某站场地基强夯振动影响范围研究

针对某站场地基采用6000kN·m夯击能强夯加固海漫滩填海区工程，现场测试了地表振动速度，在此基础上，分析研究了振动在水平方向的衰减规律、主振频率等，分析了拟建场地边立交桥在不同夯击能下的安全距离．结果表明：地表最大振动速度的衰减规律满足乘幂关系；强夯产生的振动的主振频率均处于10Hz以下；以地表振动速度作为判别标准，测得该场地在6000kN·m夯击能下对立交桥的安全距离为30m．     

浅谈长距离泵送混凝土的改善工艺

文章结合工程实例，分析了施工过程中因长距离泵送混凝土而使桥梁桩基在水下混凝土灌注时出现断桩的主要影响因素，并就改善长距离泵送混凝土工艺，防止水下混凝土灌注出现断桩的措施进行了探讨。     

回转支承应用于平地机驱动桥与平衡箱联接

针对平地机后驱动桥与平衡箱联接存在零件加工和安装精度要求高、联接受力复杂、普通轴承易损坏、可靠性差等问题。提出了采用专用、特殊的轴承——回转支承联接的方法。通过适当选型并经过计算验证，该方法满足了平地机后驱动桥和平衡箱联接的强度和工作要求，且方便可行。     

Virtual test rig to improve the design and optimisation process of the vehicle steering and suspension systems

A virtual test rig is presented using a three-dimensional model of the elasto-kinematic behaviour of a vehicle. A general approach is put forward to determine the three-dimensional position of the body and the main parameters which influence the handling of the vehicle. For the design process, the variable input data are the longitudinal and lateral acceleration and the curve radius, which are defined by the user as a design goal. For the optimisation process, once the vehicle has been built, the variable input data are the travel of the four struts and the steering wheel angle, which is obtained through monitoring the vehicle. The virtual test rig has been applied to a standard vehicle and the validity of the results has been proven.     

斯太尔汽车双前轴转向机构分析及其应用

本文在对斯太尔重型汽车的双轴转向传动机构进行分析的基础上建立了数学模型,研究了各部分的传动过程,并采用MATLAB语言编写了转向传动机构分析程序,对转向轴内外轮之间,前后轮间的转角匹配,以及最小转弯半径的匹配关系进行了优化。     

实现快速调整某转向前桥转向角

转向前桥在汽车上一个非常重要的功能就是实现汽车转向,而转向角是决定转向前桥性能的一个非常重要的参数,本文解决了在桥总成装配线快速调整某转向前桥转向角问题。     

基于hyperworks的前桥有限元分析

汽车前桥工字梁是汽车中的重要部件，应具有足够的强度和刚度。首先按照厂家所提供的AUTOCAD图纸在UG中建立桥壳几何模型，然后在Hyperworks软件中进行网络划分，并进行加载和约束，完成有限元计算分析。     

Generalised multi-axle vehicle handling

The familiar two-axle bicycle model and associated basic concepts of vehicle handling are reviewed and used to introduce minor changes in convention from the literature. The two-axle model is extended to a three-axle vehicle to illustrate the effectiveness of the notation combined with a simplifying mathematical identity found in the two-axle vehicle literature. A generalised model is then developed that produces dynamic equations of motion by inspection for a vehicle with an arbitrary number of steerable and non-steerable axles. Furthermore, the vehicle dynamic concepts of understeer and wheelbase are generalised and can be directly computed for various arbitrary vehicle configurations.     

内侧轴箱式转向架曲线通过性能研究

内侧轴箱式转向架是一种新型结构模式的转向架。文章通过动力学仿真软件对该结构转向架的曲线通过性能进行了计算,并在与传统转向架动力学性能对比的基础上,进一步研究了内侧轴箱式转向架的曲线通过性能。     

机车车轴疲劳问题分析与对策

通过对机车车轴常见故障及车轴的疲劳问题进行探讨,对车轴的疲劳裂纹、疲劳强度进行分析,提出了在机车车轴设计,材料、工艺选择以及运用维护中应采取的对策。