“高架滑触线方案”RTG油改电项目中的索塔分析

本文结合上港集团实际工程,介绍了采用高架线路滑触供电的方式,完成港口集装箱码头堆场内轮胎式集装箱起重机(简称RTG)油改电工程中的索塔分析过程。     

起重运输机械应用无线遥控技术的研究与实践

从起得运输机械实现无线遥控的实际需要出发，介绍了德国HBC公司FST系列无线遥控系统的组成和特点，并用实例说明了起重机无线遥控系统的设计方法。     

塔式起重机附着装置的计算机辅助设计

阐述了塔式起重机附着装置的设计计算理论，建立了基于该理论的塔机附着装置计算机辅助设计系统。该系统能够快速准确地设计出符合实际情况的附着装置，同时自动完成施工图的绘制，并自动生成设计计算说明书和物料清单表，大大提高了工作效率。     

起重机机械松闸装置的设计和应用

介绍了起重机机械的一种松闸装置,其布置在起升机构的上滑轮装置与高速轴液压推杆制动器之间;当起升载荷接近100％时（可调节）,利用上滑轮装置受载下压的力量驱动机构动作,实现制动器松闸,达到保护起升机构的作用。该装置无需外加动力,无需人工干预,可靠性高,易于调节,实现了对起重机的保护。     

铝热焊接技术在冶金行车轨道上的应用探讨

通过对钢轨铝热焊接的原理介绍，阐明了冶金行业中使用无缝行车轨道后，行车运行平稳无冲击，且焊接时间短，该技术优势将会大量运用在冶金行业轨道上。     

Cuckoo search algorithm with membrane communication mechanism for modeling overhead crane systems using RBF neural networks

Developing a precise dynamic model is a critical step in the design and analysis of the overhead crane system. To achieve this objective, we present a novel radial basis function neural network (RBF-NN) modeling method. One challenge for the RBF-NN modeling method is how to determine the RBF-NN parameters reasonably. Although gradient method is widely used to optimize the parameters, it may converge slowly and may not achieve the optimal purpose. Therefore, we propose the cuckoo search algorithm with membrane communication mechanism (mCS) to optimize RBF-NN parameters. In mCS, the membrane communication mechanism is employed to maintain the population diversity and a chaotic local search strategy is adopted to improve the search accuracy. The performance of mCS is confirmed with some benchmark functions. And the analyses on the effect of the communication set size are carried out. Then the mCS is applied to optimize the RBF-NN models for modeling the overhead crane system. The experimental results demonstrate the efficiency and effectiveness of mCS through comparing with that of the standard cuckoo search algorithm (CS) and the gradient method.     

Are Stacker Crane Problems easy? A statistical study

Many full truckload pick-up and delivery problems in the intermodal freight container transport industry can be modeled as Asymmetric Traveling Salesman Problems (ATSPs). Several authors have noted that while ATSPs are NP-hard, some instances are readily solved to optimality in only a short amount of time. Furthermore, the literature contains several references to the Stacker Crane Problem (SCP) as an “easy” problem amidst the ATSPs. We put this hypothesis to test by using statistical methods to build a model relating measurable distance matrix structures to the amount of time required by two existing exact solvers in finding solutions to over 500 ATSP instances. From this analysis we conclude that SCPs are not necessarily easier than other ATSPs, but a special subset of SCPs, termed drayage problems, are more readily solved. We speculate that drayage problems are “easy” because of a comparatively high number of zeros in symmetric locations within the distance matrix. In real-world drayage problems (i.e. the movement of containers a short distance to/from a port or rail terminal), these zeros correspond to the prevalence of jobs originating at or destined to a fixed number of freight terminals.     

桥式堆垛机大车运行机构的技术改造

分析了某厂仓库 1台 1 5t桥式堆垛机大车运行机构的结构、特点、存在的问题 ,并参考桥式起重机大车运行机构对其进行技术改造     

基于改进蚁群算法的桥式起重机路径规划问题研究

通过研究桥式起重机路径规划问题,提出一种改进的蚁群路径规划算法.针对传统蚁群算法收敛速度慢,容易陷入局部最优的缺点,借鉴A*算法和狼群分配原则改进自适应启发函数、信息素更新机制.根据桥式起重机的运行特征,通过运动学动力学分析抽象出两个仿真因子:路径长度和节点数量,提出以路径长度、运行时间和稳定性等性能参数为代价的新的评...     

桅杆起重机的转台和臂架有限元分析

对桅杆起重机的转台及臂架在起升载荷下的受力情况进行了分析和计算,利用Ansys有限元软件对起重机的结构进行了静力计算,得到了结构的应力分布,并对应力分布结果进行分析,提出改进意见。