疲劳强度

It is a new method to increasing fatigue strength of welded joints and structure by peening welded toes with ultrasonic peening equipment.

摘 要：使用超声波冲击焊趾来提高焊接接头及结构的疲劳强度，是国际上刚刚出现的一种新方法。

The splinted shaft is made of alloy and the surface is specially treated, its abrasion performance and fatigue strength is enhanced.

花建轴采用合金材料进行特殊表面处理，提高了耐磨性及疲劳强度。

The splinted shaft is made of alloy and the surface is specially treated, its abrasion performance and fatigue strength is enhanced.

花键轴采用合金材料进行特殊表面处理，提高了耐磨性及疲劳强度。

Presently, there is only a little study about the fatigue property of steel bridge monolithic joint.

目前，对于整体节点疲劳强度的研究还很少。

In this thesis, the study method combining theory calculation with model test is adopted. Based on Chongqing Caiyuanba Yangtze Bridge, it is studied that various structure details impact on the fatigue property of steel bridge monolithic joint.

本文采用理论与试验相结合的研究方法，以正在兴建的重庆菜园坝长江大桥为背景，重点研究了各种构造细节对钢桥整体节点疲劳强度的影响。

JK4-50 car retarder ,theory and methods for improving the fatigue strength and reducing amount of maintenance work,and the situation of field application of the retarder .

JK4-50型车辆减速器的开发原则，以及提高疲劳强度和降低维修量的理论和方法，并介绍了现场实际使用情况。

Limited by technology and installment conditions,a method of increasing a few chain wheel teeth was adopted to solve problem.

在工艺安装等条件受限制的情况下，采用了少量增加链轮齿数的改进方法，既能有效提高链传动的疲劳强度可靠度，又基本保持了原设计风格。

Cone crusher ; center apart ; bent tired strength ; bent use should dint

圆锥破碎机；中心距；弯曲疲劳强度；弯曲许用应力

In view of easy fusion flaw between connecting of doubler strake and deck plating or bottom plating strengthened, this paper puts forward a fire-new welding technics for the purpose to improve the technics of welding connecting of doubler strake. Under the help of this way, connecting of doubler strake can be penetratingly fillet welded, but not fuse with deck plating or bottom plating strengthened, at the same time the figure of weld surface can also be managed for increasing fatigue strength of connecting.

本文针对复板条对接接头容易和被加强的甲板或船底板发生粘连的缺点，从改善复板条对接接头的工艺入手，提出了新的焊接工艺，使得复板条对接接头既能保证完全焊透，又不会和被加强的甲板或船底板发生粘连，同时对焊缝表面形状进行处理，以提高接头的疲劳强度。

Presently, the reading work of the dial indicator in our country still adopts the manual method. This method is restricted by such subjective factors as observing angel and distance as well as fatigue strength and so on, which results in not only large error and low reliability but also low efficiency and great labor costs.

目前国内对这类仪表的判读工作主要是采用人工观测仪表表盘指针来读数的方法，这种方法受人的主观因素如人的观测角度、观测距离及疲劳强度等的影响，误差较大，可靠性不高，且工作效率低，劳动强度大。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。