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portal cranes
相关语句
  门式起重机
     The Test and Analysis of the Metal Structure of 冂 Type Trussed Portal Cranes
     对冂型桁架门式起重机金属结构的检测与分析
短句来源
     By reinforcing some parts of the main girders of C type of portal cranes, which work over their lifecycles, the mechanical conditions of the main girders and the elastic sag of cantilever were both improved, and their service lives were extended.
     通过对超期服役的C型门式起重机进行主梁局部加固,改善了主梁的受力状况与悬臂端的弹性下挠,延长了起重机使用寿命。
短句来源
  门座起重机
     HYBRID NEURAL NETWORKS BASED PORTAL CRANES' LUFFING SYSTEM OPTIMAL DESIGN
     基于混合神经网络的门座起重机变幅机构参数优化设计
短句来源
     A batch of 40t portal cranes imported from the Finnish company KONE are port facilities of new design.
     我国从芬兰KONE公司引进的一批40t门座起重机,系新颖的港口设备。
短句来源
     This paper presents overall structure,technical performance,main mechanisms and electric controls of typical portal cranes sucn as the MQ40/26 and MQ16/25.It offers a reference for development and use of the same kind of cranes.
     主要介绍MQ4 0 /2 6低架型、MQl6 /2 5发展型等新型门座起重机的总体结构、技术性能、机构与电气控制系统的特点 ,这些起重机具有典型代表性 ,对同类机型的产品开发和使用有一定的参考价值。
短句来源
     The system has been used in the design of three light duty portal cranes with different lifting capacity.
     本系统已用于三个不同吨位小型门座起重机的设计。
短句来源
     Traditional portal cranes' luffing system design process generally includes employing case-based reasoning method for reasonable initial parameters, and then optimizing them to get the optimal results.
     门座起重机变幅机构优化设计通常采用基于实例推理的方法确定优化设计初始参数,然后再对初始参数进行优化,得出最后的优化设计参数。
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  “portal cranes”译为未确定词的双语例句
     Main Fault Analysis of Portal Cranes
     门机主要故障分析
短句来源
     This would be useful on the design of portal cranes.
     这将为门座式起重机的合理、精确设计,提供有益的参考。
短句来源
     Analysis on Application of Index System of Structural Safety Assessment to Portal Cranes
     门机结构安全性评价指标体系的应用分析
短句来源
     Portal Cranes are the main handling facilities of the port production and the technological state of their performance affect the production efficiency and economic benefits of the port directly.
     港口门座起重机是港口生产作业的主要装卸设备,其运行技术状态的好坏直接影响着港口的生产效率和经济效益。
短句来源
     On the Protective Earthing of Gantry and Portal Cranes
     桥式和门式起重机的保护接地问题
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The four-bar combination jib is one of the most commonly used forms of the derricking mechanism for portal cranes.Usually the graphical or algebraic methods are used in the design of such jibs.The displacement matrix method discussed in this paper is a CAD method for the jib design.It is based on the comprehensive application of the kinematic equations-geometric restraint equations-and the displacement matrixes.The advantage of the method is that a number of design parameters can be chosen freely while...

The four-bar combination jib is one of the most commonly used forms of the derricking mechanism for portal cranes.Usually the graphical or algebraic methods are used in the design of such jibs.The displacement matrix method discussed in this paper is a CAD method for the jib design.It is based on the comprehensive application of the kinematic equations-geometric restraint equations-and the displacement matrixes.The advantage of the method is that a number of design parameters can be chosen freely while the design formulas and processes call for few change, so that most of the programs can be written as general routines and the computer language becomes simple. What is discussed in the paper is also applicable to the analysis and synthesis of common mechanisms, including spatial mechanisms.

四连杆组合臂架是门座起重机最常用的变幅机构形式之一。组合臂架的设计通常采用作图法和一般代数法。本文所述的位移矩阵法是运动方程——几何约束方程与位移矩阵的综合运用。它不仅可用于臂架的综合,也可用于臂架的分析,在设计过程中有一定数量的自由未知量可供设计者任意选择,而设计公式基本不变。因而可将设计过程中极大部分不变部分作为外部过程存库调用,故计算机语言简单明了,便于设计使用。本文所述内容也适用于一般机构的综合与分析,包括空间机构。

A new method of calculating the driving power of portal crane luffing mechanism is introduced in this paper. Compared with the traditional method, the new one is clear in physical conception, simple in expression, accurate in calculation, and convenient for computer operation as for optimum design.The paper first describes the general principle of rotating power to instantaneous center of velocity and then calculates tile loading moment of luffing mechanisms of different structural types used in our country...

A new method of calculating the driving power of portal crane luffing mechanism is introduced in this paper. Compared with the traditional method, the new one is clear in physical conception, simple in expression, accurate in calculation, and convenient for computer operation as for optimum design.The paper first describes the general principle of rotating power to instantaneous center of velocity and then calculates tile loading moment of luffing mechanisms of different structural types used in our country at present. Based on the above, a list is given of different equations for calculating the loading moment using the two methods.

本文介绍了一种计算门座起重机变幅机构驱动功率的新方法一瞬心回转功率法。与传统的方法相比,该法物理概念清楚,表达式简单明了,计算结果精确,便于电算和优化设计。本文先简介瞬心回转功率法的原理,接着运用瞬心功率法计算了国内目前具有的不同结构形式变幅机构的载荷力矩。在此基础上,根据两种不同的方法列出了计算各种载荷力矩的公式。

Gantry crane, loading/unloading bridge, portal crane and tower crane are big lifting appliances with large windward area, usually working in open air and subject to wind lead. In erder to prevent these cranes from moving or turn over under wind, reliable antislip devices must be equipped. Accidents, due to improper design or functioning of these devices, cranes are pushed by strong wind to move and turn over at the ends of runways, are not very rare. This paper introduces some applicable...

Gantry crane, loading/unloading bridge, portal crane and tower crane are big lifting appliances with large windward area, usually working in open air and subject to wind lead. In erder to prevent these cranes from moving or turn over under wind, reliable antislip devices must be equipped. Accidents, due to improper design or functioning of these devices, cranes are pushed by strong wind to move and turn over at the ends of runways, are not very rare. This paper introduces some applicable designs of such anti-slip devices.

门式起重机、装卸桥、门座起重机和塔式起重机等大型设备一般都在露天工作,迎风面积大,承受较大的风载荷。为了防止被大风吹动或吹倒,这些设备必须装设可靠的防风抗滑装置。由于防风抗滑装置设计不当或动作失灵,造成起重机被大风吹动,在轨道尽头受阻翻倒的事故为数不少。本文介绍各种可供选用的防风抗滑装置的构造特点。

 
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