地铁不锈钢车体强度分析及试验验证

针对地铁不锈钢点焊车体的结构特点及不锈钢材料的力学性能,建立车体有限元分析模型,依据相关标准计算车体有限元模型在规定工况下的应力分布及变形。计算结果与试验数据比较表明,有限元分析结果与试验数据基本吻合,为车体结构的进一步优化改进提供了参考依据。     

装空气滤清器的DF8B型机车车体结构改进及减重优化

采用有限元分析软件ANSYS,在对装空气滤清器的DF8B型机车车体原结构进行计算分析的基础上,对该车体结构进行了改进,并采用ANSYS软件的设计优化、拓朴优化等分析方法,对车体结构进行了减重计算分析,指导了机车车体的结构设计。     

出口澳大利亚SDA1型机车车体的设计

对出口澳大利亚的SDA1型机车车体强度标准进行了介绍,介绍了车体的设计特点,并利用有限元分析软件ANSYS对车体的静强度、疲劳强度、刚度进行了有限元计算,据此对相关结构进行了改进。     

换装径向转向架DF8B型机车车体的设计与计算

介绍了换装径向转向架DF8B型机车车体的设计,并利用有限元分析软件ANSYS对车体的强度、刚度、模态进行了有限元计算,据此对相关结构进行了改进。     

机车车体强度计算中载重约束处理浅析

应用有限元方法及ANSYS软件建立了某型调车内燃机车车体结构的有限元分析模型,根据其机车的受力分析和承载特点,选底架作为分析对象,考虑载重的两种处理方式,确定了有限元模型的计算载荷和计算工况以及评定标准,比较了车体在整备状态下的车体静强度以及底架结构的变形情况。结果表明,底架结构的载重在两种处理方式下,其强度和变形相差很小,仅仅相差不到0 .5 %,且皆能满足相关标准的要求。     

ANSYS在机车车体结构设计中的应用

通过介绍某机车车体详细的有限元模型,描述了对车体结构分析的基本过程。并明确了车体有限元分析的主要影响因素以及对车体结构分析的基本步骤,为利用ANSYS对机车车体结构分析提供了参考依据。     

机车车体关键部件的疲劳寿命预测与试验验证

利用多体动力学和有限元结合的方法对机车车体的关键部件进行疲劳寿命预测,首先建立机车整车的多体系统动力学模型,根据设定的工况计算得到机车车体关键部件的载荷时间历程,结合有限元计算得到的车体结构的应力应变结果和材料疲劳特性曲线,基于疲劳损伤理论,利用准静态法对机车车体关键部件的疲劳寿命进行预测。然后利用机车线路试验结果与仿真结果进行对比分析,结果表明准静态法作为预测机车车体疲劳寿命的一种工程应用方法是可行的。     

SDD1B型电传动内燃机车车体设计

介绍了资阳机车有限公司出口苏丹的SDD1B型电传动内燃机车车体的结构设计和计算分析情况。车体采用了外走廊、流线型双司机室结构、模块化设计、侧门防风沙结构设计、独立通风系统设计、活动牵引拉杆座设计和牵引电机通风机风道整体设计;通过对有限元模型的分析计算,该车体设计满足要求。     

高速动力车车体结构的研究

整体承载是在高速动力车车体结构上采用的一种新的机车车体承载方式。沿车体纵、横及水平方向组成一定数量的封闭框架,并由网格梁配合承载蒙皮实现了这一承载方式。通过建立良好的车体结构计算仿真模型,在对采用新型结构的高速动力车车体结构进行大量分析计算的基础上,在保障安全、保证刚度、强度的前提下,实现了车体结构的轻型化。车体结构静强度试验验征了结构的合理性和计算的有效性。     

125MW汽轮机低压内缸应力场的三维壳体有限元计算

采用三维壳体有限元计算方法对125MW汽轮机低压内缸三维温度场、应力场进行了计算分析。对薄体结构的低压内缸进行了有限元分析建模、网格划分;在应力分析过程中采用与温度场相同的有限元网格,减少了工作量,提高了温度场和热应力场的计算精度和计算速度。     

DF8CJ型交流传动货运机车承载车体的研制

利用燃油箱体参与承载的车体钢结构把承载式车体的设计提高到了一个新水平,使内燃机车轴重在不超过23 t的情况下装车功率达到4410 kW,单位轴重功率比达到31.95 kW/t。对提高铁路货运吨位和货运速度都将产生积极的作用。     

