查询词典 boom

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。

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

起重臂截面；有限元；抗屈曲失稳

If a country boasts a large population of talents who receive systematic and comprehensive tertiary education and a wealth of enterprises where those elites can transform their expertise into competitive products , this economy will experience long-term economic boom and successfully iron out headaches , such as widespread unemployment and poverty .

如果一个国家拥有了大量的人口（这些人口接受了系统和全面的高等教育）并且有大量的企业（在那里人才可能将他们的知识转化为实际的有竞争力的产品），那么这个国家将会经历长期的蓬勃发展并且成功地解决失业问题和贫困问题。

Bend a mainsail onto the boom .

二是增大尾桨尺寸，这涉及到加长尾撑，否则尾桨和主桨要打架，。。。

Whose bucket is rigidly attached to a hinged pole on the boom and is drawn backward to the machine when in operation.

反铲挖土机铲叶牢固地连在吊杆上的铰链孔中的一种挖土机，当它处于工作状态时，铲叶被向后拖向机器

An excavator whose bucket is rigidly attached to a hinged pole on the boom and is drawn backward to the machine when in operation.

反铲挖土机铲叶牢固地连在吊杆上的铰链孔中的一种挖土机，当它处于工作状态时，铲叶被向后拖向机器

The X-ray diffract was used to analyze the crystal structure of the composite. Results show that after the talc was treated with blend coupling agent, the crystal structure of talc changed, and effect Intercalation phenomenon.

通过X射线衍射分析可知，用混合偶联剂对滑石粉进行预处理后，滑石粉晶体结构发生改变，产生了插层现象，使PP／滑石粉复合材料为纳米复合材料。

An authentic Maui wedding might require the services of a 'kahu', which is a Hawaiian minister.

毛伊可能需要一个真实婚礼服务'kahu'，这是夏威夷部长。