滑模技术在桥梁高墩身施工中的应用

重点介绍在康家沟大桥施工中,高墩身采用液压滑升模板施工的过程。实践证明,滑模施工工艺的应用,不仅缩短了工期,而且为企业节约了施工成本。     

工程机械液压传动系统故障诊断与维修

从工程机械液压传动系统故障的特点入手,详细介绍工程机械中几种常用液压器件的故障诊断方法、分析和排除故障的具体措施,并提出了预防故障的建议,有助于提高机械使用寿命,发挥设备最大效益。     

复杂条件下大跨公路隧道施工中的关键技术

杭州万松岭隧道为双向四车道大跨公路隧道,断面大、结构扁平、埋深浅且工程地质和周边环境条件复杂,施工难度大。通过采取洞内地层预加固、双侧壁导坑法施工和微振爆破等关键技术,保证了工程安全顺利建成,并取得了较好的经济效益和社会效益。     

WTU75稳定土摊铺机液压系统污染防治及系统保养

针对WTU75稳定土摊铺机液压系统故障及污染问题,通过多年日常维护、修理经验总结以及资料整理,分析了WTU75型稳定土摊铺机典型液压系统故障处理方法、液压系统污染防治以及其系统保养。为广大操作维修人员提供修理保养方面的参考．使该机型在工程建设中发挥更大的作用。     

基于AMESim的搅拌运输车电液控制系统仿真

对电控混凝土搅拌运输车的液压系统进行了建模和仿真,建立了电控混凝土搅拌运输车的电液控制系统的传递函数。在此基础上,利用AMESim软件对电液控制系统进行仿真分析,并分别在进料工况、正常工况和改变斜盘角度三种工况下,对系统的仿真模型进行了验证。     

Super1800沥青混凝土摊铺机行走液压系统分析

从行走液压泵及液压马达、行走液压系统的闭式回路、液压行走变速系统、电气系统等部分对Super1800沥青混凝土摊铺机行走液压系统工作原理进行了全面分析,对此类设备的检查与维修具有参考意义。     

液力缓速器三维数值模拟及性能预测

采用标准k-ε模型和SIMPLEC算法对液力缓速器内部流场进行了数值模拟,计算结果揭示了流道内湍流流动的速度分布、压力分布和湍动能分布规律,从而分析出该型叶轮流动的特点.在流场分析与计算的基础上,提出了液力缓速器性能预测方法,对规定工况点的性能进行了预测,并分析了预测结果和试验结果差异的原因.     

城市公交网络的拓扑结构及其演化模型研究

城市公交网络的拓扑结构特性源于其内在的演化生成机制.以国内4个城市公交网络为研究对象,分别在L空间和P空间对这些网络的度分布、集聚系数和平均路径长度进行了计算和分析.研究发现,公交网络中经过站点的线路教分布服从幂律分布,节点的度分布服从指数分布.基于此,提出了公交网络的演化生成机制--线路择优连接和站点随机游走机制,并构建了公交网络的演化模型.数值仿真结果表明,模型反映了公交网络演化生成过程的关键要素.     

The brittleness model of complex system based on cellular automata

Now the research on the complex system is a hot spot. Brittleness is one of the basic characteristics of a complex system. In a complex system, after one of subsystems is struck to be collapsed, the whole system will collapse. Meanwhile, cellular automata is a discrete dynamic system. When the rule is given, the cellular automata could be defined. Then it can imitate the complex action. Cellular automata is used to simulate the brittleness action in this study. Entropy was used to analyze the action and get the rule. Then,three normal brittleness models were given. The result shows that the brittleness of complex system is existent and in addition some important behavior mode of complex system brittleness has been achieved.     

Study of hierarchical federation architecture using multi-resolution modeling

This paper aims at finding a solution to the problem aroused in complex system simulation, where a specific functional federation is coupled with other simulation systems. In other words, the communication information within the system may be received by other federates that participated in this united simulation. For the purpose of ensuring simulation system unitary character, a hierarchical federation architecture (HFA) is taken. Also considering the real situation, where federates in a complicated simulation system can be made simpler to an extent, a multi-resolution modeling (MRM) method is imported to implement the design of hierarchical federation. By utilizing the multiple resolution entity ( MRE ) modeling approach, MRE for federates are designed out. When different level training simulation is required, the appropriate MRE at corresponding layers can be called. The design method realizes the reuse feature of the simulation system and reduces simulation complexity and improves the validity of system Simulation Cost (SC). Taking submarine voyage training simulator (SVTS) for instance, a HFA for submarine is constructed in‘this paper, which approves the feasibility of studied approach.