查询词典 boom hoist

Under the condition of retaining the same machine weight of wheel crane, reducing the weight of telescopic hoist boom is one of effective ways to increase hoisting performance.

轮式起重机在产品自身重量相同的情况下，减轻伸缩起重臂的重量是提高起重性能参数最有效的方法之一。

In order to meet the demands of high load and high lift height of product development trend, under the precondition to minimize hoist boom weight, what kind of sectional shape shoul...

为满足产品向大起重量和高起升高度方向发展的需要，在尽可能降低起重臂重量的前提下，采用何种截面形式，才能将失稳减小到满足设计要求的最小程度，是设计者要解决的重要问题。

In order to meet the demands of high load and high lift height of product development trend, under the precondition to minimize hoist boom weight, what kind of sectional shape should be adopted to minimize the instability, is a critical problem the designer should solve.

为满足产品向大起重量和高起升高度方向发展的需要，在尽可能降低起重臂重量的前提下，采用何种截面形式，才能将失稳减小到满足设计要求的最小程度，是设计者要解决的重要问题。

Results show that digital simulation with the method features rapid model establishment, significant reduction of node and unit numbers, low calculation cost and accurate results. At the same time, defect that the stress distribution on composing plate and reinforced plate of the hoist boom can be reflected in finite element model by this method is pointed out All these provides valuable reference for the design and manufacture of hoist booms.

结果表明：用此方法进行数值模拟，建模速度快，节点及单元数大大减少，节约了计算成本，结果准确；同时指出这种方法建立有限元模型不能反映吊臂组成板和加强板应力分布的缺点，可为吊臂的设计制造提供有价值的参考。

New progresses in finite element analysis for telescopic box section hoist boom of truck cranes are summarized. Merits and defects of existing finite element methods arc analyzed.

总结汽车起重机箱形伸缩式吊臂有限元分析国内新进展，分析现有的有限元方法优缺点。

Aiming at the problem of buckling stability capability of box section hoist boom of wheel crane, a complete section of hoist boom is taken as analysis object and buckling instability of the webs is analyzed and researched with the booms of different sectional shapes by applying finite element analysis method. Compared with crane design code (GB3811-83), one piece of plate is taken to calculate buckling stability, the method is easier and more accurate and calculation and analysis of complicated sectional shapes are easy to conduct.

针对轮式起重机箱型起重臂的抗屈曲失稳能力问题，采用有限元分析方法，取起重臂截面半波长段作为分析对象，对相同工况不同截面形状的起重臂的屈曲失稳情况进行分析研究，相对于起重机设计规范(GB3811-83)给出的取一块板进行屈曲计算要快捷、准确得多，而且也容易完成对复杂形状截面的计算分析。

Hoist boom section ; Finite element ; Anti-buckling-instability

起重臂截面；有限元；抗屈曲失稳

According to practical work condition, section of a three segment hoist boom is self-determined with SECWRITE commands, then a finite element model is directly established in ANSYS environment with ANSYS finite element analysis software. Using Beam44 beam unit and node degree of freedom coupling technique to simulate connecting between each boom section and conduct finite element analysis, calculated result of stress deformation for the boom is obtained. The result from digital simulation is in relative coincidence with theoretical analytic result and the nonlinear decline occurrence in boom bending moment curve is explained.

以ANSYS有限元分析软件为工具，按吊臂实际工况，运用SECWRITE命令自定义三节吊臂截面直接在ANSYS环境下创建有限元模型，使用Beam44梁单元和节点自由度耦合技术模拟各节臂的连接，进行有限元分析，得到吊臂应力变形数值计算结果，数值模拟所得结果与理论解析解相吻合，解释吊臂弯矩图出现非线性下降的原因。

"Derrick:a machine for hoist ing and moving heavy objects, consisting of a movable boom equipped with cables and pulleys and connected to the base of an upright stationary beam."

悬臂起重机：提升和移动重物的机器，它由一个带有缆绳和滑轮的可移动的、并与一根由向上静止横梁的底座连接的起重杆组成。

Hoist, trolley and boom main motors , as well as hydraulic systems , should be greasable as described above .

提升电机、台车电机和主电机及液压系统，应如上所述来润滑。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。