Truck trip generation in small- and medium-sized urban areas

This paper describes procedures to develop truck trip generation (TTG) rates for small- and medium-sized urban areas and its implications. Ordinary least squares models are used to develop separate truck production and attraction equations with the number of employees as the independent variable for three industrial groups – retail, transportation and warehousing, and manufacturing. Results from this research indicate that number of employees is a statistically significant predictor, and has significant explanatory power in predicting the number of truck trips produced and attracted. The rates developed in this study are also found to be significantly different from rates developed in other studies with the implication that caution needs to be taken when transferring TTG rates. The rates are applied in a travel demand model as the initial step of incorporating truck traffic into the modeling process.     

EPS钢切换应用技术研究

免酸洗绿色清洁表面处理技术(Eco Pickled Surface,EPS)是一种热轧钢卷(板)表面处理技术.针对EPS钢板在载货汽车车架上的切换应用进行了相关技术研究,研究内容主要包括材料性能验证及剪切、冲压、涂装、装配等相关生产工艺验证,验证结果满足现生产使用要求,达到分阶段切换目的.研究内容为EPS钢板切换应用推...     

载货汽车驾驶室疲劳寿命的敏感度分析

针对某重型载货汽车驾驶室底板发生开裂破坏的现象,建立了包含驾驶室柔性体的刚弹耦合动力学模型。由实测信号作为输入计算得到柔性体的应变-时间历程,进行驾驶室底板的疲劳寿命分析。在此基础上通过软件集成,以载荷幅值和材料特性为变量,用蒙特卡洛方法进行了疲劳寿命的敏感度分析,找到了影响较大的因素,为改进结构提供了依据。     

重型货车驾驶室顶压强度研究

总结了货车常见事故类型,回顾了具有较大影响力的货车被动安全法规;针对我国即将实施的<商用车驾驶室乘员保护>法规以及出口认证的需求,进行了某型货车驾驶室顶压强度试验,并在此基础上进行了仿真分析对比.仿真与试验结果比较一致,证明该驾驶室符合法规要求.     

Possibility of jamming and wedging in the three-piece trucks of a moving freight car

Three-piece trucks have some drawbacks, particularly unstable operation of the friction wedge damping system. One of the principal features of systems of this kind is the possibility of jamming and wedging. This work is devoted to mathematical and numerical modeling of the plane motion of a freight car with allowance for the mobility of the wedges and then for the compliance of the contacting bodies and to the study of the conditions for the onset of jamming and wedging when the car is in motion.     

高强钢在非公路自卸车上装轻量化中的应用

本文从上装质量、强度、成本等方面对高强钢在非公路自卸上装轻量化中的使用优势进行对比分析,并以非公路上装底板总成为例进行简单的有限元分析以论证高强钢的使用效果。     

高顶驾驶室顶部强度试验仿真分析及验证

为验证某款高顶驾驶室顶部强度和生存空间是否满足相关法规要求,对其建立了有限元模型和假人模型,进行了驾驶室顶部强度的试验仿真,获得了驾驶室变形情况和驾驶员生存空间变化情况。仿真结果和实车试验结果对比分析表明,两者吻合良好,且该高顶驾驶室能够满足GB 26512-2011顶部强度试验要求并能够保证驾驶员的生存空间要求。     

某重型卡车驾驶室抖动问题分析

摘要：针对国内某企业生产的重型卡车,部分车辆出现的驾驶室异常抖动现象,对问题车辆进行了整车振动信号检测实验。利用数字信号分析处理技术以及振动信号分析理论对驾驶室抖动的原因进行了分析。通过振动信号的互功率谱密度分析和相干性函数分析寻找到了驾驶室抖动的振源,再利用整车关键位置振动信号的自功率谱函数分析,诊断出造成驾驶室抖动的问题原因,最后根据分析提出了解决驾驶室异常抖动的方案。     

铝合金型材在汽车驾驶室上的应用

介绍了铝合金型材驾驶室的优点,分析了铝合金型材的挤压工艺及焊接工艺性。     

基于CATIA的自卸车上装参数化及模块化设计

本文基于参数化、人机交互人性化和模块化的思想对CATIA软件进行了二次开发,对自卸车上装各部分进行快速建模。缩短自卸车上装的设计周期,提高设计效率。