Multi‐body modelling and analysis of a planet carrier in a wind turbine gearbox

There have been some recent efforts to numerically model and analyse the wind turbine gearbox. To date, much of the focus has been on increasing model refinement and demonstrating its added value. This paper takes a step back and examines in detail the modelling and analysis of an important wind turbine gearbox component, the planet carrier, in a multi‐body setting. The planet carrier studied in this work comes from the 750 kW wind turbine gearbox used in the National Renewable Energy Laboratory's Gearbox Reliability Collaborative project. The study is performed in two parts. First, the influence of subcomponents mated to the planet carrier in the gearbox assembly is investigated in detail. These components consist of the planet pins, bearings and the main shaft. In the second part of the study, the flexible body modelling of the planet carrier for use in multi‐body simulations is examined through the use of condensed finite element and multi‐body simulation models. Both eigenvalue analyses and time domain simulations are performed. Comparisons are made regarding the eigenfrequencies, categorized mode shapes and the maximum and minimum planet carrier rim deflections from the time domain simulations. The mode shapes are categorized into seven distinct deformation patterns. An actual load case from the dynamometer tests, a 100% rated torque loading, is used in the time domain simulations. The results from this comprehensive study provide an insight into the proper modelling of a wind turbine planet carrier in a multi‐body setting. Copyright © 2012 John Wiley & Sons, Ltd.     

Hydrogen powered car: Two-stage modelling system

This paper presents a research work on intelligent two-stage modelling system to estimate a hydrogen internal combustion engine performances including: engine torque and oxides of nitrogen emissions. In the created models, the ignition timing is chosen as a local input, while the engine speed, throttle position, injection duration, injection end angle and lambda are chosen as global inputs. While previous papers [1], [2], [3] and [4] included tuning procedures and hydrogen engine performances, intelligent emissions prediction of hydrogen car, and two-stage modelling of torque, this paper carries on from those observations to develop a completed two-stage modelling system of the converted hydrogen engine. More details on individual two-stage models are provided based on data recorded during the fine tuning process on dynamometer. This work is a step towards establishing intelligent two-stage modelling of hydrogen powered car via application of response surface methodology with hydrogen engine in the loop simulation and testing.     

SDD13型电传动内燃动车车体设计

介绍了资阳机车有限公司出口马来西亚的SDD13型动车车体的主要技术参数、结构设计以及强度计算分析情况。车体采用了内走廊、流线型单司机室、耐腐蚀材料、中心销牵引、集气箱结构设计。计算结果表明,该车体强度满足要求。     

车体模态测试仿真

对车体模态测试进行了数值仿真,研究了激振点位置、方向和支撑约束对响应信号的影响,提出可以在车体模态测试中合理选择激振位置和方向,从而提高模态测试的质量。     

重型轨道车车体设计计算初探

叙述了重型轨道车车体的结构特点、计算模型、计算载荷和计算工况 ,以及车体强度和刚度的评定标准。最后通过计算分析 ,校验说明该车体结构设计合理 ,满足了机车总体布置和国家相关标准对机车静强度的要求。     

Modelling future private car energy demand in Ireland

Targeted measures influencing vehicle technology are increasingly a tool of energy policy makers within the EU as a means of meeting energy efficiency, renewable energy, climate change and energy security goals. This paper develops the modelling capacity for analysing and evaluating such legislation, with a focus on private car energy demand. We populate a baseline car stock and car activity model for Ireland to 2025 using historical car stock data. The model takes account of the lifetime survival profile of different car types, the trends in vehicle activity over the fleet and the fuel price and income elasticities of new car sales and total fleet activity. The impacts of many policy alternatives may only be simulated by such a bottom-up approach, which can aid policy development and evaluation. The level of detail achieved provides specific insights into the technological drivers of energy consumption, thus aiding planning for meeting climate targets. This paper focuses on the methodology and baseline scenario. Baseline results for Ireland forecast a decline in private car energy demand growth (0.2%, compared with 4% in the period 2000–2008), caused by the relative growth in fleet efficiency compared with activity.     

DL4W型仿古有轨电车

DL4W型仿古有轨电车是用于大连市城市轨道交通201、203号线路替代旧电车的新型单节有轨电车,该车的外观及车体内装饰采用仿古设计,其核心技术采用交流传动驱动、微机控制监测和操纵、空气弹簧减振、弹性车轮降噪等先进技术。简要介绍了该车辆的总体结构、主要技术参数、动力学性能计算、车体钢结构、转向架构架和摇枕等关键零部件强度计算,以及整车线路性能试验的情况。