客车表面色彩设计的几个问题

本文对客车表面色彩的设计，从实用要求，经济价值，科学规律，色彩功能。     

EDGE技术在GSM-R中的应用研究

EDGE技术作为GPRS到3G的过渡性技术方案,在传输延时、速率及吞吐量等方面均优于GPRS。在GSM-R网络引入EDGE不需要改变GSM-R网络结构、无线覆盖和频率规划,通过对BTS、BSC和PCU等设备的升级即可实现。分析EDGE的调制、链路质量控制等技术特点,研究了引入EDGE对GSM-R网络的影响。     

公路防护工程常见质量缺陷及其防治

指出防护工程常见质量病害的表现形式,对其形成原因进行了分析,并提出了技术上和管理上的防治措施.     

舱口盖强度计算方法

在某集装箱舱口盖结构强度的有限元计算中，对舱口盖周围水平限位器和支撑块处的约束以及顶部压紧器处的关联程度进行了模拟，分别讨论了在垂向设计载荷的情况下，水平限位器、支撑块处的不同约束以及顶部压紧器的不同关联程度对舱口盖应力分布的影响，得出更符合实际情况的舱口盖结构强度计算方法。     

Elasto-plastic modeling of soft soil considering degradation of stiffness

The stiffness has a large influence on the behavior of soils. Its value is affected by some of the soils properties, such as the over consolidated ratio(OCR), the effective normal stress, and the plasticity index etc. In this paper, the numerical modeling of soft soils was carried out using an improved elasto-plastic S-clay1 model accounting for degradation of stiffness. The relation between the stiffness and the shear strain was established based on a large number of experimental data. The effects of strain-dependent stiffness of normally consolidated soils and over consolidated soils on the stress-strain behavior were studied through a comparison of the simulations with the experimental results of undrained triaxial compression tests. The results show that the behaviors of soils can be well predicted with the improved constitutive model, particularly before the peak stress.     

基于Ansys的矩形加筋平盖封头强度评定

将有限元方法与分析设计相结合,利用有限元分析软件Ansys对一种矩形加筋平盖封头进行强度评定。本文首先介绍瓶盖封头结构的改进。然后建立有限元模型,并进行应力求解。结果表明,此加筋平盖封头满足强度要求,与普通平盖封头相比,减小了平盖的厚度,降低了结构总重量,对平盖封头的结构改进设计具有一定指导作用。