分为桁架式和圆筒式两种门架型式。
Two types of portal cranes: truss type and cylinder type, are available.
本文概要介绍了多级门架的设计。
本文对山形门架中常用的构件—楔形变截面构件进行了研究和分析。
This paper gives researches and analyses on the tapered members which are widely used in gable portal frame.
应用所编制的程序，进行了平板、曲壳以及板式门架的双重非线性屈曲分析。
Using the correlative program, buckling analysis was made with plates, shells and portal frame made of plates.
门架结构工程计算和动态分析中均需求解和应用门架任意点的位移，但目前尚缺乏这种位移公式。
Arbilrary particle displacement is required to be solved and applied in engineering calculation and dynamic analyses for gantry structure, but formula of this kind is still lacking at present.
将有限元法应用于门架的设计过程，可以大大减少设计工作量，提高设计的效率。
Applying the finite element analysis method to the design of Hydraulic Gate Hoist structure will furthest shorten the period of design, and improve efficiency.
研究了A型门架基座及加强结构的外载荷，采用有限元法计算了结构在各载荷组合工况下的应力。
The external loads on the A-type gate crane foundation and its reinforcement structure are studied.
将ANSYS的二次开发语言APDL与VC相结合，开发门式启闭机门架结构的参数化有限元分析系统。
Combining APDL in ANSYS with VC, the parameterized finite element analysis system of the hydraulic gate hoist structure is developed.
通过将该系统应用于某工程实例，并将该实例的理论计算门架静刚度值与有限元分析值进行比较，验证了该系统的可行性和计算结果的可参考性。
The feasibility and the credibility of this system are proved, by using this system to a case and comparing the finite element analysis results and the theoretical results of the case.
通过优化门型架结构中各构件的截面尺寸，在满足强度要求的条件下达到了减轻结构重量的目的。
By optimizing the cross section sizes of the portal framed structure component, the weight of the portal framed structure had been decreased when it meets the requirement of strength.
根据施工具体情况，选用了门式架支撑体系。
According to the special construction conditions, portal-frame supporting system is adopted in the project.
针对我国港口和电厂煤码头多次门机主臂架折断事故，从现象分析入手，确定其均为局部失稳而引起整体破坏。
The analysis made in the paper shows that many accidents on the portal cranes furnished to the harbours and power plant coal wharfs in China are caused by the buckling in their main jibs.
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.
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.
在飞行试验中，诺斯罗普·格鲁门公司的一架Proteus试验机和美国航天局的一架全球鹰飞行在13716米(4.5万英尺)的高空，距离接近12.2米(40英尺)，创造了行业纪录。
In a key risk reduction flight test, Northrop Grumman's Proteus test aircraft and a NASA Global Hawk flew as close as 40 feet apart at an altitude of 45,000 feet, an industry-setting record.
该系统的业务效用评估(OUE)规划在2010年初已经开始，11月17日美国空军国民警卫队开始基于诺斯罗普·格鲁门公司提供的计划和图纸改装一架KC- 135加油机。
Planning for the Operational Utility Evaluation (OUE) began in early 2010 and on Nov. 17, the Air National Guard began modifying a KC-135 based on plans and drawings provided by Northrop Grumman.
根据其关键构件的形式特点，中国古代木家具腿足可分为板足式、跗足式、立腿式、架座式、门式、托泥式等六种基本形式。
The forms and structures of ancient Chinese wooden furniture can be classified into six types: Board style, Instep style, Standing leg style, Pedestal style, Kunmen style, and Tray style.
门座式起重机分单臂架和四连杆两种类型，起重机的起升、变幅、回转和行走四大机构均采用交流变频调速，整机采用PLC控制，使用性能优越。
Portal crane sub frame and four-link arm two types, from the crane hoisting, luffing, slewing and walking four agencies ac frequency control, the machine USES PLC control, superior performance.
利用门式脚手架配上简易屋架，便可构成临时工地宿舍、仓库或工棚。
Accompanied by simple roof truss gantry scaffolding can constitute a TWA quarters, warehouse or shed.
变压器在移动过程中确保设备和人身安全。变压器运至安装位置后采用门型架、倒链就位。
Make sure the equipment safety and human safety during the move of transformer. The transformer is fixed with door fixture and chain block after being transported to installation position.
变压器在移动过程中确保设备和人身安全。变压器运至安装位置后采用门型架、倒链就位。
Make sure the equipment safety and human safety during the move of transformer. The transformer is fixed with door fixture and chain block after being transported to installation position.
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