疲劳强度

Besides,localized decarburation of leaf spring also spoiled its fatigue strength.

另外，弹簧表面局部区域存在脱碳，降低了材料的疲劳强度。

The unified fatigue formular of considering the effect of temperature is derived.

研究了温度对砼抗拉疲劳强度、刚度、变形影响的规律，建立了考虑温度影响的S-N关系。

In view of this, the tranditional fatigue strength condition under nonsymmetrical circulation is incorrect.

由此可知，当前通用的非对称交变应力的疲劳强度条件是不正确的。

The analysis indicates that the structure of oil hole passing throu...

进行的疲劳强度试验验证结果表明：通过对轴颈圆角半径等局部结构参数的合理选择，可以提高曲轴可靠性。

There are three factors resulting in the improvement of the fatigue strength of peened joints.

本文对超声冲击处理提高焊接接头及结构疲劳强度的机理进行了全面的研究。

An investigation in details is conducted on factor which influence on the peened affection.

在各种焊接结构实际制造和使用过程中常有一些问题，可能对超声冲击法提高焊接接头疲劳强度的效果有较大的影响。

ABSTRACT Ultrasonic peening technique is studied for improving the fatigue strength of the welded joints and structures.

本文对改善焊接接头及结构疲劳强度的超声冲击处理技术进行了全面研究。

For evaluating the ultrasonic peening performance carried out by this equipment, the fatigue tests is performed.

利用所研制的压电式超声波冲击实验装置，验证了超声冲击法改善焊接接头疲劳强度的实际效果。

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

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。

It's a new method to increase fatigue strength of welded joints and structure by peening toe of weld 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，是一种国际上刚刚出现的新方法。

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。