One thing that does ground old aircraft is the impending failure of their aluminium structure from metal fatigue.
让老旧飞机搁浅的一件事就是飞机铝构造因为金属疲劳产生的故障隐患。
Than the structure details contained in integral joint are analyzed, and the fatigue property of steel bridge integral joint is evaluated.
然后分析了钢桥整体节点所包含的构造细节，评价了钢桥整体节点的疲劳性能。
The prediction of fatigue life is important for steel towers and so on, because for this type of structure wind load is regarded as the main load.
由于风荷载是钢塔架等钢结构的主要荷载，风荷载作用下上述结构的疲劳寿命预估因而是至关重要的。
The primary cause of breakage is that the dynamic stress exceeded the allowable fatigue limit of the beam, and another cause is that the structure of the beam is unreasonable.
通过计算证明引起断裂的根本原因是动应力超过了梁的许用疲劳极限，另一原因是梁的结构不合理。
This paper probes into the methods and contents of fatigue tests and fatigue design of crane's steel structure, and advances some new opinions.
文章探讨了起重机钢结构疲劳试验及疲劳设计的方法和内容，提出了新的观点。
With the popularization and application of this structure in industrial factory with suspended crane, the fatigue performance becomes the hot problem to be solved for many years in engineering circle.
随着螺栓球节点网架在悬挂吊车工业厂房中的推广应用，其疲劳性能成为工程界多年来尚待解决的热点问题。
This research contributes to fatigue design, probability analysis and life estimations for steel reinforcement concrete structure.
结论有助于钢筋混凝土结构的疲劳设计，可靠性分析和寿命估算等。
The relation between the extension of fatigue cracks and structure are discussed.
并讨论了疲劳裂纹的发生、扩展与组织的关系。
Linking Riveting Process Parameters to the Fatigue Performance of Riveted Aircraft Structure.
铆接过程参数与铆接飞机结构的疲劳性能的联系。
For weld structure fatigue life forecasting, it has important theory meanings and practical applying value.
对焊接结构疲劳寿命的预测有重要理论意义和实际应用价值。
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。
Short cracks propagation research: the degree of Microscopic structure influence to the fatigue crack propagation depends on crack length.
短裂纹扩展研究：微观组织结构对疲劳短裂纹扩展的影响程度取决于裂纹的长度。
The results indicate that EMR can improve the fatigue life of structure, and can drive interference-fit fastener with large interference.
研究结果表明，电磁铆接技术能够提高结构疲劳寿命，能够安装大干涉量干涉配合紧固件。
As base course material, porous concrete withstands the repeated action of traffic and temperature, so the fatigue property should be considered in structure design.
多孔混凝土作为路面的基层，和面层一起受到车辆荷载和温度的反复作用，结构设计中需考虑其疲劳性能。
It's a new method to increase fatigue strength of welded joints and structure by peening toe of weld 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，是一种国际上刚刚出现的新方法。
Based on the many times tests and analyses, a real time system about spot testing fatigue load spectrum of engineering structure materials was studied and developed.
在多次试验和分析的基础上，研制了一种可用于现场测试的工程结构材料疲劳载荷谱实时测定系统。
Optimization design method of welded structure was put forward with welded joint fatigue damage as constraints.
提出考虑焊接接头疲劳损伤约束的焊接结构抗疲劳优化设计方法。
By importing results from the global model, some sub-models with very fine mesh are created to do fatigue assessment of structure details.
利用整体舱段的粗网格模型计算结果，建立子模型划分精细网格进行结构细部疲劳评估。
Fatigue failure of metal structural component is a common form of structure collapse, so improving fatigue behavior of metal materials is very important for their usage.
金属构件的疲劳失效是一种常见的结构破坏形式，改善金属材料的疲劳性能对其使用性能的提高有重要意义。
In this paper, an engineering approach for determining initial fatigue quality (IFQ) of aeronautic structure details (fastener holes) is introduced.
本文介绍了一个定量地确定飞机结构细节(紧固孔)的原始疲劳质量的工程方法。
Finally, given that the structure fatigue longevity obey the Weibull distribution, thefatigue reliability formula can be deduced.
最后，在假定结构疲劳寿命服从威布尔分布的基础上，推导了相应的疲劳可靠度公式。
The paper builds the models at different stages of lifting operation on the basis of analysis of loads influencing crane structure fatigue.
在分析影响起重机金属结构疲劳载荷情况的基础上，给出了起重机主梁起吊过程中不同阶段的动力学模型。
In this dissertation, the theory which is known of concrete structure fatigue cumulative damage and damage detection is narrated.
本文阐述了已有的混凝土结构疲劳累积损伤理论和疲劳损伤识别原理。
The results indicate that the mixed use of different-shear stiffness fasteners will lead to obviously reduced structure fatigue life in attached area.
研究结果表明，结构件之间的连接部位混合使用不同剪切刚度的紧固件，将会比较明显地降低结构连接部位的疲劳寿命。
A fatigue life calculation and test was performed to investigate the influence of use of different-stiffness fasteners on structure fatigue life in repair area.
本文通过疲劳寿命计算和试验，研究了结构连接部位的紧固件剪切刚度不同，对疲劳寿命的影响。
The fatigue damage cumulative rule plays a key role on the structure design against fatigue.
疲劳累积损伤分布规律是结构疲劳可靠性分析与设计的关键内容之一。
Widely absorbed some new advantages of mechanical structure fatigue of the domestic and abroad, lots of researches on fatigue problem of locomotive car-body has been done in this thesis.
本文在广泛吸取国内外机械结构疲劳问题的研究成果的基础上，对某型机车车体结构的疲劳问题的研究进行了大量的工作。
It will cause metal structure to fatigue destruction if steel structure is influenced in the vibration for a long time.
钢结构长期在这种振动的影响下就会导致金属结构疲劳破坏；
It will cause metal structure to fatigue destruction if steel structure is influenced in the vibration for a long time.
钢结构长期在这种振动的影响下就会导致金属结构疲劳破坏；
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