中杆

The causes of breakage of round aluminum pole during continuous rolling are analyzed;the prevention measures are presented according to the characteristics of aluminum electrolyte and actual situal situation of casting equipment.

简要分析了铝杆连轧过程中发生断杆的原因，根据电解铝液的特点和浇铸设备的实际情况，提出了相应的改进预防措施。

In the unstiffened overlapped CHS joints experiment, the wall thickness of brace member in non joint zone would be increased so as to calculate axial fotceb directly by the way of elastic method.

建议在后续的搭接节点试验中，可将非节点区域的腹杆壁厚加大，以便通过弹性方法直接反算杆件轴力。

Bolt capacities and orientations are added vectorially,and are included in the Safety Factor calculation as a single, equivalent force passing through the centroid of the wedge.

锚杆锚固容许力作为通过型心的单一等效力反映在安全系数中，主动和被动的锚杆模型均能被模拟。

By analyzing the forging process of double frustums sucker rod and using rigid visco-plastic material model and 3-D coupled FE simulation, the whole forging procedure are analyzed and simulated with finite element analysis software DEFORM. The results indicate the inner stress field, strain field, metal flowing law and forging travel-load curve during the forming procedure. The forming statuses, causation of defect of workpiece are predicted and so on.

通过对抽油杆镦锻工艺的分析，并采用刚粘塑性材料模型与有限元耦合的方法，运用有限元分析软件DEFORM-3D对双圆台抽油杆的成形过程进行了模拟，获得了成形过程中的内部应力、应变、金属流动规律及行程――载荷曲线，预测分析了工件成形状况、可能产生的主要缺陷的形式、部位和原因。

Characteristics of wave propagation in grouted rockbolt were investigated with numerical simulation, experimental measurement and theoretical analysis.

用理论分析、数值模拟和实验测试的方法研究了自由锚杆和锚固锚杆中的波传播特性。

The fracture analysis includes the macro-fractography and micro-fractography, the experimental analysis of the chemical components, the mechanical properties, and the metallography of drill pipes, and the stress conditions analysis of drill pipes in air drilling.

失效分析内容主要包括断口宏观分析和微观分析，钻杆材料化学成分、力学性能和金相组织试验分析，钻杆在空气钻井过程中受力条件分析等。

Using AutoCAD software to simulate the relative position change between balance beam and crane arm during hoisting course can offer accurate relative angles between the balance beam and the crane arm and provide in-site guidance to implement hoi.

通过使用 AutoCAD软件模拟吊装过程中平衡梁和吊车臂杆相对位置的变化情况，可以精确地给出平衡梁和吊车臂杆的相对角度，指导现场吊装作业的实施。

And there are many sorts in the does not impose restriction double lever ball that exists on ball catch field up to now or much lever ball is extremely inequitable, those who have negativity and limitation, hold the post of its to develop

而至今门球场上存在的不加限制的双杆球或多杆球中有不少种类是极其不公平、有消极性和局限性的，任其发展

"They all have a string -bearing neck that projects through a small resonator and a bow, the hair of which passed between the two string s."

这些胡琴都有琴杆，上有琴弦，琴杆从一小共鸣箱及弓中伸出，弓毛穿过两弦之间。

This paper introduced the mechanism of vibration in the process of deep hole boring ,developed a dynamic modal of the damping boring bar,optimizing the parameters of the damping system,analyzed the transient dynamic and harmonic response of the damping boring bar.

介绍了深孔镗削加工过程中产生振颤的机理，建立了减振镗杆的动力学模型，在此基础上优化减振系统的参数，并且对减振镗杆进行瞬态动力学和谐响应分析，分析结果表明该减振系统具有良好的减振性能。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