urban transit carbody, i.e., a Korean electrical multiple units carbody made of aluminum extrusion profiles. The weight of the optimized composite hybrid carbody design was 29.0% lighter than that of the original K-EMU. The resulting composite hybrid carbody design satisfied the design guidelines of the Performance test standard for K-EMU according to the corresponding FE simulations.

     

某车体吊挂设备模态分析

以CRH5某车体为载体,应用有限元软件HyperMesh和Ⅰ-DEAS对未吊挂和吊挂设备的车体分别进行了模态计算,吊挂设备时用了3种方案模拟设备.分析了各方案对结果的影响.对精确的计算车体整备状态下的模态有很重要的意义.     

Carbody hunting investigation of a high speed passenger car

This paper describes the low frequency carbody hunting problem of a high speed passenger car emerged in the process of tests and service operations. It causes a significant deterioration of lateral comfort. First, the vehicle model is established as a multiple rigid body system. Using root locus analysis, the effect of system parameters on the carbody hunting stability has been studied. It shows that carbody hunting instability has something to do with suspension parameters and wheel/rail conditions. To find the causes of this carbody hunting problem, component tests have been carried out. Based on the theoretical hunting stability analysis and component tests, solutions are proposed and then validated in the field test.     

Effect of train carbody’s parameters on vertical bending stiffness performance

Finite element analysis(FEA) and modal test are main methods to give the first-order vertical bending vibration frequency of train carbody at present, but they are inefficiency and waste plenty of time. Based on Timoshenko beam theory, the bending deformation, moment of inertia and shear deformation are considered. Carbody is divided into some parts with the same length, and it’s stiffness is calculated with series principle, it’s cross section area, moment of inertia and shear shape coefficient is equivalent by segment length, and the fimal corrected first-order vertical bending vibration frequency analytical formula is deduced. There are 6 simple carbodies and 1 real carbody as examples to test the formula, all analysis frequencies are very close to their FEA frequencies, and especially for the real carbody, the error between analysis and experiment frequency is 0.75%. Based on the analytic formula, sensitivity analysis of the real carbody’s design parameters is done, and some main parameters are found. The series principle of carbody stiffness is introduced into Timoshenko beam theory to deduce a formula, which can estimate the first-order vertical bending vibration frequency of carbody quickly without traditional FEA method and provide a reference to design engineers.     

货运动车组车体-集装箱耦合振动特性研究

目前我国货运动车组正在研制中,货运列车速度的提升将对车辆振动产生重要影响,既有不考虑车-货间耦合作用的研究方式将不再能准确反映高速货运动车组的振动特性。考虑车辆与其所承载集装箱的耦合关系,建立货运动车组动力学模型,研究不同速度等级下车体和集装箱的响应特征,对比车体与集装箱体间是否采用耦合关系的情况下系统振动特征的异同点,获得车体及集装箱在两种模型处理方式下车体端部和中部集装箱、车体、构架横向加速度和摇头角加速度等的时频域特性。结果表明,研究车速200 km/h以上的货运动车组的动力学特性时需要考虑车体-集装箱之间耦合振动关系;考虑车体-集装箱耦合振动关系后,可反映集装箱的振动引起车体和构架在某些频段内振动幅值增大、振动能量增加及车体端部集装箱的横向振动大于中部集装箱等特征。     

车轮磨耗下车下悬吊系统振动特性研究

为研究高速动车组车下悬吊系统在车轮磨耗下的振动特性演变规律,建立考虑车体弹性振动和车下悬吊设备的刚柔耦合动力学模型,分析一个镟轮周期内车轮磨耗对车体和车下悬吊设备振动响应的影响。研究结果表明:车轮磨耗主要影响车下悬吊系统的横向振动,对垂向振动影响较小;在前5万km运营里程下,车体和车下设备的振动特性基本保持不变,随着里程的增加,车体和悬吊设备的振动特性不断恶化,当运营里程达到19.1万km时,车体和悬吊设备的振动加速度幅值达到了新轮下的2倍;车辆运行速度不高于140 km/h时,车轮磨耗对车体和设备的振动影响甚微,随着速度的增加,车轮磨耗对车体和悬吊设备的影响逐渐增大;通过选取合理的横向悬吊刚度可以有效抑制车轮磨耗对悬吊系统的影响,其取值范围在0.7~1.5 MN/m内比较合适。     

Carbody structural lightweighting based on implicit parameterized model

Most of recent research on carbody lightweighting has focused on substitute material and new processing technologies rather than structures. However, new materials and processing techniques inevitably lead to higher costs. Also, material substitution and processing lightweighting have to be realized through body structural profiles and locations. In the huge conventional workload of lightweight optimization, model modifications involve heavy manual work, and it always leads to a large number of iteration calculations. As a new technique in carbody lightweighting, the implicit parameterization is used to optimize the carbody structure to improve the materials utilization rate in this paper. The implicit parameterized structural modeling enables the use of automatic modification and rapid multidisciplinary design optimization （MDO） in carbody structure, which is impossible in the traditional structure finite element method （FEM） without parameterization. The structural SFE parameterized model is built in accordance with the car structural FE model in concept development stage, and it is validated by some structural performance data. The validated SFE structural parameterized model can be used to generate rapidly and automatically FE model and evaluate different design variables group in the integrated MDO loop. The lightweighting result of body-in-white （BIW） after the optimization rounds reveals that the implicit parameterized model makes automatic MDO feasible and can significantly improve the computational efficiency of carbody structural lightweighting. This paper proposes the integrated method of implicit parameterized model and MDO, which has the obvious practical advantage and industrial significance in the carbody structural lightweighting design.     

铝合金车体结构焊接变形的调修方法研究

调修是矫正车体焊后产生的残余变形的重要途径,通过对铝合金调修方法的介绍,运用合理的调修方法,最终实现轨道车辆铝合金车体焊后尺寸控制,该方法可以满足铝合金车体生产品质要求。     

中白货运1型机车车体结构研究

介绍了中白货运1型机车车体的结构特点、参数,阐述了车体主要部件的结构,并对车体结构进行了强度计算分析,计算结果表明,车体结构强度满足要求。