1) Fuzzy fatigue reliability
模糊疲劳可靠度
2) fatigue reliability
疲劳可靠度
1.
Buffeting fatigue reliability analysis of cable-stayed bridge;
斜拉索抖振疲劳可靠度分析
2.
In order to quantify the fatigue reliability of stay cable on partially cable-stayed bridge under the influence of vehicle load,based on the accurate analysis for the time history of stay cable,fatigue reliability of the cables of partially cable-stayed bridge under vehicle load is researched according to the principle of equivalent fatigue damage.
鉴于我国《公路斜拉桥设计规范》未对部分斜拉桥拉索的允许应力值作具体规定,因此,为定量地研究车辆荷载作用下部分斜拉桥拉索的疲劳可靠度,在分析斜拉索应力时程的基础上,依据等效疲劳损伤原理,对车辆荷载作用下部分斜拉桥拉索疲劳可靠度进行了研究。
3.
In order to quantify the reliability of stay cable on partially cable-stayed bridge under the influence of vehicle load,fatigue reliability formula of stay cable is modified by assuming that the fatigue life is in accordance with the Weibull distribution.
依据等效疲劳损伤原理,将车辆荷载等效为模型车辆荷载频值谱,利用蒙特卡罗法随机抽样模拟出斜拉索的应力时程,假定结构疲劳寿命服从威布尔分布,推导出疲劳可靠度公式,并以株洲市芦凇大桥主桥为实例进行了验证。
3) fatigue reliability of stiffness
刚度疲劳可靠性
4) fatigue reliability index
疲劳可靠度指标
1.
This paper calculates the fatigue reliability index curve through analysis of crane stress-history course,judges the security of the crane and works out the next monitoring time referred the minimum target reliability index curve which shows crane needed monitoring.
目前国内起重机都是通过每年定期对其重要部位进行检测后,来判断结构的安全状况,这种检测方式具有很大的盲目性,本文通过对起重机工作过程中的应力-时间历程进行分析,计算出其疲劳可靠度指标曲线,并参考起重机结构需要进行检测的最低目标可靠度指标曲线,来判断结构的安全状况并确定结构需要进行检测的时间点,这种基于疲劳可靠性的起重机结构安全检测方法既节约了检测成本,又保证了其能安全有效的运行。
5) System fatigue reliability
系统疲劳可靠度
1.
According to the fatigue failure mechanism of riveted steel bridges,a double-angle probabilistic fracture failure model(DAPFFM) of riveted bridge members and a system fatigue reliability model were proposed based on the whole riveted member fracture mechanics models.
将铆接钢桥系统疲劳可靠性分析模型应用于浙江路桥的系统疲劳可靠度评估,概率剩余寿命评估结果表明:若按保证桥梁的正常使用功能,超声波探测间隔为1。
6) Cable fatigue reliability
拉索疲劳可靠度
补充资料：几何学模糊度
几何学模糊度
放射学术语。由X线管有效焦点大小，即由几何投影因素所产生的照片模拟、影像边界的不锐利程度，又称半影。几何学模糊度(Hf)是X线成像技术中影像模糊的最主要成因。几何模糊度与有效焦点(F)成正比，与物-片距(c)成正比，与靶-物距成反比。若用公式表示，几何学模糊度的值为：Hｆ=〓〓ｃ〓〓ｂ-ｃ〓〓F(b代表靶-片距)。焦点的大小对产生影像半影的关系很大，用小焦点或微焦点可提高照片的清晰度。例如，放大摄影时C值增加，若用小焦点X线管投照则可弥补由于物-片距增加而增加的几何学模糊度。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条