查询词典 ultrasonic

The results show that the fatigue life of the peened joint is 20～30 times as long as the as-welded joints .Therefore,the improvement of the fatigue strength of welded joints by ultrasonic peening is remarkable.

试验结果表明：超声冲击方法对焊接接头疲劳强度的改善效果十分明显，能够提高疲劳寿命20～30倍以上，极具实用价值。

Test results show 1 the fatigue strength of peened joints under overloading, in spite of lower than the fatigue strength of the non-overloading peened joints, is still greatly higher than the fatigue strength of as-welded joints; 2 In the range of lower stress level and longer life, ultrasonic peening method exhibit better results than TIG dressing; 3 Fatigue strength of the welded joints with defects (such as undercut at the weld toe) can also be improved greatly after peening treatment.

结果表明，超声冲击处理过的焊接接头经过载后疲劳性能有所下降，但与原始焊态相比提高疲劳强度、延长疲劳寿命的效果仍然十分显著；在低中应力水平、中长寿命区域，使用超声冲击法提高焊接接头疲劳强度比TIG熔修法效果更好；超声冲击处理后，含咬边等缺陷的焊接接头，疲劳强度同样有较大的提高。

In this paper,a ultrasonic peening device based on piezoelectric ceramic transducer is firstly developed successfully.

本文研制成功了一种基于压电陶瓷换能器的新型超声冲击试验装置。

The results show that the instrument can reach the demand of ultrasonic peening grain refinement.

试验结果表明该设备可以满足超声表面晶粒细化冲击的要求。

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。

Ultrasonic peening device is first studied successfully in China.

首次建立了压电式超声冲击实验装置的试制方案。

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。

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。

Chapter two introduces the concept of entropy in information theory, maximum entropy principle, and minimum cross-entropy principle.

第二章首先介绍了信息论中的熵、最大熵原理、最小叉熵原理。

While Yaolin was at swimming practice, Timmy and I visited the Franklin Park Conservatory to take our picture in the Palm House where we were married.

当Yaolin在游泳的运作时， Timmy和我在我们结婚的温室里访问富兰克林公园音乐学院拍我们的照片。