本论文写的是臂架型的。
进行了箱形臂架局部稳定性的有限元分析。
Finite element analysis of local stability of the box-sectioned boom is performed.
研究了臂架的动态特性。
这种技术为泵车臂架的结构监测提供了可能。
This kind of technology makes it possible to monitor the pumps structure.
检测设备：油压扭力测试仪、转速仪、旋臂架。
Testing equipment: hydraulic torque tester, speed device, spin Boom.
单臂架门座式起重机结构简单、起重量大自重轻。
Simple arm frame gantry crane structure, lifting large light weight.
它作为臂架型起重机械的安全保护装置具有一系列优点。
It provides a series of advantages for use as a safety device of boom type cranes.
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。
The four-bar combination jib is one of the most commonly used forms of the derricking mechanism for portal cranes.
钢结构构造简单，主要有臂架、人字架、回转平台以及门架组成。
Steel structures are jib and A-frame, slewing platform and gantry frame.
然后详细的介绍了泵车的基本组成及臂架系统的结构特点和机构特性。
Secondly, the constitution of the truck mounted concrete pump and the structural traits and machine characteristics of the boom system were introduced in detail.
上装组成部分：臂架系统、转台、回转机构、固定转塔、支撑支腿等。
Up-loading System: Boom system, Rotary table, Slewing mechanism, Fixed turret, Landing leg.
更重要的是可找出臂架在最佳受力工况下进行泵送，提高臂架疲劳寿命。
More importantly, the boom may find at the best conditions for pumping force, boom improve fatigue life.
但是由于桩架力学模型的支承条件与起重机臂架不同，故桩架显得笨重。
However, pile drivers are too bulky since the bearing condition of the mechanical model of pile drivers is different from that of crane jibs.
本文以管形变截面臂架为例，证明用能量法求臂架的屈曲载荷相当准确。
Present paper takes a tubular boom as an example to prove that it is precise enough to use energy method to find buckling load of a boom.
所述拉紧装置能够顺利地实现臂架的变幅，并能够有效减轻臂架的挠度；
The tension device can smoothly realize amplitude of variation of the crane jib and effectively relieve the deflection of the crane jib.
清洗系统：大功率清洗水泵，能迅速、方便地对臂架砼配管及料斗进行清洗。
Cleaning system: cleaning pump with great power can clean the concrete piping of crane and hopper swiftly and conveniently.
臂架型起重机：可在圆形场地及其上空作业，多用于露天装卸及安装等工作。
Jib crane: in circles over the operation site and more for open-air handling and installation work.
履带起重机在突然卸载时臂架后倾是整机稳定性和防后倾机构设计要考虑的工况。
The back-tipping of boom of crawler crane due to sudden unloading must be considered in design of anti-back-tipping device of crawler crane to ensure the stability of the complete crane.
目的：介绍切开复位单臂外固定架（以下简称单臂架）治疗不稳定胫骨骨折体会。
Objective:To introduce the experience of cut reduction in treating unsteady tibial fracture of unilateral axial combined internal fixator (short for unilateral axial).
因此臂架需要有一定的侧向刚度以保证其振动稳定性，即要求箱型截面形状设计合理。
Therefore need to have a certain arm lateral stiffness to ensure stability of the vibration, which would require the box shape of the design of a reasonable cross-section.
应用该软件分析了起重机臂架的稳定性及其极限载荷，分析结果验证了本文所提方法的有效性。
The bucking analysis of actual crane boom is done using this software, and the results of analysis verify the correctness and effectiveness of the methods in this paper.
对大型斗轮挖掘机臂架，通过考虑局部动力效应，推导了在地震荷载作用下结构单元的修正公式。
The modified formula for the boom of large complicated bucket wheel excavator has been put forward under earthquake, included the local dynamic effect.
四连杆门座式起重机采用最佳优化的组合臂架系统，具有水平落差小、变幅平稳、功耗低的特点。
Four-link portal crane using the best combination of optimized boom system, with horizontal small gap, amplitude stable, low power consumption.
通常臂架自振频率的计算多关注于工作平面，而对垂直于工作平面的臂架自振频率的计算则被忽视。
The existing calculations for free frequency of the jib involve the vibration in the working plane and the vibration in the direction perpendicular to the working plane is usually neglected.
具有变截面臂架的格构式起重机之整体稳定性分析更是目前我国起重机设计分析人员所面临的难题。
The overall stability analysis of the crane's lattice jib with main and vice-jib structure is even more difficult to technician in our country.
根据计算结果调整参数修改臂架设计模型，实现臂架三维设计与结构分析实时交互更新，快速响应。
According to the calculation result, adjust the parameters to modify the boom model, to realize 3d design and structure analysis mutual updating and quick response.
臂架式起重机常采用变截面的臂架，臂架的自重、结构型式与主要尺寸对起重机的性能有重要的影响。
Boom crane often has a boom with varying cross section. Boom weight, its construction and main dimension significantly affects the crane performance.
起重机臂架系统是臂架类型起重机的重要承载部件之一，其力学特性对整机的正常运转有直接的影响。
Crane booms system is an important type of crane booms bearing parts, its mechanical properties of the normal operation of machine has direct influence.
起重机臂架系统是臂架类型起重机的重要承载部件之一，其力学特性对整机的正常运转有直接的影响。
Crane booms system is an important type of crane booms bearing parts, its mechanical properties of the normal operation of machine has direct influence.
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