DGM-NG型船用管路通舱耐火密封装置的研制和应用

介绍了一种新型舰船用管路通舱装置的研制、试验过程、特点及其应用情况,对该装置进行了多达21项试验,表明其耐火性能和密封性能指标均达到国际先进水平,具有良好的应用价值。     

气压传动在五轴加工中心机房的应用

介绍了气压传动在工程上的一种设计应用——五轴联动数控加工中心机房房顶可自动启闭装置,并对其气动原理和机械结构给予了详细阐述。     

舰船电力推进特性仿真试验系统研究

为了能在实验室条件下考核电力船舶的推进电机,本文提出了一种新型的试验系统,以三相异步电机作为推进电机和模拟电机,利用模拟电机模拟实施的负载特性,进行考核.对其原理进行了研究,并利用MATLAB进行仿真,最后构建试验系统,结果表明试验系统能够模拟实际负载特性,达到了对电力船舶的推进系统考核的目的.     

VISSIM在世博高强度客流设施服务水平分析中的应用

高强度客流设施的服务水平评价是2010年上海世博会需要解决的核心问题之一.目前在这方面缺乏相应的理论和技术支撑.提出通过动态模拟出入口广场人群流动的方法来评估入口设施的服务水平.利用VISSIM仿真技术具有的直观、准确、灵活、可重复试验的特点,进行集散设施抽象建模、进出闸机的关键参数校核和集散广场访客行为的模拟.以上南路入口广场客流集散为研究背景,对该入口未来高峰时段的客流进行了模拟,取得了较好的仿真效果.VISSIM仿真模型可满足客流集散仿真的需求.     

新型铝电解开关主回路运动特性仿真

应用ADAMS软件对铝电解短路块驱动装置运动进行仿真,与样机试验结果相符,为该装置在铝电解行业的应用奠定了基础。     

Simulation of city bus performance based on actual urban driving cycle in China

This paper establishes the simulation model of a city bus on the basis of the EQ6110 bus prototype and its experimental data. According to the actual urban driving cycle, the fuel economy and the traction performance of the EQ6110 city bus have been simulated, and factors such as the driving cycle, the loss of power to engine accessories, the gear-shifting strategy, the fuel shut-off strategy of the engine, etc., which influence on the bus’s fuel economy, are also quantitatively analyzed. Some conclusions are drawn as follows: (1) driving cycles have a great influence on the fuel economy of a city bus; (2) under the typical urban driving cycle of the public bus in China, the engine fuel shut-off strategy can save about 1 to 1.5 percent of the fuel consumption; and (3) the optimized gear-shifting rules can save 6.7 percent of the fuel consumption. Experimental results verify that the fuel economy for the EQ6110 public bus is improved by 7.2 pecent over the actual Wuhan urban driving cycle of the current public bus in China.     

轻型两栖汽车可升降底盘机构设计与控制方案仿真

为实现某轻型两栖汽车在不切断驱动力的前提下底盘可升降和车轮可提升,采用了平衡肘肘内动力传动技术。利用无刷直流电机带动蜗轮蜗杆副,驱动平衡肘旋转,通过控制平衡肘的位置实现底盘高度可调和车轮的提升;而发动机驱动力通过平衡肘肘内的链条传动传至车轮。采用数字PID控制方法,实现了平衡肘的位置控制。借助Matlab／Simulink对执行机构进行了仿真,仿真结果表明,利用无刷直流电机驱动能够实现平衡肘的快速转动,进而实现底盘的升降和车轮的提升。     

双侧壁导坑施工数值模拟

针对隧道洞口浅埋段双侧壁导坑施工工艺的特点,对某高速公路隧道进行了数值模拟,定性地分析了双侧壁导坑开挖法施工力学行为.研究表明,在开挖初期,临时钢架与核心土共同作用形成一个承载整体,能有效地减少地表沉降变形;上部核心土开挖后,临时钢架与初衬连接处出现应力集中现象,在开挖过程中应引起重视.     

Simulation and analysis of flexible solar panels’ deployment and locking processes

To predict the attitude of satellite during the whole deployment process and evaluate the lockingimpact, a numerical flexible model of a certain satellite associated with four flexible honeycomb solar panelswas established. The flexible solar panel was modeled by the finite element analysis (FEA), and the motionequations were derived by Lagrangian formulation. The locking process was based on the method of Hertziancontact, which enables one to predict the locking impact on the satellite and the subsequent oscillation of solarpanels. The results reveal that locking operation has great impact on the attitude of the satelhte, and theangular acceleration of satellite reaches 22.03 °/s2 at the locking moment; the flexible solar panels model isfeasible to predict the accurate response of the satelhte during deployment and the oscillation of solar panels;the instantly impulsive force occurred during locking process is about 1.5 kN and the changing time is nearly0.32 s. It provides an effective approach to present the flexible solar panels' deployment process and evaluatethe locking impact.     

Multi-try counter-meshing gears discrimination device based on MEMS technology

A multi-try counter-meshing gears (CMG) discrimination device based on micro electromechani-cal system (MEMS) technology was designed for some specified information fields. The discrimination deviceconsists of two groups of metal CMG, two pawl/ratchet mechanisms, two driving micromotors and two re-setting micromotors, which make the CMG withdraw by raising the pawls. The energy-coupling element isa photoelectric sensor with a circular plate which is notched. Micromotor is fabricated using the ultravioletLiGA (UV-LiGA) fabrication process and precision mechanical engineering. The discrimination device has thefunction which can automatically reset, with the correct resetting code, it can be tried another times.