循环模拟计算在发动机可变进气系统设计中的应用

本文介绍了发动机的可变进气系统及进、排气循环模拟在可变进气系统设计中的应用。用循环模拟作为辅助设计手段，与传统的“设计—制作—试验—再设计”方法相比，具有设计成本低，周期短的优点。     

二行程汽油机分层扫气性能的数值模拟研究

简述了二行程汽油机常用的两种分层扫气方式(空间分层和时间分层)的工作原理,并采用计算流体力学(CFD)程序对其分别采用均匀扫气和这两种分层扫气方式时的换气过程进行了多维模拟计算。计算结果表明,与均匀扫气方式相比,分层扫气方式具有燃油短路损失小的优点,但对扫气性能没有明显的影响,且燃油的混合不如均匀扫气充分。     

应用计算机模拟技术模拟分析微型客车正面碰撞

应用计算机模拟技术对某微型客车进行了正面碰撞模拟分析，得出车架部分在碰撞中的变形吸能所占比例最大，指出在设计和改进中应利用这一特色对微型客车前部结构采取加强措施，以达到正面碰撞的安全要求。     

Virtual prototype simulation on underwater hydraulic impingement shovel

The virtual prototype technology is applied to the design of the hydraulic impingement shovel, which is to increase the reliability of the design. The work principle of hydraulic impingement shovel is expatiated, and its dynamic equations are established. The 3D model of virtual prototype is built by PRO/E. Then the couple between the mechanical body of prototype and the hydraulic system is completed by virtue of ADAMS. Finally, the simulation is made on the virtual prototype. The simulation results show that the design of underwater hydraulic impingement shovel is rational. The virtual prototype technology could lay sound foundation of successful manufacturing of physical prototype for the first time and offer highly effective and feasible means for the design and production of underwater equipments.     

香港港口新建设

本文较详细地介绍了香港近几的为运用最新科学技术，大规模进行港口工程建设的情况。     

3D动画和Photoshop渲染图在隧道洞门景观设计中的应用

计算机3D动画和Photoshop渲染图在土木工程中已被广泛应用于房屋建筑，室内装饰等领域，但用于隧道洞门景观设计国内尚属少见，本文阐述了计算机3D动画和Photoshop渲染图在隧道洞门景观设计中的作用，通过；通过计算机3D动画和Photoshop渲染图在丹东本溪高速公路隧道洞门景观设计中的应用实例，具体讨论了隧道洞门景观设计中计算机模拟制作的过程。     

3车道连拱隧道施工引起围岩位移变化的数值模拟

为研究三导洞施工对大跨度3车道连拱隧道围岩位移的影响,对某高速公路3车道连拱隧道施工进行实态建模,采用可以准确模拟岩土材料塑性屈服流动的有限差分法对施工过程进行弹塑性数值模拟,得出大跨度3车道连拱隧道开挖过程中周围地层位移的发展规律。     

Convective Heat Transfer Characteristics of the Elliptic Cylinder with Axis Ratio 4：1 in Crossflow

The heat transfer features around the elliptic cylinder of axis ratio 4：1 in crossflow were investigated experimentally within a wide range of Reynolds number. By means of heat-mass transfer analogy and the naphthalene sublimation technique, the local heat transfer distribution and the mean heat transfer coefficient are clarified.The result shows that the mean heat transfer coefficient is higher than that of a circular cylinder in most Reynolds number range regarded, and this superiority turns to be more significant with the increase of flow speed. Moreover, the effect of axis ratio on mean heat transfer coefficient was investigated tentatively. The oil-lampblack technique was employed to enable visualization of the flow pattern around the cylinder and on the cylinder wall.